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Early Digital Devices Overview

The early digital era began with discrete logic devices such as diodes and transistors forming gates, flip-flops, and counters. In the 1960s, the advent of monolithic ICs allowed entire logic circuits to exist on a single chip. Early families like the 7400-series TTL and 4000-series CMOS became the foundation for computing, memory, and control systems.

Memory evolved from magnetic cores to semiconductor-based RAM, EPROM, EEPROM, and eventually Flash. These devices enabled non-volatile storage, programmability, and laid the foundation for modern digital electronics.

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74 Series Logic Families

This table lists the main types of logic families under the 74 series. These families provide varying features like speed, power consumption, and voltage compatibility.

Logic Family Technology Voltage Range Speed Power Consumption
7400 Standard TTL 4.75V - 5.25V Low High
74LS Low Power Schottky 4.75V - 5.25V Medium Low
74S Schottky TTL 4.75V - 5.25V High Medium
74ALS Advanced Low Power Schottky 4.75V - 5.25V High Low
74ACT Advanced CMOS with TTL compatible inputs 4.75V - 5.25V High Very Low
74HCT High Speed CMOS with TTL compatible inputs 4.75V - 5.25V High Low
74HC High Speed CMOS 2V - 6V Very High Very Low
74AC Advanced CMOS 4.5V - 5.5V Very High Low
74AUC Advanced Ultra CMOS 1.65V - 3.6V High Very Low
74LVC Low Voltage CMOS 1.65V - 3.6V High Very Low
74LV Low Voltage 1.65V - 3.6V High Very Low
74VHC Very High Speed CMOS 2V - 5.5V Very High Low
74VCT Very High Speed CMOS with TTL Compatible Inputs 4.75V - 5.25V Very High Low

74 Series Logic Part Numbers

This table lists the part numbers of various 74 series logic chips along with their corresponding logic functions and number of pins.

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74x00 – 74x99

Part number 		Units Description Input Output Pins Datasheet
74x00 4 quad 2-input NAND gate 14 SN74LS00
74x01 4 quad 2-input NAND gate; different pinout for 74H01 open-collector 14 SN74LS01
74x02 4 quad 2-input NOR gate 14 SN74LS02
74x03 4 quad 2-input NAND gate open-collector 14 SN74LS03
74x04 6 hex inverter gate 14 SN74LS04
74x05 6 hex inverter gate open-collector 14 SN74LS05
74x06 6 hex inverter gate open-collector 30 V / 40 mA 14 SN74LS06
74x07 6 hex buffer gate open-collector 30 V / 40 mA 14 SN74LS07
74x08 4 quad 2-input AND gate 14 SN74LS08
74x09 4 quad 2-input AND gate open-collector 14 SN74LS09
74x10 3 triple 3-input NAND gate 14 SN74LS10
74x11 3 triple 3-input AND gate 14 SN74LS11
74x12 3 triple 3-input NAND gate open-collector 14 SN74LS12
74x13 2 dual 4-input NAND gate Schmitt trigger 14 SN74LS13
74x14 6 hex inverter gate Schmitt trigger 14 SN74LS14
74x15 3 triple 3-input AND gate open-collector 14 SN74LS15
74x16 6 hex inverter gate open-collector 15 V / 40 mA 14 SN7416
74x17 6 hex buffer gate open-collector 15 V / 40 mA 14 SN7417
74x18 2 dual 4-input NAND gate Schmitt trigger 14 SN74LS18
74x19 6 hex inverter gate Schmitt trigger 14 SN74LS19
74x20 2 dual 4-input NAND gate 14 SN74LS20
74x21 2 dual 4-input AND gate 14 SN74LS21
74x22 2 dual 4-input NAND gate open-collector 14 SN74LS22
74x23 2 dual 4-input NOR gate with strobe, one gate expandable with 74x60 16 SN7423
74x24 4 quad 2-input NAND gate Schmitt trigger 14 SN74LS24
74x25 2 dual 4-input NOR gate with strobe 14 SN7425
74x26 4 quad 2-input NAND gate open-collector 15 V 14 SN74LS26
74x27 3 triple 3-input NOR gate 14 SN74LS27
74x28 4 quad 2-input NOR gate driver NO=30 14 SN74LS28
74x29 2 dual 4-input NOR gate 14 US7429A
74x30 1 single 8-input NAND gate 14 SN74LS30
74x31 6 hex delay elements (two 6ns, two 23-32ns, two 45-48ns) 16 SN74LS31
74x32 4 quad 2-input OR gate 14 SN74LS32
74x33 4 quad 2-input NOR gate open-collector driver NO=30 14 SN74LS33
74x34 6 hex buffer gate 14 MM74HC34
74x35 6 hex buffer gate open-collector 14 SN74ALS35
74x36 4 quad 2-input NOR gate (different pinout than 7402) 14 SN74HC36
74x37 4 quad 2-input NAND gate driver NO=30 14 SN74LS37
74x38 4 quad 2-input NAND gate open-collector driver NO=30 14 SN74LS38
74x39 4 quad 2-input NAND gate (different pinout than 7438) open-collector 60 mA 14 SN7439
74x40 2 dual 4-input NAND gate driver NO=30 14 SN74LS40
74x41 1 BCD to decimal decoder / Nixie tube driver open-collector 70 V 16 DM7441A
74x42 1 BCD to decimal decoder 16 SN74LS42
74x43 1 excess-3 to decimal decoder 16 SN7443A
74x44 1 Gray code to decimal decoder 16 SN7444A
74x45 1 BCD to decimal decoder/driver open-collector 30 V / 80 mA 16 SN7445
74x46 1 BCD to 7-segment display decoder/driver open-collector 30 V 16 SN7446A
74x47 1 BCD to 7-segment decoder/driver open-collector 15 V 16 SN74LS47
74x48 1 BCD to 7-segment decoder/driver open-collector, 2 kΩ pull-up 16 SN74LS48
74x49 1 BCD to 7-segment decoder/driver open-collector 14 SN74LS49
74x50 2 dual 2-2-input AND-OR-Invert gate, one gate expandable 14 SN7450
7451, 74H51, 74S51 2 dual 2-2-input AND-OR-Invert (AOI) gate 14 SN7451
74L51, 74LS51 2 3-3-input AND-OR-Invert gate and 2-2-input AND-OR-Invert gate 14 SN74LS51
74x52 1 3-2-2-2-input AND-OR gate, expandable with 74x61 14 SN74H52
7453 1 2-2-2-2-input AND-OR-Invert gate, expandable 14 SN7453
74H53 1 3-2-2-2-input AND-OR-Invert gate, expandable 14 SN74H53
7454 1 2-2-2-2-input AND-OR-Invert gate 14 SN7454
74H54 1 3-2-2-2-input AND-OR-Invert gate 14 SN74H54
74L54, 74LS54 1 3-3-2-2-input AND-OR-Invert gate 14 SN74LS54
74x55 1 4-4-input AND-OR-Invert gate, 74H55 is expandable 14 SN74LS55
74x56 1 50:1 frequency divider 8 SN74LS56
74x57 1 60:1 frequency divider 8 SN74LS57
74x58 2 3-3-input AND-OR gate and 2-2-input AND-OR gate 14 74HC58
74x59 2 dual 3-2-input AND-OR-Invert gate 14 US7459A
74x60 2 dual 4-input expander for 74x23, 74x50, 74x53, 74x55 14 SN7460
74x61 3 triple 3-input expander for 74x52 14 SN74H61
74x62 1 3-3-2-2-input AND-OR expander for 74x50, 74x53, 74x55 14 SN74H62
74x63 6 hex current sensing interface gates 14 SN74LS63
74x64 1 4-3-2-2-input AND-OR-Invert gate 14 SN74S64
74x65 1 4-3-2-2 input AND-OR-Invert gate open-collector 14 SN74S65
74x67 1 AND gated J-K master-slave flip-flop, asynchronous preset and clear (improved 74L72) (16) BL54L67Y
74L68 2 dual J-K flip-flop, asynchronous clear (improved 74L73) (18) BL54L68Y
74LS68 2 dual 4-bit decade counters 16 SN74LS68
74L69 2 dual J-K flip-flop, asynchronous preset, common clock and clear (18) BL54L69Y
74LS69 2 dual 4-bit binary counters 16 SN74LS69
74x70 1 AND-gated positive edge triggered J-K flip-flop, asynchronous preset and clear 14 SN7470
74H71 1 AND-OR-gated J-K master-slave flip-flop, preset 14 SN74H71
74L71 1 AND-gated R-S master-slave flip-flop, preset and clear 14 SN54L71
74x72 1 AND gated J-K master-slave flip-flop, asynchronous preset and clear 14 SN7472
74x73 2 dual J-K flip-flop, asynchronous clear 14 SN54LS73A
74x74 2 dual D positive edge triggered flip-flop, asynchronous preset and clear 14 SN74LS74A
74x75 1 4-bit bistable latch, complementary outputs 16 SN74LS75
74x76 2 dual J-K flip-flop, asynchronous preset and clear 16 SN74LS76A
74x77 1 4-bit bistable latch 14 SN54LS77
74H78 2 dual positive pulse triggered J-K flip-flop, preset, common clock and common clear 14 SN74H78
74L78 2 dual positive pulse triggered J-K flip-flop, preset, common clock and common clear 14 SN54L78
74LS78 2 dual negative edge triggered J-K flip-flop, preset, common clock and common clear 14 SN74LS78A
74x79 2 dual D positive edge triggered flip-flop, asynchronous preset and clear 14 MC7479
74x80 1 gated full adder 14 SN7480
74x81 1 16-bit RAM 14 SN7481A
74x82 1 2-bit binary full adder 14 SN7482
74x83 1 4-bit binary full adder 16 SN74LS83A
74x84 1 16-bit RAM 16 SN7484A
74x85 1 4-bit magnitude comparator 16 SN74LS85
74x86 4 quad 2-input XOR gate 14 SN74LS86A
74x87 1 4-bit true/complement/zero/one element 14 SN74H87
74x88 1 256-bit ROM (32x8) open-collector 16 SN7488A
74x89 1 64-bit RAM (16x4), 4 data inputs, 4 inverted data outputs open-collector 16 SN7489
74x90 1 decade counter (separate divide-by-2 and divide-by-5 sections) 14 SN74LS90
74x91 1 8-bit shift register, serial in, serial out, gated input 14 SN74LS91
74x92 1 divide-by-12 counter (separate divide-by-2 and divide-by-6 sections) 14 SN74LS92
74x93 1 4-bit binary counter (separate divide-by-2 and divide-by-8 sections); different pinout for 74L93 14 SN74LS93
74x94 1 4-bit shift register, dual asynchronous presets 16 SN7494
74x95 1 4-bit shift register, parallel in, parallel out, serial input; different pinout for 74L95 14 SN74LS95B
74x96 1 5-bit parallel-in/parallel-out shift register, asynchronous preset 16 SN74LS96
74x97 1 synchronous 6-bit binary rate multiplier 16 SN7497
74x98 1 4-bit data selector/storage register 16 SN54L98
74x99 1 4-bit bidirectional universal shift register 16 SN54L99

74x100 – 74x199

Part number 		Units Description Input Output Pins Datasheet
74x100 2 dual 4-bit bistable latch 24 SN74100
74x101 1 AND-OR-gated J-K negative-edge-triggered flip-flop, preset 14 SN74H101
74x102 1 AND-gated J-K negative-edge-triggered flip-flop, preset and clear 14 SN74H102
74x103 2 dual J-K negative-edge-triggered flip-flop, clear 14 SN74H103
74x104 1 J-K master-slave flip-flop 14 SN74104
74x105 1 J-K master-slave flip-flop, J2 and K2 inverted 14 SN74105
74x106 2 dual J-K negative-edge-triggered flip-flop, preset and clear 16 SN74H106
74x107 2 dual J-K flip-flop, clear 14 SN74LS107A
74x108 2 dual J-K negative-edge-triggered flip-flop, preset, common clear and common clock 14 SN74H108
74x109 2 dual J-NotK positive-edge-triggered flip-flop, clear and preset 16 SN74LS109A
74x110 1 AND-gated J-K master-slave flip-flop, data lockout 14 SN74110
74x111 2 dual J-K master-slave flip-flop, data lockout, reset, set 16 SN74111
74x112 2 dual J-K negative-edge-triggered flip-flop, clear and preset 16 SN74LS112A
74x113 2 dual J-K negative-edge-triggered flip-flop, preset 14 SN74LS113A
74x114 2 dual J-K negative-edge-triggered flip-flop, preset, common clock and clear 14 SN74LS114A
74x115 2 dual J-K master-slave flip-flop, data lockout, reset 14 TL74115N
74116, 74L116 2 dual 4-bit latch, clear 24 SN74116 [7]: 1–123 
74H116 1 AND-gated J-K flip flop 14 MC74H116
74x117 1 AND-gated J-K flip flop, one J and K input inverted 14 MC74H117
74x118 6 hex set/reset latch, common reset 16 ITT74118
74119 6 hex set/reset latch 24 TL74119N [7]: 1–125 
74H119 2 dual J-K flip-flop, shared clear and clock inputs 14 MC74H119
74120 2 dual pulse synchronizer/drivers 15 kΩ pull-up 16 SN74120
74H120 2 dual J-K flip-flop, separate clock inputs 14 MC74H120
74x121 1 monostable multivibrator Schmitt trigger 14 SN74121
74x122 1 retriggerable monostable multivibrator, clear 14 SN74LS122
74x123 2 dual retriggerable monostable multivibrator, clear 16 SN74LS123
74x124 2 dual voltage-controlled oscillator analog 16 SN74S124
74x125 4 quad bus buffer, negative enable three-state 14 SN74LS125A
74x126 4 quad bus buffer, positive enable three-state 14 SN74LS126A
74x128 4 quad 2-input NOR gate driver 50 Ω 14 SN74128
74x130 2 retriggerable monostable multivibrator 16 SN74130
74131 4 quad 2-input AND gate open-collector 15 V 14 ITT74131
74AS131, 74ALS131 1 3-to-8 line decoder/demultiplexer, address register, inverting outputs 16 SN74AS131
74x132 4 quad 2-input NAND gate Schmitt trigger 14 SN74LS132
74x133 1 single 13-input NAND gate 16 SN74ALS133
74x134 1 single 12-input NAND gate three-state 16 SN74S134
74x135 4 quad XOR/XNOR gate, two inputs to select logic type 16 SN74S135
74x136 4 quad 2-input XOR gate open-collector 14 SN74LS136
74x137 1 3-to-8 line decoder/demultiplexer, address latch, inverting outputs 16 SN74LS137
74x138 1 3-to-8 line decoder/demultiplexer, inverting outputs 16 SN74LS138
74x139 2 dual 2-to-4 line decoder/demultiplexer, inverting outputs 16 SN74LS139A
74x140 2 dual 4-input NAND gate driver 50 Ω 14 SN74S140
74x141 1 BCD to decimal decoder/driver for cold-cathode indicator / Nixie tube open-collector 60 V 16 DM74141
74x142 1 decade counter/latch/decoder/driver for Nixie tubes open-collector 60 V 16 SN74142
74x143 1 decade counter/latch/decoder/7-segment driver constant current 15 mA 24 SN74143
74x144 1 decade counter/latch/decoder/7-segment driver open-collector 15 V / 25 mA 24 SN74144
74x145 1 BCD to decimal decoder/driver open-collector 15 V / 80 mA 16 SN74LS145
74x146 1 3-to-8 line decoder MCE74H146
74x147 1 10-line to 4-line priority encoder 16 SN74LS147
74x148 1 8-line to 3-line priority encoder 16 SN74LS148
74x149 1 8-line to 8-line priority encoder 20 MM74HCT149
74x150 1 16-line to 1-line data selector/multiplexer 24 SN74150
74x151 1 8-line to 1-line data selector/multiplexer 16 SN74LS151
74x152 1 8-line to 1-line data selector/multiplexer, inverting output 14 SN54152A
74x153 2 dual 4-line to 1-line data selector/multiplexer, non-inverting outputs 16 SN74LS153
74x154 1 4-to-16 line decoder/demultiplexer, inverting outputs 24 SN74154
74x155 2 dual 2-to-4 line decoder/demultiplexer, inverting outputs 16 SN74LS155A
74x156 2 dual 2-to-4 line decoder/demultiplexer, inverting outputs open-collector 16 SN74LS156
74x157 4 quad 2-line to 1-line data selector/multiplexer, non-inverting outputs 16 SN74LS157
74x158 4 quad 2-line to 1-line data selector/multiplexer, inverting outputs 16 SN74LS158
74x159 1 4-to-16 line decoder/demultiplexer open-collector 24 SN74159
74x160 1 synchronous presettable 4-bit decade counter, asynchronous clear 16 SN74LS160A
74x161 1 synchronous presettable 4-bit binary counter, asynchronous clear 16 SN74LS161A
74x162 1 synchronous presettable 4-bit decade counter, synchronous clear 16 SN74LS162A
74x163 1 synchronous presettable 4-bit binary counter, synchronous clear 16 SN74LS163A
74x164 1 8-bit serial-in parallel-out (SIPO) shift register, asynchronous clear, not output latch 14 SN74164
74x165 1 8-bit parallel-in serial-out (PISO) shift register, parallel load, complementary outputs 16 SN74LS165A
74x166 1 parallel-load 8-bit shift register 16 SN74LS166A
74x167 1 synchronous decade rate multiplier 16 SN74167
74x168 1 synchronous presettable 4-bit up/down decade counter 16 DM74LS168
74x169 1 synchronous presettable 4-bit up/down binary counter 16 SN74LS169B
74x170 1 16-bit register file (4x4) open-collector 16 SN74170
74x171 4 quad D flip-flops, clear 16 SN74LS171
74x172 1 16-bit multiple port register file (8x2) three-state 24 SN74172
74x173 4 quad D flip-flop, asynchronous clear three-state 16 SN74LS173A
74x174 6 hex D flip-flop, common asynchronous clear 16 SN74LS174
74x175 4 quad D edge-triggered flip-flop, complementary outputs and asynchronous clear 16 SN74LS175
74x176 1 presettable decade (bi-quinary) counter/latch 14 SN74176
74x177 1 presettable binary counter/latch 14 SN74177
74x178 1 4-bit parallel-access shift register 14 SN74178
74x179 1 4-bit parallel-access shift register, asynchronous clear input, complementary Qd output 16 SN74179
74x180 1 9-bit odd/even parity bit generator and checker 14 SN74180
74x181 1 4-bit arithmetic logic unit and function generator 24 SN74LS181
74x182 1 lookahead carry generator 16 SN74S182
74x183 2 dual carry-save full adder 14 SN74LS183
74x184 1 BCD to binary converter open-collector 16 SN74184
74x185 1 6-bit binary to BCD converter open-collector 16 SN74185A
74x186 1 512-bit ROM (64x8) open-collector 24 SN74186
74x187 1 1024-bit ROM (256x4) open-collector 16 SN74187
74x188 1 256-bit PROM (32x8) open-collector 16 SN74S188
74x189 1 64-bit RAM (16x4), 4 data inputs, 4 inverted data outputs three-state 16 SN74S189
74x190 1 synchronous presettable up/down 4-bit decade counter 16 SN74LS190
74x191 1 synchronous presettable up/down 4-bit binary counter 16 SN74LS191
74x192 1 synchronous presettable up/down 4-bit decade counter, clear 16 SN74LS192
74x193 1 synchronous presettable up/down 4-bit binary counter, clear 16 SN74LS193
74x194 1 4-bit bidirectional universal shift register 16 SN74194
74x195 1 4-bit parallel-access shift register 16 SN74195
74x196 1 presettable 4-bit decade counter/latch 14 SN74196
74x197 1 presettable 4-bit binary counter/latch 14 SN74197
74x198 1 8-bit bidirectional universal shift register 24 SN74198
74x199 1 8-bit universal shift register, J-NotK serial inputs 24 SN74199

74x200 – 74x299

Part number 		Units Description Input Output Pins Datasheet
74x200 1 256-bit RAM (256x1) three-state 16 DM74S200
74x201 1 256-bit RAM (256x1) three-state 16 SN74S201
74x202 1 256-bit RAM (256x1) with power down three-state 16 SN74LS202
74x206 1 256-bit RAM (256x1) open-collector 16 DM74S206
74x207 1 1024-bit RAM (256x4) three-state 16 SN74LS207
74x208 1 1024-bit RAM (256x4), separate data in- and outputs three-state 20 SN74LS208
74x209 1 1024-bit RAM (1024x1) three-state 16 SN74S209
74x210 8 octal buffer, inverting three-state 20 SN74LS210
74x211 1 144-bit RAM (16x9) with output latch three-state 20 74F211
74x212 1 144-bit RAM (16x9) three-state 20 74F212
74x213 1 192-bit RAM (16x12) three-state 20 74F213
74x214 1 1024-bit RAM (1024x1) three-state 16 SN74LS214
74x215 1 1024-bit RAM (1024x1) with power-down mode three-state 16 SN74LS215
74x216 1 256-bit RAM (64x4), common I/O three-state 16 SN74LS216
74x217 1 256-bit RAM (64x4) three-state 20 SN74ALS217
74x218 1 256-bit RAM (32x8) three-state 20 SN74ALS218
74x219 1 64-bit RAM (16x4), non-inverting outputs three-state 16 SN74LS219
74x221 2 dual monostable multivibrator Schmitt trigger 16 SN74LS221
74x222 1 64-bit FIFO memory (16x4), synchronous, input/output ready enable three-state 20 SN74LS222
74x224 1 64-bit FIFO memory (16x4), synchronous three-state 16 SN74LS224
74x225 1 80-bit FIFO memory (16x5), asynchronous three-state 20 SN74S225
74x226 1 4-bit parallel latched bus transceiver three-state 16 SN74S226
74x227 1 64-bit FIFO memory (16x4), synchronous, input/output ready enable open-collector 20 SN74LS727
74x228 1 64-bit FIFO memory (16x4), synchronous open-collector 20 SN74LS728
74x229 1 80-bit FIFO memory (16x5), asynchronous three-state 20 SN74ALS229B
74x230 2 dual 4-bit buffer/driver, one inverted, one non-inverted; negative enable three-state 20 SN74AS230
74x231 2 dual 4-bit buffer/driver, both inverted; one positive and one negative enable three-state 20 SN74AS231
74x232 1 64-bit FIFO memory (16x4), asynchronous three-state 16 SN74ALS232B
74x233 1 80-bit FIFO memory (16x5), asynchronous three-state 20 SN74ALS233B
74x234 1 256-bit FIFO memory (64x4), asynchronous three-state 16 SN74ALS234
74x235 1 320-bit FIFO memory (64x5), asynchronous three-state 20 SN74ALS235
74x236 1 256-bit FIFO memory (64x4), asynchronous three-state 16 SN74ALS236
74x237 1 3-to-8 line decoder/demultiplexer, address latch, active high outputs 16 CD74HC237
74x238 1 3-to-8 line decoder/demultiplexer, active high outputs 16 CD74HC238
74x239 2 dual 2-to-4 line decoder/demultiplexer, active high outputs 16 SN74HC239
74x240 8 octal buffer, inverting outputs Schmitt trigger three-state 20 SN74LS240
74x241 8 octal buffer, non-inverting outputs Schmitt trigger three-state 20 SN74LS241
74x242 4 quad bus transceiver, inverting outputs Schmitt trigger three-state 14 SN74LS242
74x243 4 quad bus transceiver, non-inverting outputs Schmitt trigger three-state 14 SN74LS243
74x244 8 octal buffer, non-inverting outputs Schmitt trigger three-state 20 SN74LS244
74x245 8 octal bus transceiver, non-inverting outputs Schmitt trigger three-state 20 SN74LS245
74x246 1 BCD to 7-segment decoder/driver open-collector 30 V 16 SN74246
74x247 1 BCD to 7-segment decoder/driver open-collector 15 V 16 SN74LS247
74x248 1 BCD to 7-segment decoder/driver open-collector, 2 kΩ pull-up 16 SN74LS248
74x249 1 BCD to 7-segment decoder/driver open-collector 16 SN74249
74x250 1 1 of 16 data selector/multiplexer three-state 24 SN74AS250
74x251 1 8-line to 1-line data selector/multiplexer, complementary outputs three-state 16 SN74LS251
74x253 2 dual 4-line to 1-line data selector/multiplexer three-state 16 SN74LS253
74x255 2 dual 2-to-4 line decoder/demultiplexer, inverting outputs three-state 16 74LS255
74x256 2 dual 4-bit addressable latch 16 MC74F256
74x257 4 quad 2-line to 1-line data selector/multiplexer, non-inverting outputs three-state 16 SN74LS257B
74x258 4 quad 2-line to 1-line data selector/multiplexer, inverting outputs three-state 16 SN74LS258B
74x259 1 8-bit bit addressable input latch with clr 16 SN74LS259B
74x260 2 dual 5-input NOR gate 14 SN74LS260
74x261 1 2-bit by 4-bit parallel binary multiplier 16 SN74LS261
74x262 1 5760-bit ROM (Teletext character set, 128 characters 5x9) three-state 20 SN74S262N
74x264 1 look ahead carry generator 16 SN74AS264
74x265 4 quad complementary output elements 16 SN74265
74x266 4 quad 2-input XNOR gate open-collector 14 SN74LS266
74x268 6 hex D-type latches, common output control, common enable three-state 16 SN74S268
74x269 1 8-bit bidirectional binary counter 24 MC74F269
74x270 1 2048-bit ROM (512x4) open-collector 16 SN74S270
74x271 1 2048-bit ROM (256x8) open-collector 20 SN74S271
74x273 1 8-bit register, asynchronous clear 20 SN74LS273
74x274 1 4-bit by 4-bit binary multiplier three-state 20 SN74S274
74x275 1 7-bit slice Wallace tree three-state 16 SN74S275
74x276 4 quad J-NotK edge-triggered flip-flops, separate clocks, common preset and clear 20 SN74276
74x278 1 4-bit cascadeable priority registers, latched data inputs 14 SN74278
74x279 4 quad set-reset latch 16 SN74LS279A
74x280 1 9-bit odd/even parity bit generator/checker 14 SN74LS280
74x281 1 4-bit parallel binary accumulator 24 SN74S281
74x282 1 look-ahead carry generator, selectable carry inputs 20 SN74AS282
74x283 1 4-bit binary full adder (has carry in function) 16 SN74LS283
74x284 1 4-bit by 4-bit parallel binary multiplier (high order 4 bits of product) 16 SN74284
74x285 1 4-bit by 4-bit parallel binary multiplier (low order 4 bits of product) 16 SN74285
74x286 1 9-bit parity generator/checker, bus driver parity I/O port 14 SN74AS286
74x287 1 1024-bit PROM (256x4) three-state 16 SN74S287
74x288 1 256-bit PROM (32x8) three-state 16 SN74S288
74x289 1 64-bit RAM (16x4), 4 data inputs, 4 inverted data outputs open-collector 16 SN74S289
74x290 1 decade counter (separate divide-by-2 and divide-by-5 sections) 14 SN74LS290
74x292 1 programmable frequency divider/digital timer 16 SN74LS292
74x293 1 4-bit binary counter (separate divide-by-2 and divide-by-8 sections) 14 SN74LS293
74x294 1 programmable frequency divider/digital timer 16 SN74LS294
74x295 1 4-bit bidirectional shift register three-state 14 SN74LS295B
74x297 1 digital phase-locked loop filter 16 SN74LS297
74x298 4 quad 2-input multiplexer, storage 16 SN74298
74x299 1 8-bit bidirectional universal shift/storage register three-state 20 SN74LS299

74x300 – 74x399

Part number 		Units Description Input Output Pins Datasheet
74x300 1 256-bit RAM (256x1) open-collector 16 SN74LS300A
74x301 1 256-bit RAM (256x1) open-collector 16 SN74S301
74x302 1 256-bit RAM (256x1) open-collector 16 SN74LS302
74x303 1 octal divide-by-2 clock driver, 2 outputs inverted 16 SN74AS303
74x304 1 octal divide-by-2 clock driver 16 SN74AS304
74x305 1 octal divide-by-2 clock driver, 4 outputs inverted 16 SN74AS305
74x306 1 8-bit LV-TTL to GTL+ bus transceiver three-state and open-collector (24) SN74GTLPH306
74x309 1 1024-bit RAM (1024x1) open-collector 16 SN74S309
74x310 8 octal buffer, inverting Schmitt trigger three-state 20 SN74LS310
74x311 1 144-bit RAM (16x9) with output latch open-collector 20 74F311
74x312 1 144-bit RAM (16x9) open-collector 20 74F312
74x313 1 192-bit RAM (16x12) open-collector 20 74F313
74x314 1 1024-bit RAM (1024x1) open-collector 16 SN74LS314
74x315 1 1024-bit RAM (1024x1) with power-down mode open-collector 16 SN74LS315
74x316 1 256-bit RAM (64x4), common I/O open-collector 16 SN74LS316
74x317 1 256-bit RAM (64x4) open-collector 20 SN74ALS317
74x318 1 256-bit RAM (32x8) open-collector 20 SN74ALS318
74x319 1 64-bit RAM (16x4) open-collector 16 SN74LS319
74x320 1 crystal-controlled oscillator 16 SN74LS320
74x321 1 crystal-controlled oscillators, F/2 and F/4 count-down outputs 16 SN74LS320
74x322 1 8-bit shift register, sign extend three-state 20 SN74LS322A
74x323 1 8-bit bidirectional universal shift/storage register, synchronous clear three-state 20 SN74LS323
74x324 1 voltage-controlled oscillator (or crystal controlled), enable input, complementary outputs analog 14 SN74LS324
74x325 2 dual voltage-controlled oscillator (or crystal controlled), complementary outputs analog 16 SN74LS325
74x326 2 dual voltage-controlled oscillator (or crystal controlled), enable input, complementary outputs analog 16 SN74LS326
74x327 2 dual voltage-controlled oscillator (or crystal controlled) analog 14 SN74LS327
74x330 1 PLA (12 inputs, 50 terms, 6 outputs) three-state 20 SN74S330
74x331 1 PLA (12 inputs, 50 terms, 6 outputs) open-collector, 2.5 kΩ pull-up 20 SN74S331
74x333 1 PLA (12 inputs, 32 terms, 6 outputs, 4 state registers) three-state 24 SN74LS333
74x334 1 PLA (12 inputs, 32 terms, 6 outputs) three-state 24 SN74LS334
74x335 1 PLA (12 inputs, 32 terms, 6 outputs, 4 state registers) open-collector 24 SN74LS335
74x336 1 PLA (12 inputs, 32 terms, 6 outputs) open-collector 24 SN74LS336
74x337 1 clock driver three-state 20 SN74ABT337
74x340 8 octal buffer, inverting outputs Schmitt trigger three-state 20 SN74S340
74x341 8 octal buffer, non-inverting outputs Schmitt trigger three-state 20 SN74S341
74x344 8 octal buffer, non-inverting outputs Schmitt trigger three-state 20 SN74S344
74x347 1 BCD to 7-segment decoders/drivers, low voltage version of 7447 open-collector 16 SN74LS347
74x348 1 8 to 3-line priority encoder three-state 16 SN74LS348
74x350 1 4-bit shifter three-state 16 SN74S350
74x351 2 dual 8-line to 1-line data selectors/multiplexers, 4 common data inputs three-state 20 SN74351
74x352 2 dual 4-line to 1-line data selectors/multiplexers, inverting outputs 16 SN74LS352
74x353 2 dual 4-line to 1-line data selectors/multiplexers, inverting outputs three-state 16 SN74LS353
74x354 1 8-line to 1-line data selector/multiplexer, transparent registers three-state 20 CD74HC354
74x355 1 8-line to 1-line data selector/multiplexer, transparent registers open-collector 20 SN74LS355
74x356 1 8-line to 1-line data selector/multiplexer, edge-triggered registers three-state 20 CD74HCT356
74x357 1 8-line to 1-line data selector/multiplexer, edge-triggered registers open-collector 20 SN74LS357
74x361 1 bubble memory function timing generator 22 SN74LS361
74x362 1 four-phase clock generator/driver for Texas Instruments TMS9900 20 SN74LS362
74x363 1 octal transparent latch three-state 20 SN74LS363
74x364 1 octal edge-triggered D-type register three-state 20 SN74LS364
74x365 6 hex buffer, non-inverting outputs three-state 16 SN74LS365A
74x366 6 hex buffer, inverting outputs three-state 16 SN74LS366A
74x367 6 hex buffer, non-inverting outputs three-state 16 SN74LS367A
74x368 6 hex buffer, inverting outputs three-state 16 SN74LS368A
74x370 1 2048-bit ROM (512x4) three-state 16 SN74S370
74x371 1 2048-bit ROM (256x8) three-state 20 SN74S371
74x373 8 octal transparent latch three-state 20 SN74LS373
74x374 8 octal register three-state 20 SN74LS374
74x375 4 quad bistable latch 16 SN74LS375
74x376 4 quad J-NotK flip-flop, common clock and common clear 16 SN74376
74x377 1 8-bit register, clock enable 20 SN74LS377
74x378 1 6-bit register, clock enable 16 SN74LS378
74x379 1 4-bit register, clock enable and complementary outputs 16 SN74LS379
74x380 1 8-bit multifunction register (combines features of x374, x377, x273, x534 ICs) three-state 24 SN74LS380
74x381 1 4-bit arithmetic logic unit/function generator, generate and propagate outputs 20 SN74LS381A
74x382 1 4-bit arithmetic logic unit/function generator, ripple carry and overflow outputs 20 SN74LS382
74x383 1 8-bit register open-collector 20 SN74S383
74x384 1 8-bit by 1-bit two's complement multipliers 16 SN74LS384
74x385 4 quad serial adder/subtractor 20 SN74LS385
74x386 4 quad 2-input XOR gate 14 SN74LS386
74x387 1 1024-bit PROM (256x4) open-collector 16 SN74S387
74x388 1 4-bit D-type register three-state and standard 16 Am74S388
74x390 2 dual 4-bit decade counter, asynchronous clear 16 SN74LS390
74x393 2 dual 4-bit binary counter, asynchronous clear 14 SN74LS393
74x395 1 4-bit cascadable shift register three-state 16 SN74LS395A
74x396 8 octal storage registers, parallel access 16 SN74LS396
74x398 4 quad 2-input multiplexers, storage and complementary outputs 20 SN74LS398
74x399 4 quad 2-input multiplexer, storage 16 SN74LS399

74x400 – 74x499

Part number 		Units Description Input Output Pins Datasheet
74x401 1 CRC generator/checker 14 74F401
74x402 1 serial data polynomial generator/checker 16 74F402
74x403 1 64-bit FIFO memory (16x4) three-state 24 74F403
74x405 1 3-to-8 line decoder (equivalent to Intel 8205) 16 UCY74S405
74406 1 3-to-8 line decoder 14 MC74406P
74AVCA406 1 ESD-protected voltage-translation transceiver (48) SN74AVCA406
74x407 1 data access register three-state 24 74F407
74408 1 8-bit parity tree 14 MC74408
74S408 1 controller/driver for 16k/64k/256k dRAM 48 SN74S408
74x409 1 controller/driver for 16k/64k/256k dRAM 48 SN74S409
74x410 1 64-bit RAM (16x4) with output register three-state 18 74F410
74x411 1 FIFO RAM controller 40 74F411
74x412 1 multi-mode buffered 8-bit latches (equivalent to Intel 3212/8212) three-state 24 SN74S412
74x413 1 256-bit FIFO memory (64x4) 16 74F413
74x414 1 interrupt priority controller for Intel 8080 (equivalent to Intel 8214) 24 UCY74S414
74416 1 modulo 10 counter, preload and clear inputs 16 MC74416[8]: 50 
74S416 1 4-bit bidirectional bus transceiver, non-inverting (equivalent to Intel 8216) three-state 16 UCY74S416
74x417 2 modulo 2 and modulo 5 counters, common preload and clear inputs 16 MC74417
74418 1 modulo 16 counter, preload and clear inputs 16 MC74418[8]: 51 
74F418 1 32-bit error detection and correction circuit three-state 48 74F418
74419 2 dual modulo 4 counters, common preload and clear inputs 16 MC74419
74S419 1 FIFO RAM controller 40 74S419
74x420 1 32-bit check bit / syndrome bit generator three-state 48 74F420
74x422 1 retriggerable monostable multivibrators, two inputs 14 SN74LS422
74x423 2 dual retriggerable monostable multivibrator 16 SN74LS423
74424 2 dual voltage-controlled oscillator 14 MC74424[8]: 52 
74LS424 1 two-phase clock generator/driver for Intel 8080 (equivalent to Intel 8224) 16 SN74LS424
74x425 4 quad bus buffers, active low enables three-state 14 SN74425
74x426 4 quad bus buffers, active high enables three-state 14 SN74426
74x428 1 system controller for Intel 8080A (equivalent to Intel 8228) 28 SN74S428
74x429 1 FIFO RAM controller three-state 28 74LS429
74x430 1 cyclic redundancy checker/corrector 28 74F430
74x432 1 8-bit multi-mode buffered latch three-state 24 74F432
74x433 1 256-bit FIFO memory (64x4) three-state 24 74F433
74x436 1 line driver/memory driver circuits - MOS memory interface, damping output resistor 16 SN74S436
74x437 1 line driver/memory driver circuits - MOS memory interface 16 SN74S437
74x438 1 system controller for Intel 8080A (equivalent to Intel 8238) 28 SN74S438
74x440 4 quad tridirectional bus transceiver, non-inverting outputs open-collector 20 SN74LS440
74x441 4 quad tridirectional bus transceiver, inverting outputs open-collector 20 SN74LS441
74x442 4 quad tridirectional bus transceiver, non-inverting outputs three-state 20 SN74LS442
74x443 4 quad tridirectional bus transceiver, inverting outputs three-state 20 SN74LS443
74x444 4 quad tridirectional bus transceiver, inverting and non-inverting outputs three-state 20 SN74LS444
74x445 1 BCD to decimal decoders/drivers driver 80 mA 16 SN74LS445
74x446 4 quad bus transceivers, direction controls, inverting outputs three-state 16 SN74LS446
74x447 1 BCD to 7-segment decoders/drivers, low voltage version of 74247 open-collector 16 SN74LS447
74x448 4 quad tridirectional bus transceiver, inverting and non-inverting outputs open-collector 20 SN74LS448
74x449 4 quad bus transceivers, direction controls, non-inverting outputs three-state 16 SN74LS449
74450 1 counter, latch, 7-segment decoder open-collector 16 MC74450
74S450 1 8192-bit PROM (1024x8) with power-down three-state 24 SN74S450
74LS450 1 16-to-1 multiplexer, complementary outputs 24 SN74LS450
74S451 1 8192-bit PROM (1024x8) with power-down open-collector 24 SN74S451
74LS451 2 dual 8-to-1 multiplexer 24 SN74LS451
74x452 2 dual decade counter, synchronous 16 MC74452
74453 2 dual binary counter, synchronous 16 MC74453
74LS453 4 quad 4-to-1 multiplexer 24 SN74LS453
74x454 2 dual decade up/down counter, synchronous, preset input 24 MC74454
74455 2 dual binary up/down counter, synchronous, preset input 24 MC74455
74F455 1 octal buffer / line driver with parity, inverting three-state 24 74F455
74456 1 4-bit NBCD full adder 16 MC74456
74F456 1 octal buffer / line driver with parity, non-inverting three-state 24 74F456
74x458 1 nines complement / zero element 14 MC74458
74460 1 4-bit bus transfer switch three-state 16 MC74460
74LS460 1 10-bit comparator 24 SN74LS460
74x461 1 8-bit presettable binary counter three-state 24 SN74LS461
74x462 1 fiber-optic data-link transmitter open-collector 100 mA and standard 20 SN74LS462
74x463 1 fiber-optic data-link receiver analog 20 SN74LS463
74x465 8 octal buffer, non-inverting outputs three-state 20 SN74LS465
74x466 8 octal buffers, inverting outputs three-state 20 SN74LS466
74x467 8 octal buffers, non-inverting outputs three-state 20 SN74LS467
74x468 8 octal buffers, inverting outputs three-state 20 SN74LS468
74x469 1 8-bit synchronous up/down counter, parallel load and hold capability three-state 24 SN74LS469
74x470 1 2048-bit PROM (256x8) open-collector 20 SN74S470
74x471 1 2048-bit PROM (256x8) three-state 20 SN74S471
74x472 1 4096-bit PROM (512x8) three-state 20 SN74S472
74x473 1 4096-bit PROM (512x8) open-collector 20 SN74S473
74x474 1 4096-bit PROM (512x8) three-state 24 SN74S474
74x475 1 4096-bit PROM (512x8) open-collector 24 SN74S475
74x476 1 4096-bit PROM (1024x4) three-state 18 SN74S476
74x477 1 4096-bit PROM (1024x4) open-collector 18 SN74S477
74x478 1 8192-bit PROM (1024x8) three-state 24 SN74S478
74x479 1 8192-bit PROM (1024x8) open-collector 24 SN74S479
74x480 1 single burst error recovery circuit 24 SN74S480
74x481 1 4-bit slice cascadable processor elements (48) SN74S481
74x482 1 4-bit slice expandable control elements 20 SN74S482
74x484 1 BCD-to-binary converter three-state 20 SN74S484A
74x485 1 binary-to-BCD converter three-state 20 SN74S485A
74x488 1 IEEE-488 bus interface 48 74ACT488
74x490 2 dual decade counter 16 SN74490
74x491 1 10-bit binary up/down counter, limited preset three-state 24 SN74LS491
74x498 1 8-bit bidirectional shift register, parallel inputs three-state 24 SN74LS498

74x500 – 74x599

Part number 		Units Description Input Output Pins Datasheet
74x500 1 6-bit flash analog-to-digital converter (ADC) analog 24 74F500
74x502 1 8-bit successive approximation register 16 74LS502
74x503 1 8-bit successive approximation register with expansion control 16 74LS503
74x504 1 12-bit successive approximation register with expansion control 24 74LS504
74x505 1 8-bit successive approximation ADC analog three-state 24 74F505
74x508 1 8-bit multiplier/divider 24 SN74S508
74x515 1 programmable mapping decoder (2-to-4 line decoder with 9 programmable enable inputs) 20 74HCT515[9]: 310 
74x516 1 16-bit multiplier/divider 24 SN74S516
74x518 1 8-bit comparator 20 kΩ pull-up open-collector 20 SN74ALS518
74x519 1 8-bit comparator open-collector 20 SN74ALS519
74x520 1 8-bit comparator, inverting output 20 kΩ pull-up 20 SN74ALS520
74x521 1 8-bit comparator, inverting output 20 SN74ALS521
74x522 1 8-bit comparator, inverting output 20 kΩ pull-up open-collector 20 SN74ALS522
74x524 1 8-bit registered comparator open-collector 20 74F524
74x525 1 16-bit programmable counter 28 74F525
74x526 1 fuse programmable identity comparator, 16-bit 20 SN74ALS526
74x527 1 fuse programmable identity comparator, 8-bit + 4-bit conventional Identity comparator 20 SN74ALS527
74x528 1 fuse programmable Identity comparator, 12-bit 16 SN74ALS528
74x531 8 octal transparent latch three-state 20 SN74S531
74x532 8 octal register three-state 20 SN74S532
74x533 1 octal D-type transparent latch, inverting outputs three-state 20 SN74ALS533A
74x534 1 octal D-type edge-triggered flip-flop, inverting outputs three-state 20 SN74ALS534A
74x535 1 octal transparent latch, inverting outputs three-state 20 SN74S535
74x536 1 octal register, inverting outputs three-state 20 SN74S536
74x537 1 BCD to decimal decoder three-state 20 MC74F537
74x538 1 3-to-8 line decoder/demultiplexer three-state 20 SN74ALS538
74x539 2 dual 2-to-4 line decoder/demultiplexer three-state 20 SN74ALS539
74x540 1 octal buffer, inverting outputs Schmitt trigger three-state 20 SN74LS540
74x541 1 octal buffer, non-inverting outputs Schmitt trigger three-state 20 SN74LS541
74x543 1 octal registered transceiver, non-inverting three-state 24 SN74F543
74x544 1 octal registered transceiver, inverting three-state 24 MC74F544
74x545 1 octal bidirectional transceiver, non-inverting three-state 20 74F545
74x546 1 8-bit bidirectional registered transceiver, non-inverting three-state 24 SN74LS546
74LS547 1 8-bit bidirectional latched transceiver, non-inverting three-state 24 SN74LS547
74F547 1 3-to-8 line decoder/demultiplexer with address latches and acknowledge output 20 74F547
74LS548 1 8-bit two-stage pipelined register three-state 24 SN74LS548
74F548 1 3-to-8 line decoder/demultiplexer with acknowledge output 20 74F548
74x549 1 8-bit two-stage pipelined latch three-state 24 SN74LS549
74x550 1 octal registered transceiver with status flags, non-inverting three-state 28 74F550
74x551 1 octal registered transceiver with status flags, inverting three-state 28 74F551
74x552 1 octal registered transceiver with parity and flags three-state 28 74F552
74x556 1 16x16-bit multiplier slice three-state (84) 74S556
74x557 1 8-bit by 8-bit multiplier three-state 40 SN74S557
74x558 1 8-bit by 8-bit multiplier three-state 40 SN74S558
74x559 1 8-bit expandable two's complement multiplier/divider three-state 24 74F559
74x560 1 4-bit decade counter three-state 20 SN74ALS560A
74x561 1 synchronous 4-bit binary counter three-state 20 SN74ALS561A
74x563 1 octal D-type transparent latch, inverting outputs three-state 20 SN74ALS563B
74x564 1 octal D-type edge-triggered flip-flop, inverting outputs three-state 20 SN74ALS564B
74x566 1 8-bit bidirectional registered transceiver, inverting three-state 24 SN74LS566
74x567 1 8-bit bidirectional latched transceiver, inverting three-state 24 SN74LS567
74x568 1 decade up/down counter three-state 20 SN74ALS568A
74x569 1 binary up/down counter three-state 20 SN74ALS569A
74x570 1 2048-bit PROM (512x4) open-collector 16 DM74S570
74x571 1 2048-bit PROM (512x4) three-state 16 DM74S571
74x572 1 4096-bit PROM (1024x4) open-collector 18 DM74S572
74x573 1 octal D-type transparent latch three-state 20 SN74ALS573C
74x574 1 octal D-type edge-triggered flip-flop three-state 20 SN74ALS574B
74x575 1 octal D-type edge-triggered flip-flop, synchronous clear three-state 24 SN74ALS575A
74x576 1 octal D-type edge-triggered flip-flop, inverting outputs three-state 20 SN74ALS576B
74x577 1 octal D-type edge-triggered flip-flop, synchronous clear, inverting outputs three-state 24 SN74ALS577A
74x579 1 8-bit bidirectional binary counter three-state 20 MC74F579
74x580 1 octal D-type transparent latch, inverting outputs three-state 20 SN74ALS580B
74x582 1 4-bit BCD arithmetic logic unit 24 74F582
74x583 1 4-bit BCD adder 16 74F583
74x588 1 octal bidirectional transceiver with IEEE-488 termination resistors three-state 20 74F588
74x589 1 8-bit shift register, input latch three-state 16 SN74LS589
74x590 1 8-bit binary counter, output registers three-state 16 SN74LS590
74x591 1 8-bit binary counter, output registers open-collector 16 SN74LS591
74x592 1 8-bit binary counter, input registers 16 SN74LS592
74x593 1 8-bit binary counter, input registers three-state 20 SN74LS593
74x594 1 8-bit shift registers, serial-in, parallel-out, output latches buffered 16 SN74LS594
74x595 1 8-bit shift registers, serial-in, parallel-out, output latches, output enable three-state 16 SN74LS595
74x596 1 8-bit shift registers, serial-in, parallel-out, output latches, output enable open-collector 16 SN74LS596
74x597 1 8-bit shift registers, parallel-in, serial-out, input latches 16 SN74LS597
74x598 1 8-bit shift register, selectable parallel-in/out input latches three-state 20 SN74LS598
74x599 1 8-bit shift registers, serial-in, parallel-out, output latches open-collector 16 SN74LS599

74x600 – 74x699

Part number 		Units Description Input Output Pins Datasheet
74x600 1 dynamic memory refresh controller, transparent and burst modes, for 4K or 16K dRAM three-state 20 SN74LS600A
74x601 1 dynamic memory refresh controller, transparent and burst modes, for 64K dRAM three-state 20 SN74LS601A
74x602 1 dynamic memory refresh controller, cycle steal and burst modes, for 4K or 16K dRAM three-state 20 SN74LS602A
74x603 1 dynamic memory refresh controller, cycle steal and burst modes, for 64K dRAM three-state 20 SN74LS603A
74x604 1 octal 2-input multiplexer, latch, high-speed three-state 28 SN74LS604
74x605 1 octal 2-input multiplexer, latch, high-speed open-collector 28 SN74LS605
74x606 1 octal 2-input multiplexer, latch, glitch-free three-state 28 SN74LS606
74x607 1 octal 2-input multiplexer, latch, glitch-free open-collector 28 SN74LS607
74x608 1 memory cycle controller 16 SN74LS608
74x610 1 memory mapper, latched three-state 40 SN74LS610
74x611 1 memory mapper, latched open-collector 40 SN74LS611
74x612 1 memory mapper three-state 40 SN74LS612
74x613 1 memory mapper open-collector 40 SN74LS613
74x614 1 octal bus transceiver and register, inverting open-collector 24 SN74ALS614
74x615 1 octal bus transceiver and register, non-inverting open-collector 24 SN74ALS615
74x616 1 16-bit parallel error detection and correction three-state 40 SN74ALS616
74x617 1 16-bit parallel error detection and correction open-collector 40 SN74ALS617
74x620 1 octal bus transceiver, inverting three-state 20 SN74LS620
74x621 1 octal bus transceiver, non-inverting open-collector 20 SN74LS621
74x622 1 octal bus transceiver, inverting open-collector 20 SN74LS622
74x623 1 octal bus transceiver, non-inverting three-state 20 SN74LS623
74x624 1 voltage-controlled oscillator, enable control, range control, two-phase outputs analog 14 SN74LS624
74x625 2 dual voltage-controlled oscillator, two-phase outputs analog 16 SN74LS625
74x626 2 dual voltage-controlled oscillator, enable control, two-phase outputs analog 16 SN74LS626
74x627 2 dual voltage-controlled oscillator analog 14 SN74LS627
74x628 1 voltage-controlled oscillator, enable control, range control,
external temperature compensation, two-phase outputs 		analog 14 SN74LS628
74x629 2 dual voltage-controlled oscillator, enable control, range control analog 16 SN74LS629
74x630 1 16-bit error detection and correction (EDAC) three-state 28 SN74LS630
74x631 1 16-bit error detection and correction open-collector 28 SN74LS631
74x632 1 32-bit parallel error detection and correction, byte-write three-state 52 SN74ALS632
74x633 1 32-bit parallel error detection and correction, byte-write open-collector 52 SN74ALS633
74x634 1 32-bit parallel error detection and correction three-state 48 SN74ALS634
74x635 1 32-bit parallel error detection and correction open-collector 48 SN74ALS635
74x636 1 8-bit parallel error detection and correction three-state 20 SN74LS636
74x637 1 8-bit parallel error detection and correction open-collector 20 SN74LS637
74x638 1 octal bus transceiver, inverting outputs three-state and open-collector 20 SN74LS638
74x639 1 octal bus transceiver, non-inverting outputs three-state and open-collector 20 SN74LS639
74x640 1 octal bus transceiver, inverting outputs three-state 20 SN74LS640
74x641 1 octal bus transceiver, non-inverting outputs open-collector 20 SN74LS641
74x642 1 octal bus transceiver, inverting outputs open-collector 20 SN74LS642
74x643 1 octal bus transceiver, mix of inverting and non-inverting outputs three-state 20 SN74LS643
74x644 1 octal bus transceiver, mix of inverting and non-inverting outputs open-collector 20 SN74LS644
74x645 1 octal bus transceiver, non-inverting outputs three-state 20 SN74LS645
74x646 1 octal bus transceiver/latch/multiplexer, non-inverting outputs three-state 24 SN74ALS646A
74x647 1 octal bus transceiver/latch/multiplexer, non-inverting outputs open-collector 24 SN74LS647
74x648 1 octal bus transceiver/latch/multiplexer, inverting outputs three-state 24 SN74ALS648A
74x649 1 octal bus transceiver/latch/multiplexer, inverting outputs open-collector 24 SN74LS649
74x651 1 octal bus transceiver/register, inverting outputs three-state 24 SN74ALS651A
74x652 1 octal bus transceiver/register, non-inverting outputs three-state 24 SN74ALS652A
74x653 1 octal bus transceiver/register, inverting outputs three-state and open-collector 24 SN74ALS653
74x654 1 octal bus transceiver/register, non-inverting outputs three-state and open-collector 24 SN74ALS654
74x655 1 octal buffer / line driver with parity, inverting three-state 24 74F655
74x656 1 octal buffer / line driver with parity, non-inverting three-state 24 74F656
74x657 1 octal bidirectional transceiver with 8-bit parity generator/checker three-state 24 SN74F657
74x658 1 octal bus transceiver, parity, inverting three-state 24 SN74HC658
74x659 1 octal bus transceiver, parity, non-inverting three-state 24 SN74HC659
74x664 1 octal bus transceiver, parity, inverting three-state 24 SN74HC664
74x665 1 octal bus transceiver, parity, non-inverting three-state 24 SN74HC665
74x666 1 8-bit D-type transparent read-back latch, non-inverting three-state 24 SN74ALS666
74x667 1 8-bit D-type transparent read-back latch, inverting three-state 24 SN74ALS667
74x668 1 synchronous 4-bit decade up/down counter 16 SN74LS668
74x669 1 synchronous 4-bit binary up/down counter 16 SN74LS669
74x670 1 16-bit register file (4x4) three-state 16 SN74LS670
74x671 1 4-bit bidirectional shift register/latch/multiplexer, direct clear three-state 20 SN74LS671
74x672 1 4-bit bidirectional shift register/latch/multiplexer, synchronous clear three-state 20 SN74LS672
74x673 1 16-bit serial-in, serial/parallel-out shift register, output storage registers three-state 24 SN74LS673
74x674 1 16-bit parallel-in, serial-out shift register three-state 24 SN74LS674
74x675 1 16-bit serial-in, serial/parallel-out shift register 24 74F675A
74x676 1 16-bit serial/parallel-in, serial-out shift register 24 74F676
74x677 1 16-bit address comparator, enable 24 SN74ALS677
74x678 1 16-bit address comparator, latch 24 SN74ALS678
74x679 1 12-bit address comparator, latch 20 SN74ALS679
74x680 1 12-bit address comparator, enable 20 SN74ALS680
74x681 1 4-bit parallel binary accumulator three-state 20 SN74LS681
74x682 1 8-bit magnitude comparator, P>Q output 20 kΩ pull-up 20 SN74LS682
74x683 1 8-bit magnitude comparator, P>Q output 20 kΩ pull-up open-collector 20 SN74LS683
74x684 1 8-bit magnitude comparator, P>Q output 20 SN74LS684
74x685 1 8-bit magnitude comparator, P>Q output open-collector 20 SN74LS685
74x686 1 8-bit magnitude comparator, P>Q output, enable 24 SN74LS686
74x687 1 8-bit magnitude comparator, P>Q output, enable open-collector 24 SN74LS687
74x688 1 8-bit magnitude comparator, enable 20 SN74LS688
74x689 1 8-bit magnitude comparator, enable open-collector 20 SN74LS689
74x690 1 4-bit decimal counter/latch/multiplexer, asynchronous clear three-state 20 SN74LS690
74x691 1 4-bit binary counter/latch/multiplexer, asynchronous clear three-state 20 SN74LS691
74x692 1 4-bit decimal counter/latch/multiplexer, synchronous clear three-state 20 SN74LS692
74x693 1 4-bit binary counter/latch/multiplexer, synchronous clear three-state 20 SN74LS693
74x694 1 4-bit decimal counter/latch/multiplexer, synchronous and asynchronous clears three-state 20 SN74ALS694
74x695 1 4-bit binary counter/latch/multiplexer, synchronous and asynchronous clears three-state 20 SN74ALS695
74x696 1 4-bit decimal counter/register/multiplexer, asynchronous clear three-state 20 SN74LS696
74x697 1 4-bit binary counter/register/multiplexer, asynchronous clear three-state 20 SN74LS697
74x698 1 4-bit decimal counter/register/multiplexer, synchronous clear three-state 20 SN74LS698
74x699 1 4-bit binary counter/register/multiplexer, synchronous clear three-state 20 SN74LS699

74x700 – 74x799

Part number 		Units Description Input Output Pins Datasheet
74x700 1 octal dRAM driver, inverting three-state 20 SN74S700
74x701 1 8-bit register/counter/comparator three-state 24 74F701
74x702 1 8-bit registered read-back transceiver three-state 24 74F702
74x705 1 arithmetic logic unit for digital signal processing applications three-state (84) 74ACT705
74x707 1 8-bit TTL-ECL shift register 20 74F707
74x708 1 576-bit FIFO memory (64x9) three-state 28 74ACT708
74x710 1 8-bit single-supply TTL-ECL shift register 20 74F710
74x711 5 quint 2-to-1 multiplexers three-state 20 74F711
74x712 5 quint 3-to-1 multiplexers 24 74F712
74x715 1 programmable video sync generator 20 74ACT715
74x716 1 programmable decade counter 16 SN74LS716
74x718 1 programmable binary counter 16 SN74LS718
74x723 1 576-bit FIFO memory (64x9) three-state 28 74ACT723
74x724 1 voltage-controlled multivibrator analog 8 SN74LS724
74x725 1 4608-bit FIFO memory (512x9) three-state 28 74ACT725
74x730 1 octal dRAM driver, inverting three-state 20 SN74S730
74x731 1 octal dRAM driver, non-inverting three-state 20 SN74S731
74x732 1 4-bit 3-bus multiplexer, inverting three-state 20 74F732
74x733 1 4-bit 3-bus multiplexer, non-inverting three-state 20 74F733
74x734 1 octal dRAM driver, non-inverting three-state 20 SN74S734
74x740 2 dual 4-bit line driver, inverting three-state 20 SN74S740
74x741 2 dual 4-bit line driver, non-inverting, complementary enable inputs three-state 20 SN74S741
74x742 1 octal line driver, inverting open-collector 20 SN74ALS742[10]: 3-122  [11]: 25 
74x743 1 octal line driver, non-inverting open-collector 20 SN74ALS743[10]: 3-124  [11]: 25 
74x744 2 dual 4-bit line driver, non-inverting three-state 20 SN74S744
74x746 1 octal buffer / line driver, inverting 20 kΩ pull-up three-state 20 SN74ALS746
74x747 1 octal buffer / line driver, non-inverting 20 kΩ pull-up three-state 20 SN74ALS747
74x748 1 8 to 3-line priority encoder (glitch-less) 16 SN74LS748
74x756 1 octal buffer/line driver, inverting outputs open-collector 20 SN74AS756
74x757 1 octal buffer/line driver, non-inverting outputs, complementary enable inputs open-collector 20 SN74AS757
74x758 1 quadruple bus transceivers, inverting outputs open-collector 14 SN74AS758
74x759 1 quadruple bus transceivers, non-inverting outputs open-collector 14 SN74AS759
74x760 1 octal buffer/line driver, non-inverting outputs open-collector 20 SN74ALS760
74x762 1 octal buffer/line driver, inverting and non-inverting outputs open-collector 20 SN74ALS762
74x763 1 octal buffer/line driver, inverting outputs, complementary enable inputs open-collector 20 SN74ALS763
74x764 1 dual-port dRAM controller 40 74F764
74x765 1 dual-port dRAM controller with address latch 40 74F765
74x776 1 8-bit latched transceiver for FutureBus three-state and open-collector 28 SN74F776
74x777 3 triple latched transceiver three-state and open-collector 20 74F777
74x779 1 8-bit bidirectional binary counter three-state 16 MC74F779
74x783 1 synchronous address multiplexer for display systems 40 SN74LS783
74x784 1 8-bit serial/parallel multiplier with adder/subtractor 20 74F784
74x785 1 synchronous address multiplexer for display systems with 256-column refresh 40 SN74LS785
74x786 1 4-input asynchronous bus arbiter 16 74F786
74x790 1 error detection and correction (EDAC) three-state 48 SN74ALS790
74x793 1 8-bit latch, readback 20 SN74LS793
74x794 1 8-bit register, readback 20 SN74LS794
74x795 1 octal buffer, non-inverting, common enable three-state 20 SN74LS795
74x796 1 octal buffer, inverting, common enable three-state 20 SN74LS796
74x797 1 octal buffer, non-inverting, enable for 4 buffers each three-state 20 SN74LS797
74x798 1 octal buffer, inverting, enable for 4 buffers each three-state 20 SN74LS798

74x800 – 74x899

Part number 		Units Description Input Output Pins Datasheet
74x800 3 triple 4-input AND/NAND drivers driver 20 SN74AS800
74x802 3 triple 4-input OR/NOR drivers driver 20 SN74AS802
74x803 4 quad D flip flops with matched propagation delays 14 MC74F803
74x804 6 hex 2-input NAND drivers driver 20 SN74ALS804A
74x805 6 hex 2-input NOR drivers driver 20 SN74ALS805A
74x807 1 1-to-10 clock driver driver 20 IDT74FCT807
74x808 6 hex 2-input AND drivers driver 20 SN74AS808B
74x810 4 quad 2-input XNOR gates 14 SN74ALS810
74x811 4 quad 2-input XNOR gates open-collector 14 DM74ALS811
74x817 1 GTL+ to LV-TTL 1-to-6 fanout / LV-TTL to GTL+ 1-to-2 fanout driver three-state and open-collector (24) SN74GTLP817
74x818 1 8-bit diagnostic register three-state 24 74ACT818
74x819 1 8-bit diagnostic / pipeline register three-state 24 SN74ALS819
74x821 1 10-bit bus interface flip-flop three-state 24 SN74AS821A
74x822 1 10-bit bus interface flip-flop, inverting inputs three-state 24 SN74AS822
74x823 1 9-bit D-type flip-flops, clear and clock enable inputs three-state 24 SN74AS823A
74x824 1 9-bit D-type flip-flops, clear and clock enable inputs, inverting inputs three-state 24 SN74AS824
74x825 1 8-bit D-type flip-flop, clear and clock enable inputs three-state 24 SN74AS825A
74x826 1 8-bit D-type flip-flop, clear and clock enable inputs, inverting inputs three-state 24 SN74AS826
74x827 1 10-bit buffer, non-inverting three-state 24 MC74F827
74x828 1 10-bit buffer, inverting three-state 24 MC74F828
74x832 6 hex 2-input OR drivers driver 20 SN74ALS832A
74x833 1 8-bit to 9-bit bus transceiver with parity register, non-inverting three-state 24 SN74ABT833
74x834 1 8-bit to 9-bit bus transceiver with parity register, inverting three-state 24 IDT74FCT834
74x835 1 8-bit shift register with 2:1 input multiplexers, one input latched, serial output 24 74F835
74x839 1 field-programmable logic array 14x32x6 three-state 24 SN74PL839
74x840 1 field-programmable logic array 14x32x6 open-collector 24 SN74PL840
74x841 1 10-bit D-type flip-flop three-state 24 SN74ALS841
74x842 1 10-bit D-type flip-flop, inverting inputs three-state 24 SN74ALS842
74x843 1 9-bit D flip-flops, clear and set inputs three-state 24 SN74ALS843
74x844 1 9-bit D flip-flops, clear and set inputs, inverting inputs three-state 24 SN74ALS844
74x845 1 8-bit D flip-flops, clear and set inputs three-state 24 SN74ALS845
74x846 1 8-bit D flip-flops, clear and set inputs, inverting inputs three-state 24 SN74ALS846
74x848 1 8 to 3-line priority encoder (glitch-less) three-state 16 SN74LS848
74x850 1 1 of 16 data selector/multiplexer, clocked select three-state 28 SN74AS850
74x851 1 1 of 16 data selector/multiplexer three-state 28 SN74AS851
74x852 1 8-bit universal transceiver port controller three-state 24 SN74AS852
74x853 1 8-bit to 9-bit bus transceiver with parity latch, non-inverting three-state 24 SN74ABT853
74x854 1 8-bit to 9-bit bus transceiver with parity latch, inverting three-state 24 IDT74FCT854
74x856 1 8-bit universal transceiver port controller three-state 24 SN74AS856
74x857 6 hex 2-line to 1-line multiplexer three-state 24 SN74ALS857
74x861 1 10-bit bus transceiver, non-inverting three-state 24 SN74ABT861
74x862 1 10-bit bus transceiver, inverting three-state 24 SN74ABT862
74x863 1 9-bit bus transceiver, non-inverting three-state 24 SN74ABT863
74x864 1 9-bit bus transceiver, inverting three-state 24 74F864
74x866 1 8-bit magnitude comparator with latches 24 SN74AS866
74x867 1 synchronous 8-bit up/down counter, asynchronous clear 24 SN74ALS867A
74x869 1 synchronous 8-bit up/down counter, synchronous clear 24 SN74ALS869
74x870 1 dual 16x4 register files 24 SN74AS870
74x871 1 dual 16x4 register files 28 SN74AS871
74x873 2 dual 4-bit transparent latch with clear three-state 24 SN74ALS873B
74x874 2 dual 4-bit edge-triggered D flip-flops with clear three-state 24 SN74ALS874B
74x876 2 dual 4-bit edge-triggered D flip-flops with set, inverting outputs three-state 24 SN74ALS876A
74x877 1 8-bit universal transceiver port controller three-state 24 SN74AS877
74x878 2 dual 4-bit D-type flip-flop, synchronous clear, non-inverting outputs three-state 24 SN74ALS878
74x879 2 dual 4-bit D-type flip-flop, synchronous clear, inverting outputs three-state 24 SN74ALS879
74x880 2 dual 4-bit transparent latch with clear, inverting outputs three-state 24 SN74ALS880
74x881 1 4-bit arithmetic logic unit 24 SN74AS881A
74x882 1 32-bit lookahead carry generator 24 SN74AS882
74x885 1 8-bit magnitude comparator 24 SN74AS885
74x887 1 8-bit processor element (non-cascadable version of 74x888) (68) SN74AS887
74x888 1 8-bit processor slice 64 SN74AS888
74x889 1 8-bit processor slice (68) SN74AS889
74x890 1 microoperation sequencer 64 SN74AS890
74x891 1 microoperation sequencer (68) SN74AS891
74x895 1 8-bit memory address generator (68) SN74AS895
74x897 1 16-bit parallel/serial barrel shifter (68) SN74AS897A
74x899 1 9-bit latchable transceiver with parity generator / checker three-state (28) 74AC899

74x900 – 74x999

Part number 		Units Description Input Output Pins Datasheet
74x900 4 quad 2-input NAND gate driver 14 SN74ALS900
74x901 6 hex inverting TTL buffer 14 MM74C901
74C902 6 hex non-inverting TTL buffer 14 MM74C902
74ALS902 4 quad 2-input NOR gate driver 14 SN74ALS902
74C903 6 hex inverting PMOS buffer 14 MM74C903
74ALS903 4 quad 2-input NAND gate open-collector driver 14 SN74ALS903
74x904 6 hex non-inverting PMOS buffer 14 MM74C904
74x905 1 12-bit successive approximation register 24 MM74C905
74x906 6 hex open drain n-channel buffers open-collector 14 MM74C906
74x907 6 hex open drain p-channel buffers 14 MM74C907
74x908 2 dual 2-input NAND 30 V / 250 mA relay driver 8 MM74C908
74x909 4 quad voltage comparator analog open-collector 14 MM74C909
74x910 1 256-bit RAM (64x4) three-state 18 MM74C910
74x911 1 4-digit expandable display controller three-state 28 MM74C911
74x912 1 6-digit BCD display controller and driver three-state 28 MM74C912
74x913 1 6-digit BCD display controller and driver, no decimal point 24 MM74C913
74x914 6 hex inverter gate, extended input voltage Schmitt trigger 14 MM74C914
74x915 1 7-segment to BCD converter three-state 18 MM74C915
74x917 1 6-digit hex display controller and driver three-state 28 MM74C917
74x918 2 dual 2-input NAND 30 V / 250 mA relay driver 14 MM74C918
74x920 1 1024-bit RAM (256x4), separate data inputs and outputs three-state 22 MM74C920
74x921 1 1024-bit RAM (256x4) three-state 18 MM74C921
74x922 1 16-key encoder three-state 18 MM74C922
74x923 1 20-key encoder three-state 20 MM74C923
74x925 1 4-digit counter/display driver 16 MM74C925
74x926 1 4-digit decade counter/display driver, carry out and latch (up to 9999) 16 MM74C926
74x927 1 4-digit timer counter/display driver (up to 9599, intended as time elapsed, i.e. 9:59.9 min) 16 MM74C927
74x928 1 4-digit counter/display driver (up to 1999) 16 MM74C928
74x929 1 1024-bit RAM (1024x1), single chip select three-state 16 MM74C929
74x930 1 1024-bit RAM (1024x1), three chip selects three-state 18 MM74C930
74x932 1 phase comparator 8 MM74C932
74x933 1 7-bit address bus comparator 20 MM74C933
74934 1 ADC similar to ADC0829, see corresponding NSC datasheet
74x935 1 ADC for 3.5-digit digital voltmeters, multiplexed 7-segment display outputs analog 28 MM74C935
74x936 1 ADC for 3.75-digit digital voltmeters, multiplexed 7-segment display outputs analog MM74C936
74x937 1 ADC for 3.5-digit digital voltmeters, multiplexed BCD outputs analog 24 MM74C937
74x938 1 ADC for 3.75-digit digital voltmeters, multiplexed BCD outputs analog 24 MM74C938
74x940 1 octal bus/line drivers/line receivers Schmitt trigger three-state 20 DM74S940
74x941 1 octal bus/line drivers/line receivers Schmitt trigger three-state 20 DM74S941
74x942 1 300 baud Bell 103 modem (+/- 5 V supply) 20 MM74HC942
74x943 1 300 baud Bell 103 modem (single 5 V supply) 20 MM74HC943
74x945 1 4-digit up/down counter, decoder and LCD driver, output latch 40 MM74C945
74x946 1 4.5-digit counter, decoder and LCD driver, leading zero blanking 40 MM74C946
74x947 1 4-digit up/down counter, decoder and LCD driver, leading zero blanking 40 MM74C947
74x948 1 8-bit ADC with 16-channel analog multiplexer analog three-state 40 MM74C948
74x949 1 8-bit ADC with 8-channel analog multiplexer analog three-state 28 MM74C949
74x950 1 8-bit ADC with 8-channel analog multiplexer and sample and hold analog three-state 28 MM74C950
74x952 1 dual rank 8-bit shift register, synchronous clear three-state 18 DM74LS952
74C956 1 4-digit, 17-segment alpha-numeric LED display driver with memory and decoder 40 MM74C956
74BCT956 1 octal bus transceiver and latch three-state 24 SN74BCT956
74x962 1 dual rank 8-bit shift register, register exchange mode three-state 18 DM74LS962
74x963 1 dual rank 8-bit shift register, synchronous clear three-state 20 SN74ALS963
74x964 1 dual rank 8-bit shift register, synchronous and asynchronous clear three-state 20 SN74ALS964
74x968 1 controller/driver for 16k/64k/256k/1M dRAM 52 74F968
74x978 1 octal flip-flop with serial scanner 24 74F978
74x979 1 9-bit registered transceiver with parity generator/checker for FutureBus three-state and open-collector (48) SN74BCT979
74x989 1 64-bit RAM (64x4), inverting output three-state 16 MM74C989
74x990 1 8-bit D-type transparent read-back latch, non-inverting three-state 20 SN74ALS990
74x991 1 8-bit D-type transparent read-back latch, inverting three-state 20 SN74ALS991
74x992 1 9-bit D-type transparent read-back latch, non-inverting three-state 24 SN74ALS992
74x993 1 9-bit D-type transparent read-back latch, inverting three-state 24 SN74ALS993
74x994 1 10-bit D-type transparent read-back latch, non-inverting three-state 24 SN74ALS994
74x995 1 10-bit D-type transparent read-back latch, inverting three-state 24 SN74ALS995
74x996 1 8-bit D-type edge-triggered read-back latch three-state 24 SN74ALS996

74x1000 – 74x1999

Part number 		Units Description Input Output Pins Datasheet
74x1000 4 quad 2-input NAND gate driver 14 SN74AS1000A
74x1002 4 quad 2-input NOR gate driver 14 SN74ALS1002A
74x1003 4 quad 2-input NAND gate open-collector driver 14 SN74ALS1003A
74x1004 6 hex inverting buffer driver 14 SN74ALS1004
74x1005 6 hex inverting buffer open-collector driver 14 SN74ALS1005
74x1008 4 quad 2-input AND gate driver 14 SN74AS1008A
74ALS1010 3 triple 3-input NAND gate driver 14 SN74ALS1010A
74AC1010,
74ACT1010 		1 16x16-bit multiplier/accumulator three-state 64 74AC1010
74x1011 3 triple 3-input AND gate driver 14 SN74ALS1011A
74F1016 16 16-bit Schottky diode R-C bus termination array (20) SN74F1016
74AC1016,
74ACT1016 		1 16x16-bit multiplier three-state 64 74AC1016
74x1017 1 16x16-bit parallel multiplier three-state 64 74AC1017
74x1018 18 18-bit Schottky diode R-C bus termination array (24) SN74F1018
74x1020 2 dual 4-input NAND gate driver 14 SN74ALS1020A
74x1032 4 quad 2-input OR gate driver 14 SN74AS1032A
74x1034 6 hex non-inverting buffer driver 14 SN74ALS1034
74x1035 6 hex non-inverting buffer open-collector driver 14 SN74ALS1035
74x1036 4 quad 2-input NOR gate driver 14 SN74ALS1036
74x1050 12 12-bit Schottky diode bus termination array, clamp to GND 16 SN74S1050
74x1051 12 12-bit Schottky diode bus termination array, clamp to GND/VCC 16 SN74S1051
74x1052 16 16-bit Schottky diode bus termination array, clamp to GND 20 SN74S1052
74x1053 16 16-bit Schottky diode bus termination array, clamp to GND/VCC 20 SN74S1053
74x1056 8 8-bit Schottky diode bus termination array, clamp to GND (16) SN74F1056
74x1071 10 10-bit bus termination array with bus-hold function (14) SN74ACT1071
74x1073 16 16-bit bus termination array with bus-hold function (20) SN74ACT1073
74x1074 2 dual D negative edge triggered flip-flop, asynchronous preset and clear 14 74FR1074
74x1181 1 4-bit arithmetic logic unit 24 SN74AS1181
74x1240 1 octal buffer / line driver, inverting (lower-power version of 74x240) three-state 20 SN74ALS1240
74x1241 1 octal buffer / line driver, non-inverting (lower-power version of 74x241) three-state 20 SN74ALS1241
74x1242 1 quad bus transceiver, inverting (lower-power version of 74x242) three-state 14 SN74ALS1242
74x1243 1 quad bus transceiver, non-inverting (lower-power version of 74x243) three-state 14 SN74ALS1243
74x1244 1 octal buffer / driver, non-inverting (lower-power version of 74x244) three-state 20 SN74ALS1244
74x1245 1 octal bus transceiver (lower-power version of 74x245) three-state 20 SN74ALS1245A
74x1280 1 9-bit parity generator/checker with registered outputs three-state 20 QS74FCT1280
74x1284 1 parallel printer interface transceiver / buffer (IEEE 1284) 20 74HCT1284
74x1394 1 2-bit GTLP transceiver with split LV-TTL port three-state and open-collector (16) SN74GTLP1394
74x1395 2 Dual 1-bit GTLP transceiver with split LV-TTL port three-state and open-collector (20) SN74GTLP1395
74x1403 1 8-bit bus receiver plus 4-bit bus driver Schmitt trigger three-state (32) 74LVT1403
74x1404 1 oscillator driver Schmitt trigger (8) SN74LVC1404
74x1604 1 dual 8-bit transparent latch with output multiplexer 28 74F1604
74x1612 1 18-bit LV-TTL-to-GTLP adjustable-edge-rate universal bus transceiver three-state and open-collector (64) SN74GTLPH1612
74ALS1616 1 16x16-bit multimode multiplier three-state 64 SN74ALS1616
74GTLPH1616 1 17-bit LV-TTL-to-GTLP adjustable-edge-rate universal bus transceiver with buffered clock outputs three-state and open-collector (64) SN74GTLPH1616
74x1620 1 octal bus transceiver, inverting three-state 20 SN74ALS1620
74x1621 1 octal bus transceiver, non-inverting open-collector 20 SN74ALS1621
74x1622 1 octal bus transceiver, inverting open-collector 20 SN74ALS1622
74x1623 1 octal bus transceiver, non-inverting three-state 20 SN74ALS1623
74x1627 1 18-bit LV-TTL-to-GTLP adjustable-edge-rate bus transceiver with source synchronous clock outputs three-state and open-collector (64) SN74GTLPH1627
74x1631 1 quad bus driver with complementary outputs three-state 16 SN74ALS1631[10]: 3-336 
74x1638 1 octal bus transceiver, inverting (lower-power version of 74x638) three-state and open-collector 20 SN74ALS1638
74x1639 1 octal bus transceiver, non-inverting (lower-power version of 74x639) three-state and open-collector 20 SN74ALS1639
74x1640 1 octal bus transceiver, inverting (lower-power version of 74x640) three-state 20 SN74ALS1640A
74x1641 1 octal bus transceiver, non-inverting (lower-power version of 74x641) open-collector 20 SN74ALS641
74x1642 1 octal bus transceiver, inverting (lower-power version of 74x642) open-collector 20 SN74ALS642
74x1643 1 octal bus transceiver, inverting and non-inverting (lower-power version of 74x643) three-state 20 SN74ALS643
74x1644 1 octal bus transceiver, inverting and non-inverting (lower-power version of 74x644) open-collector 20 SN74ALS644
74ALS1645 1 octal bus transceiver, non-inverting (lower-power version of 74x645) three-state 20 SN74ALS1645A
74GTLPH1645 1 16-bit LV-TTL-to-GTLP adjustable-edge-rate bus transceiver three-state and open-collector (56) SN74GTLPH1645
74x1650 2 dual 9-bit Futurebus universal storage transceiver with split TTL I/O three-state and open-collector (100) SN74FB1650
74x1651 2 9-bit and 8-bit Futurebus universal storage transceivers with delayed buffered clock with split TTL I/O three-state and open-collector (100) SN74FB1651
74x1653 2 9-bit and 8-bit Futurebus universal storage transceivers with delayed buffered clock with split 3.3V TTL I/O three-state and open-collector (100) SN74FB1653
74x1655 2 dual 8-bit GTL universal storage transceivers with live insertion three-state and open-collector (64) SN74GTL1655
74x1760 1 10-bit 4-way latched address multiplexer three-state 64 74F1760
74x1761 1 dRAM and interrupt vector controller 48 74F1761
74x1762 1 dRAM address controller 40 74F1762
74x1763 1 single-port dRAM controller 48 74F1763
74x1764 1 dual-port dRAM controller 48 74F1764
74x1765 1 dual-port dRAM controller with address latch 48 74F1765
74x1766 1 burst mode dRAM controller 48 74F1766
74x1779 1 8-bit bidirectional binary counter three-state 16 74F1779
74x1801 1 FM, MFM, and DM encoder / decoder, data rates up to 10 MHz 24 74LS1801
74x1802 1 SerDes with ECC and CRC, data rates up to 10 MHz three-state 48 74LS1802
74x1803 1 quad clock driver 14 MC74F1803
74x1804 6 hex 2-input NAND driver 20 DM74AS1804
74x1805 6 hex 2-input NOR driver 20 DM74AS1805
74x1808 6 hex 2-input AND driver 20 DM74AS1808
74x1811 1 FM, MFM, and DM encoder / decoder, data rates up to 20 MHz 24 74LS1811
74x1812 1 SerDes with ECC and CRC, data rates up to 30 MHz three-state 48 74LS1812
74x1821 1 10-bit bus interface flip-flops three-state 24 SN74AS1821
74x1823 1 9-bit bus interface flip-flops with clear three-state 24 SN74AS1823
74x1832 6 hex 2-input OR driver 20 DM74ALS1832
74x1841 1 10-bit bus interface transparent latches three-state 24 SN74AS1841
74x1843 1 9-bit bus interface transparent latches with clear three-state 24 SN74AS1843

74x2000 – 74x2999

Part number 		Units Description Input Output Pins Datasheet
74x2000 1 direction discriminator with microprocessor interface three-state 28 SN74LS2000
74x2003 1 8-bit level translator (20) SN74GTL2003
74x2006 1 13-bit GTL to 3.3V TTL level translator open-collector (28) SN74GTL2006
74x2007 1 12-bit GTL to 3.3V TTL level translator open-collector (28) SN74GTL2007
74x2010 1 10-bit level translator (24) SN74GTL2010
74x2014 1 4-bit GTL to TTL transceiver three-state and open-collector (14) SN74GTL2014
74x2031 1 9-bit Futurebus address/data transceiver three-state and open-collector (48) SN74FB2031
74x2032 1 9-bit Futurebus competition transceiver three-state and open-collector (48) SN74FB2032
74FB2033 1 8-bit Futurebus registered transceiver with split TTL I/O three-state and open-collector (52) SN74FB2033
74GTLP2033 1 8-bit GTLP registered transceiver with split LV-TTL I/O three-state and open-collector (48) SN74GTLP2033
74x2034 1 8-bit GTLP adjustable-edge-rate registered transceiver with split LV-TTL I/O three-state and open-collector (48) SN74GTLP2034
74x2040 1 8-bit Futurebus transceiver with split TTL I/O three-state and open-collector (48) SN74FB2040
74x2041 1 7-bit Futurebus transceiver with split TTL I/O three-state and open-collector (52) SN74FB2041
74x2107 1 12-bit GTL to 3.3V TTL level translator open-collector (28) SN74GTL2107
74x2125 4 quad bus buffer three-state, 25 Ω series resistor (14) TC74VCX2125
74x2140 1 8k x 18 cache data RAM three-state (52) SN74ACT2140A
74x2150 1 512 x 8 cache address comparator 24 SN74ACT2150A
74ACT2151 1 1k x 11 cache address comparator 28 SN74ACT2151
74FCT2151 1 8-line to 1-line multiplexer 25 Ω series resistor (16) CD74FCT2151
74x2152 1 2k x 8 cache address comparator 28 SN74ACT2152A
74ACT2153 1 1k x 11 cache address comparator open-collector 28 SN74ACT2153
74FCT2153 2 dual 4-line to 1-line multiplexer 25 Ω series resistor (16) CD74FCT2153
74x2154 1 2k x 8 cache address comparator open-collector 28 SN74ACT2154A
74x2155 1 2k x 8 burst cache address comparator three-state (44) SN74ACT2155
74x2156 1 16k x 4 burst cache address comparator three-state (44) SN74ACT2156
74ACT2157 1 2k x 16 cache address comparator three-state (44) SN74ACT2157
74FCT2157 4 quad 2-line to 1-line multiplexer 25 Ω series resistor (16) CD74FCT2157
74x2158 1 8k x 9 cache address comparator three-state (44) SN74ACT2158
74x2159 1 8k x 9 cache address comparator three-state (44) SN74ACT2159
74x2160 1 8k x 4 2-way cache address comparator three-state (32) SN74ACT2160
74x2161 1 synchronous presettable 4-bit binary counter, asynchronous clear 25 Ω series resistor 16 QS74FCT2161T
74ACT2163,
74BCT2163 		1 16k x 5 cache address comparator three-state (32) SN74ACT2163
74FCT2163 1 synchronous presettable 4-bit binary counter, synchronous clear 25 Ω series resistor 16 QS74FCT2163T
74x2164 1 16k x 5 cache address comparator three-state (32) SN74ACT2164
74x2166 1 16k x 5 cache address comparator with input latches three-state (32) SN74BCT2166
74x2191 1 synchronous presettable 4-bit binary up/down counter, common clock 25 Ω series resistor 16 QS74FCT2191T
74x2193 1 synchronous presettable 4-bit binary counter, separate up/down clocks 25 Ω series resistor 16 QS74FCT2193T
74x2226 2 dual 64-bit FIFO memories (64x1) (24) SN74ACT2226
74x2227 2 dual 64-bit FIFO memories (64x1) three-state (28) SN74ACT2227
74x2228 2 dual 256-bit FIFO memories (256x1) (24) SN74ACT2228
74x2229 2 dual 256-bit FIFO memories (256x1) three-state (28) SN74ACT2229
74x2232 1 512-bit FIFO memory (64x8) three-state 24 SN74ALS2232A
74x2233 1 576-bit FIFO memory (64x9) three-state 28 SN74ALS2233A
74x2235 1 18432-bit bidirectional FIFO memory (2x1024x9) three-state (44) SN74ACT2235
74x2236 1 18432-bit bidirectional FIFO memory (2x1024x9) three-state (44) SN74ACT2236
74x2238 1 576-bit bidirectional FIFO memory (2x32x9) three-state 40 SN74ALS2238
74x2240 2 dual 4-bit bidirectional buffer / line driver, inverting three-state, 25 Ω series resistor 20 SN74BCT2240
74x2241 2 dual 4-bit bidirectional buffer / line driver, non-inverting three-state, 25 Ω series resistor 20 SN74BCT2241
74x2242 1 4-bit bus transceiver, inverting three-state, 25 Ω series resistor 14 SN74ALS2242
74x2243 1 4-bit bus transceiver, non-inverting three-state, 25 Ω series resistor (14) 74F2243
74x2244 2 dual 4-bit buffer / line driver, non-inverting three-state, 25 Ω series resistor 20 SN74BCT2244
74x2245 1 octal bus transceiver three-state, 25 Ω series resistor 20 SN74ABT2245
74x2253 2 dual 4-line to 1-line multiplexer three-state, 25 Ω series resistor (16) CD74FCT2253
74x2257 4 quad 2-line to 1-line multiplexer three-state, 25 Ω series resistor (16) CD74FCT2257
74x2273 8 octal D-type flip-flop with common clock and reset 25 Ω series resistor (20) CD74FCT2273
74x2299 1 8-bit universal shift register three-state, 25 Ω series resistor 20 QS74FCT2299T
74x2323 2 dual line receiver analog (8) SN74LS2323
74x2373 1 8-bit transparent latch three-state, 25 Ω series resistor (20) CD74FCT2373
74x2374 8 octal D-type flip-flop with common clock three-state, 25 Ω series resistor (20) CD74FCT2374
74x2377 1 8-bit register with clock enable 25 Ω series resistor 20 QS74FCT2377T
74x2400 2 dual 4-bit buffer, inverting Schmitt trigger three-state 20 74THC2400
74x2410 1 11-bit MOS memory driver, non-inverting three-state, 25 Ω series resistor 28 SN74BCT2410
74x2411 1 11-bit MOS memory driver, inverting three-state, 25 Ω series resistor 28 SN74BCT2411
74x2414 2 dual 2-to-4 line decoder with supply voltage monitor 20 SN74BCT2414
74x2420 1 16-bit NuBus address/data transceiver and register three-state (68) SN74BCT2420
74x2423 1 16-bit latched multiplexer/demultiplexer NuBus transceiver, inverting three-state (68) SN74BCT2423
74x2424 1 16-bit latched multiplexer/demultiplexer NuBus transceiver, non-inverting three-state (68) SN74BCT2424
74x2425 1 Macintosh Coprocessor Platform NuBus address/data registered transceiver three-state (100) SN74BCT2425
74x2440 1 NuBus interface controller (68) SN74ACT2440
74x2441 1 NuBus interface controller (100) SN74ACT2441
74x2442 1 NuBus block slave address generator three-state (20) SN74ALS2442
74x2509 1 9-output clock driver with PLL three-state (24) HD74CDC2509
74x2510 1 10-output clock driver with PLL three-state (24) HD74CDC2510
74x2525 1 8-output clock driver 14 74AC2525
74x2526 1 8-output clock driver with input multiplexer 16 74AC2526
74x2533 1 8-bit bus interface latch, inverting three-state, 25 Ω series resistor 20 QS74FCT2533T
74x2534 1 8-bit bus interface register, inverting three-state, 25 Ω series resistor 20 QS74FCT2534T
74x2540 1 8-bit buffer / line driver, inverting three-state, 25 Ω series resistor 20 SN74ALS2540
74x2541 1 8-bit buffer / line driver, non-inverting three-state, 25 Ω series resistor 20 SN74ALS2541
74x2543 1 8-bit latched transceiver, non-inverting three-state, 25 Ω series resistor 24 QS74FCT2543T
74x2544 1 8-bit latched transceiver, inverting three-state, 25 Ω series resistor 24 QS74FCT2544T
74x2573 1 8-bit transparent latch three-state, 25 Ω series resistor 20 QS74FCT2573T
74x2574 8 octal D-type flip-flop with common clock three-state, 25 Ω series resistor 20 QS74FCT2574T
74x2620 1 octal bus transceiver / MOS driver, inverting three-state, 25 Ω series resistor 20 SN74AS2620
74x2623 1 octal bus transceiver / MOS driver, non-inverting three-state, 25 Ω series resistor 20 SN74AS2623
74x2640 1 octal bus transceiver / MOS driver, inverting three-state, 25 Ω series resistor 20 SN74AS2640
74x2643 1 octal bus transceiver, mix of inverting and non-inverting outputs three-state, 25 Ω series resistor 20 74F2643
74x2645 1 octal bus transceiver / MOS driver, non-inverting three-state, 25 Ω series resistor 20 SN74AS2645
74x2646 1 octal registered transceiver, non-inverting three-state, 25 Ω series resistor 24 QS74FCT2646T
74x2648 1 octal registered transceiver, inverting three-state, 25 Ω series resistor 24 QS74FCT2648T
74x2651 1 octal registered transceiver, inverting three-state, 25 Ω series resistor 24 QS74FCT2651T
74x2652 1 octal registered transceiver, non-inverting three-state, 25 Ω series resistor 24 QS74FCT2652T
74S2708 1 8192-bit PROM (1024x8) three-state 24 SN74S2708
74AC2708 1 576-bit FIFO memory (64x9) three-state 28 74AC2708
74x2725 1 4608-bit FIFO memory (512x9) 28 74ACT2725
74x2726 1 4608-bit bidirectional FIFO memory (512x9) 28 74ACT2726
74x2821 1 10-bit D-type flip-flop three-state, 25 Ω series resistor 24 QS74FCT2821T
74x2823 1 9-bit D-type flip-flop with clear three-state, 25 Ω series resistor 24 QS74FCT2823T
74x2825 1 8-bit D-type flip-flop with clear and clock enable three-state, 25 Ω series resistor 24 QS74FCT2825T
74x2827 1 10-bit buffer, non-inverting three-state, 25 Ω series resistor 24 SN74BCT2827A
74x2828 1 10-bit buffer, inverting three-state, 25 Ω series resistor 24 SN74BCT2828A
74x2833 1 8-bit bus transceiver with parity error flip-flop three-state, 25 Ω series resistor 24 QS74FCT2833T
74x2841 1 10-bit transparent latch three-state, 25 Ω series resistor 24 QS74FCT2841T
74x2843 1 9-bit transparent latch with asynchronous reset three-state, 25 Ω series resistor 24 QS74FCT2843T
74x2845 1 8-bit transparent latch with asynchronous reset and multiple output enable three-state, 25 Ω series resistor 24 QS74FCT2845T
74x2853 1 8-bit bus transceiver with parity error latch three-state, 25 Ω series resistor 24 QS74FCT2853T
74x2861 1 10-bit non-inverting bus transceiver three-state, 25 Ω series resistor 24 QS74FCT2861T
74x2862 1 10-bit inverting bus transceiver three-state, 25 Ω series resistor 24 QS74FCT2862T
74x2863 1 9-bit non-inverting bus transceiver with dual output enable three-state, 25 Ω series resistor 24 QS74FCT2863T
74x2864 1 9-bit inverting bus transceiver with dual output enable three-state, 25 Ω series resistor 24 QS74FCT2864T
74x2952 1 octal bus transceiver and register, non-inverting three-state 24 SN74LVC2952A
74x2953 1 octal bus transceiver and register, inverting three-state 24 74F2953
74x2960 1 error detection and correction (EDAC), equivalent to Am2960 three-state 48 MC74F2960
74x2961 1 4-bit EDAC bus buffer, inverting, equivalent to Am2961 three-state 24 MC74F2961A
74x2962 1 4-bit EDAC bus buffer, non-inverting, equivalent to Am2962 three-state 24 MC74F2962A
74x2967 1 controller/driver for 16k/64k/256k dRAM 48 SN74ALS2967
74x2968 1 controller/driver for 16k/64k/256k dRAM 48 SN74ALS2968
74x2969 1 memory timing controller for use with EDAC 48 MC74F2969
74x2970 1 memory timing controller for use without EDAC 24 MC74F2970

74x3000 – 74x3999

Part number 		Units Description Input Output Pins Datasheet
74x3004 1 selectable GTL voltage reference analog (6) SN74GTL3004
74x3037 4 quad 2-input NAND gate driver 30 Ω 16 74F3037
74x3038 4 quad 2-input NAND gate open-collector driver 30 Ω 16 74F3038
74x3040 2 dual 4-input NAND gate driver 30 Ω 16 74F3040
74x3125 4 quad FET bus switch, output enable active low (14) SN74CBT3125
74x3126 4 quad FET bus switch, output enable active high (14) SN74CBT3126
74FCT3244 2 dual 4-bit buffer / line driver three-state 20 IDT74FCT3244
74CBT3244,
74FST3244 		2 dual 4-bit FET bus switch 20 SN74CBT3244
IDT74FST3244
74FCT3245 1 octal bidirectional transceiver three-state 20 IDT74FCT3245
74CBT3245,
74FST3245 		1 octal FET bus switch 20 SN74CBT3245A
IDT74FST3245
74LVX3245 1 octal bidirectional voltage-translating transceiver three-state (24) 74LVX3245
74GTLPH3245 1 32-bit LV-TTL-to-GTLP adjustable-edge-rate bus transceiver three-state and open-collector (114) SN74GTLPH3245
74x3251 1 8-line to 1-line FET multiplexer / demultiplexer (16) SN74CBT3251
74x3253 2 dual 4-line to 1-line FET multiplexer / demultiplexer (16) SN74CBT3253
74x3257 4 quad 2-line to 1-line FET multiplexer / demultiplexer (16) IDT74FST3257
74x3283 1 32-bit latchable transceiver with parity checker / generator three-state (120) 74ACTQ3283
74x3284 1 18-bit synchronous datapath multiplexer three-state (100) 74ABT3284
74x3305 2 dual FET bus switch with extended voltage range (8) SN74CBT3305C
74x3306 2 dual FET bus switch (8) SN74CBT3306
74x3345 1 octal FET bus switch, dual output enable (20) SN74CBT3345
74x3374 1 8-bit metastable-resistant D-type flip-flop three-state 20 SN74AS3374
74x3383 1 5-bit 4-port FET bus exchange switch 24 IDT74FST3383
74x3384 2 dual 5-bit FET bus switch 24 IDT74FST3384
74x3386 1 5-bit 4-port FET bus exchange switch with extended voltage range (24) SN74CBT3386
74x3390 1 octal 2-line to 1-line FET multiplexer / bus switch (28) IDT74FST3390
74x3573 1 octal transparent latch three-state 20 IDT74FCT3573
74x3574 1 octal D-type flip flop three-state 20 IDT74FCT3574
74x3584 2 dual 5-bit FET bus switch 25 Ω series resistor 24 QS74QST3584
74x3611 1 2304-bit FIFO memory (64x36) three-state (120) SN74ABT3611
74x3612 1 4608-bit bidirectional FIFO memory (2x64x36) three-state (120) SN74ABT3612
74x3613 1 2304-bit FIFO memory (64x36) three-state (120) SN74ABT3613
74x3614 1 4608-bit bidirectional FIFO memory (2x64x36) three-state (120) SN74ABT3614
74x3622 1 18432-bit bidirectional FIFO memory (2x256x36) three-state (120) SN74ACT3622
74x3631 1 18432-bit FIFO memory (512x36) three-state (120) SN74ACT3631
74x3632 1 36864-bit bidirectional FIFO memory (2x512x36) three-state (120) SN74ACT3632
74x3638 1 32768-bit bidirectional FIFO memory (2x512x32) three-state (120) SN74ACT3638
74x3641 1 36864-bit FIFO memory (1024x36) three-state (120) SN74ACT3641
74x3642 1 73728-bit bidirectional FIFO memory (2x1024x36) three-state (120) SN74ACT3642
74x3651 1 73728-bit FIFO memory (2048x36) three-state (120) SN74ACT3651
74x3708 1 8192-bit PROM (1024x8) open-collector 24 SN74S3708
74x3807 1 1-to-10 clock driver driver 20 IDT74FCT3807
74x3827 1 10-bit buffer three-state 24 IDT74FCT3827
74x3861 1 10-bit FET bus switch (24) SN74CBT3861
74x3862 1 10-bit FET bus switch with dual output enable (24) IDT74CBTLV3862
74x3893 1 quad Futurebus backplane transceiver three-state and open-collector (20) MC74F3893A
74x3907 1 Pentium clock synthesizer three-state (28) IDT74FCT3907
74x3932 1 PLL-based clock driver three-state (48) IDT74FCT3932

74x4000 – 74x5999

Part number 		Units Description Input Output Pins Datasheet
74x4002 2 dual 4-input NOR gate 14 CD74HC4002
74x4015 2 dual 4-bit shift registers 16 CD74HC4015
74x4016 4 quad bilateral switch analog 14 CD74HC4016
74x4017 1 5-stage ÷10 Johnson counter 16 CD74HC4017
74x4020 1 14-stage binary counter 16 SN74HC4020
74x4022 1 4-stage ÷8 Johnson counter 14 SN74HC4022
74x4024 1 7-stage ripple carry binary counter 14 CD74HC4024
74x4028 1 BCD to decimal decoder 16 TC74HC4028P
74x4040 1 12-stage binary ripple counter 16 SN74HC4040
74x4046 1 phase-locked loop and voltage-controlled oscillator 16 CD74HC4046A
74x4049 6 hex inverting buffer 16 CD74HC4049
74x4050 6 hex buffer/converter (non-inverting) 16 CD74HC4050
74x4051 1 high-speed 8-channel analog multiplexer/demultiplexer analog 16 CD74HC4051
74x4052 2 dual 4-channel analog multiplexer/demultiplexers analog 16 CD74HC4052
74x4053 3 triple 2-channel analog multiplexer/demultiplexers analog 16 CD74HC4053
74x4059 1 programmable divide-by-N counter 24 CD74HC4059
74x4060 1 14-stage binary ripple counter with oscillator 16 SN74HC4060
74x4061 1 14-stage asynchronous binary counter with oscillator 16 SN74HC4061
74x4066 4 quad single-pole single-throw analog switch 14 SN74HC4066
74x4067 1 16-channel analog multiplexer/demultiplexer analog 24 CD74HC4067
74x4072 2 dual 4-input OR gate 14 TC74HC4072
74x4075 3 triple 3-input OR gate 14 CD74HC4075
74x4078 1 single 8-input OR/NOR gate 14 MM74HC4078
74x4094 1 8-bit three-state shift register/latch three-state 16 CD74HC4094
74x4102 1 2-digit BCD presettable synchronous down counter 16 74HC4102
74x4103 1 8-bit binary presettable synchronous down counter 16 74HC4103
74x4245 1 8-bit 3V/5V translating transceiver three-state (24) 74LVX4245
74x4301 1 8-bit latch, inverting three-state 20 MN74HC4301
74x4302 1 8-bit latch, non-inverting three-state 20 MN74HC4302
74x4303 1 8-bit D-type flip-flop, inverting outputs three-state 20 MN74HC4303
74x4304 1 8-bit D-type flip-flop, non-inverting outputs three-state 20 MN74HC4304
74x4305 2 dual 4-bit buffer, inverting three-state 20 MN74HC4305
74x4306 2 dual 4-bit buffer, non-inverting three-state 20 MN74HC4306
74x4316 4 quad analog switch analog 14 MM74HC4316
74x4351 1 8-channel analog multiplexer/demultiplexer with latch analog 20 CD74HC4351
74x4352 2 dual 4-channel analog multiplexer/demultiplexer with latch analog 20 CD74HC4352
74x4353 3 triple 2-channel analog multiplexer/demultiplexer with latch analog 20 MC74HC4353
74x4374 1 8-bit dual-rank synchronizer three-state 20 SN74AS4374
74x4503 1 controller for 64k/256k/1M dynamic RAM three-state 52 SN74ACT4503
74x4510 1 BCD decade up/down counter 16 CD74HC4510
74x4511 1 BCD to 7-segment decoder 16 CD74HC4511
74x4514 1 4-to-16 line decoder/demultiplexer, input latches 24 CD74HC4514
74x4515 1 4-to-16 line decoder/demultiplexer with input latches; inverting 24 CD74HC4515
74x4516 1 4-bit binary up/down counter 16 CD74HC4516
74x4518 2 dual 4-bit synchronous decade counter 16 CD74HC4518
74x4520 2 dual 4-bit synchronous binary counter 16 CD74HC4520
74x4538 2 dual retriggerable precision monostable multivibrator 16 CD74HC4538
74x4543 1 BCD to 7-segment latch/decoder/driver for LCDs 16 CD74HC4543
74x4560 1 4-bit BCD adder 16 MM74HC4560
74x4724 1 8-bit addressable latch 16 SN74HC4724
74x4764 1 programmable dRAM controller (100) 74ABT4764
74x4799 1 Timer for NiCd and NiMH chargers Schmitt trigger open-collector and three-state 16 74LV4799
74x4851 1 8-channel analog multiplexer/demultiplexer analog 16 SN74HC4851
74x4852 2 dual 4-channel analog multiplexer/demultiplexer analog 16 SN74HC4852
74x5074 2 dual positive edge-triggered D-type flip-flop (metastable immune) 14 74ABT5074
74x5245 1 octal bidirectional transceiver Schmitt trigger three-state 20 DM74ALS5245
74x5300 1 fiber optic LED driver driver 120 mA 8 74F5300
74x5302 2 dual fiber optic LED / clock driver driver 160 mA 14 74F5302
74x5400 1 11-bit line/memory driver, non-inverting three-state, 25 Ω series resistor 28 SN74ABT5400
74x5401 1 11-bit line/memory driver, inverting three-state, 25 Ω series resistor 28 SN74ABT5401
74x5402 1 12-bit line/memory driver, non-inverting three-state, 25 Ω series resistor 28 SN74ABT5402
74x5403 1 12-bit line/memory driver, inverting three-state, 25 Ω series resistor 28 SN74ABT5403
74x5555 1 programmable delay timer with oscillator 16 74HC5555
74x5620 1 octal bidirectional transceiver Schmitt trigger three-state 20 DM74ALS5620

74x6000 and above

Part number 		Units Description Input Output Pins Datasheet
74x6000 1 logic-to-logic optocoupler, non-inverting 6 74OL6000
74x6001 1 logic-to-logic optocoupler, inverting 6 74OL6001
74x6010 1 logic-to-logic optocoupler, non-inverting open-collector 15 V 6 74OL6010
74x6011 1 logic-to-logic optocoupler, inverting open-collector 15 V 6 74OL6011
74x6300 1 programmable dynamic memory refresh timer 16 SN74ALS6300
74x6301 1 dynamic memory refresh controller, transparent and burst modes, for 16K, 64K, 256K, and 1M dRAM 52 SN74ALS6301
74x6302 1 dynamic memory refresh controller, transparent and burst modes, for 16K, 64K, 256K, and 1M dRAM 52 SN74ALS6302
74x6310 1 static column and page mode access detector for dRAM 20 SN74ALS6310A
74x6311 1 static column and page mode access detector for dRAM 20 SN74ALS6311A
74x6323 1 programmable ripple counter with oscillator three-state (8) 74HC6323A
74x6364 1 64-bit flow-through error detection and correction circuit three-state (207) SN74AS6364
74x6800 1 10-bit FET bus switch with precharge 24 IDT74FST6800
74x6845 1 8-bit FET bus switch with precharge and extended voltage range (20) SN74CBT6845C
74x7001 4 quad 2-input AND gate Schmitt trigger 14 SN74HC7001
74x7002 4 quad 2-input NOR gate Schmitt trigger 14 SN74HC7002
74x7003 4 quad 2-input NAND gate Schmitt trigger open-collector 14 SN74HC7003
74x7006 6 two inverters, one 3-input NAND, one 4-input NAND, one 3-input NOR, one 4-input NOR 24 SN74HC7006
74x7007 6 hex buffer gate 14 TC74HCT7007AP
74x7008 6 two inverters, three 2-input NAND, three 2-input NOR 24 SN74HC7008
74x7014 6 hex buffer gate Schmitt trigger 14 74HC7014
74x7022 1 4-stage ÷8 Johnson counter with power-up clear 14 SN74HC7022
74x7030 1 576-bit FIFO memory (64x9) three-state 28 74HC7030
74x7032 4 quad 2-input OR gates Schmitt trigger 14 SN74HC7032
74x7038 1 9-bit bus transceiver with latch three-state 24 CD74HC7038
74x7046 1 phase-locked loop with voltage-controlled oscillator and lock detector 16 CD74HC7046A
74x7060 1 14-stage binary counter with oscillator Schmitt trigger 20 CD74AC7060
74x7074 6 two inverters, one 2-input NAND, one 2-input NOR, two D-type flip-flops 24 SN74HC7074
74x7075 6 two inverters, two 2-input NAND, two D-type flip-flops 24 SN74HC7075
74x7076 6 two inverters, two 2-input NOR, two D-type flip-flops 24 SN74HC7076
74x7080 1 16-bit parity generator / checker 20 74HCT7080
74x7132 4 quad adjustable comparator with output latches Schmitt trigger three-state 14 74HCT7132
74x7200 1 2304-bit FIFO memory (256x9) 28 SN74ACT7200L
74x7201 1 4608-bit FIFO memory (512x9) 28 SN74ACT7201LA
74x7202 1 9216-bit FIFO memory (1024x9) 28 SN74ACT7202LA
74x7203 1 18432-bit FIFO memory (2048x9) 28 SN74ACT7203L
74ACT7204 1 36864-bit FIFO memory (4096x9) 28 SN74ACT7204L
74HCU7204 2 dual unbuffered inverters (8) SN74HCU7204
74x7205 1 73728-bit FIFO memory (8192x9) 28 SN74ACT7205L
74x7206 1 147456-bit FIFO memory (16384x9) 28 SN74ACT7206L
74x7240 1 octal bus buffer, inverting Schmitt trigger three-state 20 TC74HC7240AP
74x7241 1 octal bus buffer, non-inverting Schmitt trigger three-state 20 TC74HC7241AP
74x7244 1 octal bus buffer, non-inverting Schmitt trigger three-state 20 TC74HC7244AP
74x7245 1 octal bus transceiver, non-inverting Schmitt trigger three-state 20 M74HC7245
74x7266 4 quad 2-input XNOR gate 14 SN74HC7266
74x7273 8 octal positive edge-triggered D-type flip-flop with reset open-collector 20 74HCT7273
74x7292 1 programmable divider/timer 16 TC74HC7292AP
74x7294 1 programmable divider/timer 16 M74HC7294
74x7340 1 8-bit bus driver with bidirectional registers three-state 24 SN74HC7340
74x7403 1 256-bit FIFO memory (64x4) three-state 16 74HC7403
74x7404 1 320-bit FIFO memory (64x5) three-state 18 74HC7404
74x7540 8 octal buffer/line driver, inverting Schmitt trigger three-state 20 74HC7540
74x7541 8 octal buffer/line driver, non-inverting Schmitt trigger three-state 20 74HC7541
74x7597 1 8-bit shift register with input latches 16 74HC7597
74x7623 1 octal bus transceiver, non-inverting three-state and open-drain 20 CD74AC7623
74x7640 1 octal bus transceiver, inverting Schmitt trigger three-state 20 M74HC7640
74x7643 1 octal bus transceiver, non-inverting/inverting Schmitt trigger three-state 20 M74HC7643
74x7645 1 octal bus transceiver, non-inverting Schmitt trigger three-state 20 M74HC7645
74x7731 4 quad 64-bit static shift register 16 74HC7731
74x7793 1 8-bit noninverting transparent latch with readback three-state 20 MC74HC7793
74x7801 1 18432-bit FIFO memory (1024x18), clocked three-state (68) SN74ACT7801
74x7802 1 18432-bit FIFO memory (1024x18) three-state (68) SN74ACT7802
74x7803 1 9216-bit FIFO memory (512x18), clocked three-state (56) SN74ACT7803
74x7804 1 9216-bit FIFO memory (512x18) three-state (56) SN74ACT7804
74x7805 1 4608-bit FIFO memory (256x18), clocked three-state (56) SN74ACT7805
74x7806 1 4608-bit FIFO memory (256x18) three-state (56) SN74ACT7806
74x7807 1 18432-bit FIFO memory (2048x9), clocked three-state (44) SN74ACT7807
74x7808 1 18432-bit FIFO memory (2048x9) three-state (44) SN74ACT7808
74x7811 1 18432-bit FIFO memory (1024x18), clocked three-state (68) SN74ACT7811
74x7813 1 1152-bit FIFO memory (64x18), clocked three-state (56) SN74ACT7813
74x7814 1 1152-bit FIFO memory (64x18) three-state (56) SN74ACT7814
74x7815 1 4608-bit bidirectional FIFO memory(2x64x36) three-state (120) SN74ABT7815
74x7816 1 4608-bit bidirectional FIFO memory(2x64x36) three-state (120) SN74ABT7816
74x7817 1 2304-bit FIFO memory(64x36) three-state (120) SN74ABT7817
74x7818 1 2304-bit FIFO memory(64x36) three-state (120) SN74ABT7818
74x7819 1 18432-bit bidirectional FIFO memory (2x512x18), clocked three-state (80) SN74ABT7819
74x7820 1 18432-bit bidirectional FIFO memory (2x512x18) three-state (80) SN74ABT7820
74x7821 1 32768-bit bidirectional FIFO memory (2x512x32) three-state (120) SN74ACT7821
74x7822 1 32768-bit bidirectional FIFO memory (2x512x32), clocked three-state (120) SN74ACT7822
74x7823 1 36864-bit FIFO memory (1024x36), clocked three-state (120) SN74ACT7823
74x7881 1 18432-bit FIFO memory (1024x18), clocked three-state (68) SN74ACT7881
74x7882 1 36864-bit FIFO memory (2048x18), clocked three-state (68) SN74ACT7882
74x7884 1 73728-bit FIFO memory (4096x18), clocked three-state (68) SN74ACT7884
74x8003 2 dual 2-input NAND gate 8 SN74ALS8003
74x8151 1 10-bit inverting/non-inverting buffer Schmitt trigger three-state 24 SN74LV8151
74x8153 1 8-bit serial-to-parallel interface three-state or open-collector 20 SN74LV8153
74x8154 2 dual 16-bit counters with output registers three-state 20 SN74LV8154
74x8161 1 8-bit synchronous binary counter 24 SN74ALS8161
74x8240 1 octal inverting buffer with JTAG port three-state 24 SN74BCT8240A
74x8244 1 octal non-inverting buffer with JTAG port three-state 24 SN74BCT8244A
74x8245 1 octal bus transceiver with JTAG port three-state 24 SN74ABT8245
74x8373 1 octal D-type latch with JTAG port three-state 24 SN74BCT8373A
74x8374 1 octal D-type edge-triggered flip-flop with JTAG port three-state 24 SN74BCT8374A
74x8400 1 expandable error checker / corrector three-state 48 SN74ALS8400
74x8541 1 8-bit buffer, selectable inverting/non-inverting Schmitt trigger three-state 20 SN74AHC8541
74x8543 1 octal registered bus transceiver with JTAG port three-state 28 SN74ABT8543
74x8646 1 octal bus transceiver and register with JTAG port three-state 28 SN74ABT8646
74x8652 1 octal bus transceiver and register with JTAG port three-state 28 SN74ABT8652
74x8818 1 16-bit microprogram sequencer, cascadable three-state (84) SN74ACT8818
74x8832 1 32-bit registered ALU three-state (208) SN74ACT8832
74x8834 1 40-bit register file three-state (156) SN74AS8834
74x8835 1 16-bit microprogram sequencer, cascadable three-state (156) SN74AS8835
74x8836 1 32x32-bit multiplier/accumulator three-state (156) SN74ACT8836
74x8837 1 64-bit floating point unit three-state (208) SN74ACT8837
74x8838 1 64-bit barrel shifter three-state (84) SN74AS8838
74x8839 1 32-bit shuffle/exchange network three-state (85) SN74AS8839
74x8840 1 digital crossbar switch three-state (156) SN74AS8840
74x8841 1 digital crossbar switch three-state (156) SN74ACT8841
74x8847 1 64-bit floating point and integer unit three-state (208) SN74ACT8847
74x8867 1 32-bit vector processor unit three-state (208) SN74ACT8867
74x8952 1 octal registered bus transceiver with JTAG port three-state 28 SN74ABT8952
74x8960 1 8-bit bidirectional latched FutureBus transceiver, inverting three-state and open-collector 28 74F8960
74x8961 1 8-bit bidirectional latched FutureBus transceiver, non-inverting three-state and open-collector 28 74F8961
74x8962 1 9-bit bidirectional latched FutureBus transceiver, inverting three-state and open-collector (44) 74F8962
74x8963 1 9-bit bidirectional latched FutureBus transceiver, non-inverting three-state and open-collector (44) 74F8963
74x8965 1 9-bit bidirectional latched FutureBus transceiver, latch select three-state and open-collector (44) 74F8965
74x8966 1 9-bit bidirectional latched FutureBus transceiver, idle arbitration request / output three-state and open-collector (44) 74F8966
74x8980 1 JTAG test access port master with 8-bit host interface three-state 24 SN74LVT8980
74x8986 1 linkable, multidrop-addressable JTAG transceiver three-state (64) SN74LVT8986
74x8990 1 JTAG test access port master with 16-bit host interface three-state (44) SN74ACT8990
74x8994 1 JTAG scan-controlled logic/signature analyzer (28) SN74ACT8994
74x8996 1 multidrop-addressable JTAG transceiver 24 SN74ABT8996
74x8997 1 scan-controlled JTAG concatenator three-state 28 SN74ACT8997
74x8999 1 scan-controlled JTAG multiplexer three-state 28 SN74ACT8999
74x9000 1 programmable timer with oscillator 20 MC74HC9000
74x9014 9 nine-wide buffer/line driver, inverting Schmitt trigger 20 74HC9014
74x9015 9 nine-wide buffer/line driver, non-inverting Schmitt trigger 20 74HC9015
74x9034 9 nine-wide buffer, inverting 20 MC74HC9034
74x9035 9 nine-wide buffer, noninverting 20 MC74HC9035
74x9046 1 PLL with band gap controlled VCO 16 74HCT9046
74x9114 9 nine-wide inverter Schmitt trigger open-collector 20 74HC9114
74x9115 9 nine-wide buffer Schmitt trigger open-collector 20 74HC9115
74x9134 9 nine-wide buffer, inverting open-collector 20 MC74HC9134
74x9135 9 nine-wide buffer, noninverting open-collector 20 MC74HC9135
74x9164 1 8-bit shift register (serial in/out, parallel in/out) Schmitt trigger three-state (16) TC74VHC9164
74x9240 1 9-bit buffer / line driver, inverting three-state 24 74FR9240
74x9244 1 9-bit buffer / line driver, non-inverting three-state 24 74FR9244
74x9245 1 9-bit bidirectional transceiver, non-inverting three-state 24 74FR9245
74x9323 1 programmable ripple counter with oscillator three-state (8) 74HC9323A
74x9510 1 16×16-bit multiplier/accumulator (compatible to Am29510 and TDC1010) three-state (68) 74HC9510[9]: 534 
74x9541 1 8-bit buffer / line driver, inverting / non-inverting Schmitt trigger three-state (20) 74AHC9541A
74x9595 1 8-bit shift register with latch (serial in, parallel out) Schmitt trigger (16) TC74VHC9595
74x40102 1 presettable synchronous 2-decade BCD down counter 16 CD74HC40102
74x40103 1 presettable 8-bit synchronous down counter 16 CD74HC40103
74x40104 4 4-bit bidirectional universal shift register three-state 16 CD74HC40104
74x40105 1 64-bit FIFO memory (16x4) three-state 16 CD74HC40105
Part number Units Description Input Output Pins Datasheet

4000 Series Logic Chips

Overview of 4000 Series Logic Chips

The 4000 series is a family of CMOS (Complementary Metal-Oxide-Semiconductor) logic ICs that are designed for low power consumption. The 4000 series is often used for higher voltage applications, and these chips provide many of the same logic functions as the 74 series, but with a lower power requirement.

The 4000 series ICs can operate at a wide range of supply voltages, from 3V to 15V, and are commonly used in battery-powered devices, low-power electronics, and other applications where power efficiency is important.

Table: 4000 Series Logic Families and Key Features

Logic Family Technology Operating Voltage Speed Power Consumption
4000 (Standard CMOS) CMOS 3V - 15V Low Very Low
4020 (Binary Counter) CMOS 3V - 15V Medium Low
4060 (Oscillator & Counter) CMOS 3V - 15V Medium Low
4011 (Quad 2-input NAND Gate) CMOS 3V - 15V Medium Low
4050 (Hex Buffer) CMOS 3V - 15V Low Very Low

Table: Logic Functions by Part Number (4000 Series)

Part number Category Units Description of 4000 to 4099 Pins Datasheet
4000 Logic Gates 2 Dual 3-input NOR gate + One inverter gate 14 RCA
4001 Logic Gates 4 Quad 2-input NOR gate 14 RCA, TI
4002 Logic Gates 2 Dual 4-input NOR gate 14 RCA, TI
4006 Shift Registers 1 18-stage shift register (four independent with common clock: two 4-stage, two 5-stage with Q4 tap) 14 RCA
4007 Analog/Digital 2 Dual complementary enhanced-MOS transistor pair + 1 inverter gate 14 RCA, TI
4008 Math 1 4-bit binary full adder 16 RCA
4009 Logic Gates 6 Hex inverter gate, dual power supply, can drive 1 TTL/DTL load (replaced by 4049) 16 RCA, TI
4010 Logic Gates 6 Hex buffer gate, dual power supply, can drive 1 TTL/DTL load (replaced by 4050) 16 RCA, TI
4011 Logic Gates 4 Quad 2-input NAND gate 14 RCA, TI
4012 Logic Gates 2 Dual 4-input NAND gate 14 RCA, TI
4013 Flip-Flops 2 Dual D-type flip-flop, Q & Q outputs, positive-edge trigger, asynchronous set and reset 14 RCA, TI
4014 Shift Registers 1 8-stage parallel in shift register (synchronous parallel load, serial in, Q6/Q7/Q8 out) (see 4021 for asynchronous) 16 RCA, TI
4015 Shift Registers 2 Dual 4-stage shift register (two independent: serial in, Q1/Q2/Q3/Q4 out, reset, clock) 16 RCA, TI
4016 Analog Switches 4 Quad bilateral switch 14 RCA, TI
4017 Counters 1 Decade counter (5-stage Johnson counter) with 10-output decoder, active HIGH output (see 4022 for octal) 16 RCA, TI
4018 Counters 1 Presettable divide-by-N counter 16 RCA, TI
4019 Logic Gates 4 Quad AND-OR select gate 16 RCA, TI
4020 Counters 1 14-stage binary ripple counter 16 RCA, TI
4021 Shift Registers 1 8-stage parallel in shift register (asynchronous parallel load, serial in, Q6/Q7/Q8 out) (see 4014 for synchronous) 16 RCA, TI
4022 Counters 1 Octal counter (4-stage Johnson counter) with 8-output decoder, active HIGH output (see 4017 for decade) 16 RCA, TI
4023 Logic Gates 3 Triple 3-input NAND gate 14 RCA, TI
4024 Counters 1 7-stage binary ripple counter 14 RCA, TI
4025 Logic Gates 3 Triple 3-input NOR gate 14 RCA, TI
4026 7-Segment Decoders 1 Decade counter with decoded 7-segment display outputs and display enable 16 RCA, TI
4027 Flip-Flops 2 Dual J-K master-slave flip-flop, Q & Q outputs, positive-edge trigger, asynchronous set and reset 16 RCA, TI
4028 Multiplexers 1 4-bit BCD to 10-output decoder (can be used as 3-bit binary to 8-output decoder), active HIGH output 16 RCA, TI
4029 Counters 1 Presettable up/down counter, binary or BCD-decade 16 RCA, TI
4030 Logic Gates 4 Quad XOR gate (replaced by 4070) 14 RCA, TI
4031 Shift Registers 1 64-stage shift register 16 RCA, TI
4032 Math 3 Triple serial adder 16 RCA
4033 7-Segment Decoders 1 Decade counter with decoded 7-segment display outputs and ripple blanking 16 RCA, TI
4034 Registers 1 8-stage bidirectional parallel/serial input/output register 24 RCA, TI
4035 Shift Registers 1 4-stage parallel-in/parallel-out shift register 16 RCA, TI
4037 3 Triple AND-OR bi-phase pairs 14 RCA
4038 Math 3 Triple serial adder 16 RCA
4040 Counters 1 12-stage binary ripple counter 16 RCA, TI
4041 Logic Gates 4 Quad buffer/inverter (2 outputs per gate) (4 times standard "B" drive) 14 RCA, TI
4042 Latches 4 Quad D-type latch, Q & Q outputs, positive or negative edge trigger depending on polarity pin, shared clock 16 RCA, TI
4043 Latches 4 Quad NOR R-S latch, Q outputs, three-state outputs 16 RCA, TI
4044 Latches 4 Quad NAND R-S latch, Q outputs, three-state outputs 16 RCA, TI
4045 Counters 1 21-stage counter 16 RCA, TI
4046 PLL 1 Phase-locked loop with VCO 16 RCA, TI
4047 Timers 1 Monostable/astable multivibrator, external RC oscillator 14 RCA, TI
4048 Logic Gates 1 Single expandable 8-input 8-function gate, three-state output,
choice of: NOR, OR, NAND, AND, AND-NOR (AOI), AND-OR, OR-NAND (OAI), OR-AND 		16 RCA, TI
4049 Logic Gates 6 Hex inverter gate, can drive two TTL/RTL loads or four 74LS loads 16 RCA, TI
4050 Logic Gates 6 Hex buffer gate, can drive two TTL/RTL loads or four 74LS loads 16 RCA, TI
4051 Analog Switches 1 Single 8-channel analog multiplexer/demultiplexer 16 RCA, TI
4052 Analog Switches 2 Dual 4-channel analog multiplexer/demultiplexer 16 RCA, TI
4053 Analog Switches 3 Triple 2-channel analog multiplexer/demultiplexer 16 RCA, TI
4054 LCD Drivers 1 4-segment LCD driver with latch 16 RCA, TI
4055 LCD Drivers 1 BCD to 7-segment decoder/LCD driver with "display-frequency" output 16 RCA, TI
4056 LCD Drivers 1 BCD to 7-segment decoder/LCD driver with strobed-latch function 16 RCA, TI
4057 Math 1 4-bit arithmetic logic unit (ALU) 28 RCA
4059 Counters 1 Programmable divide-by-N counter 24 RCA, TI
4060 Counters 1 14-stage binary ripple counter, external RC or crystal oscillator (32.768 kHz compatible), schmitt trigger inputs 16 RCA, TI
4061 Memory 1 256x1 bit static RAM 16 RCA
4062 Shift Registers 1 200-stage dynamic shift register 16 RCA
4063 Math 1 4-bit magnitude comparator 16 RCA, TI
4066 Analog Switches 4 Quad analog switch (low "ON" resistance) 14 RCA, TI
4067 Analog Switches 1 Single 16-channel analog multiplexer/demultiplexer (1-of-16 switch) 24 RCA, TI
4068 Logic Gates 1 Single 8-input NAND/AND gate (2 outputs per gate) 14 RCA, TI
4069 Logic Gates 6 Hex inverter 14 RCA, TI
4070 Logic Gates 4 Quad 2-input XOR gate 14 RCA, TI
4071 Logic Gates 4 Quad 2-input OR gate 14 RCA, TI
4072 Logic Gates 2 Dual 4-input OR gate 14 RCA, TI
4073 Logic Gates 3 Triple 3-input AND gate 14 RCA, TI
4075 Logic Gates 3 Triple 3-input OR gate 14 RCA, TI
4076 Registers 4 Quad D-type register, three-state outputs 16 RCA, TI
4077 Logic Gates 4 Quad 2-input XNOR gate 14 RCA, TI
4078 Logic Gates 1 Single 8-input NOR/OR gate (2 outputs per gate) 14 RCA, TI
4081 Logic Gates 4 Quad 2-input AND gate 14 RCA, TI
4082 Logic Gates 2 Dual 4-input AND gate 14 RCA, TI
4085 Logic Gates 2 Dual 2-wide, 2-input AND-OR-Invert (AOI) 14 RCA, TI
4086 Logic Gates 1 Single expandable 4-wide, 2-input AND-OR-Invert (AOI) 14 RCA, TI
4089 Rate Multipliers 1 Binary rate multiplier 16 RCA, TI
4093 Logic Gates 4 Quad 2-input NAND gate, schmitt trigger inputs 14 RCA, TI
4094 Shift Registers 1 8-stage shift-and-store bus 16 RCA, TI
4095 Flip-Flops 1 Gated J-K flip-flop, Q & Q outputs, positive-edge trigger, asynchronous set and reset, non-inverting inputs 14 RCA, TI
4096 Flip-Flops 1 Gated J-K flip-flop, Q & Q outputs, positive-edge trigger, asynchronous set and reset, inverting and non-inverting inputs 14 RCA, TI
4097 Analog Switches 1 Single differential 8-channel analog multiplexer/demultiplexer 24 RCA, TI
4098 Timers 2 Dual one-shot monostable 16 RCA, TI
4099 Latches 1 8-bit addressable latch 16 RCA, TI
Part number Category Units Description of 40100 to 40199 Pins Datasheet
40100 Shift Registers 1 32-stage left/right shift register 16 RCA
40101 Logic Gates 1 9-bit parity generator 14 RCA
40102 Counters 1 Presettable 2-decade BCD down counter 16 RCA, TI
40103 Counters 1 Presettable 8-bit binary down counter 16 RCA, TI
40104 Shift Registers 1 4-bit bidirectional parallel-in/parallel-out shift register, three-state outputs 16 RCA
40105 Memory 1 4-bit x 16 word FIFO register 16 RCA, TI
40106 Logic Gates 6 Hex inverter gate, schmitt trigger inputs 14 RCA, TI
40107 Logic Gates/Driver 2 Dual 2-input NAND gate, 136 mA open drain output driver (32 times standard "B" sink) 8 RCA, TI
40108 Memory 1 4x4-bit synchronous triple-port register file, three-state outputs 24 RCA
40109 Voltage Translator 4 Quad voltage level translator, three-state outputs, dual power rails 16 RCA, TI
40110 7-Segment Decoders 1 Up/down decade counter, latch, 7-segment decoder, LED driver 16 RCA, TI
40117 2 Dual programmable 4-bit terminator 14 RCA, TI
40147 1 10-line to 4-line (BCD) priority encoder 16 RCA, TI
40160 Counters 1 4-bit synchronous decade counter, asynchronous clear, load, ripple carry output 16 RCA, TI
40161 Counters 1 4-bit synchronous binary counter, asynchronous clear, load, ripple carry output 16 RCA, TI
40162 Counters 1 4-bit synchronous decade counter, synchronous clear, load, ripple carry output 16 RCA, TI
40163 Counters 1 4-bit synchronous binary counter, synchronous clear, load, ripple carry output 16 RCA, TI
40174 Flip-Flops 6 Hex D-type flip-flop, Q outputs, positive-edge trigger, shared clock and clear 16 RCA, TI
40175 Flip-Flops 4 Quad D-type flip-flop, Q & Q outputs, positive-edge trigger, shared clock and clear 16 RCA, TI
40181 Math 1 4-bit 16-function arithmetic logic unit (ALU) 24 RCA
40182 Math 1 Look-ahead carry generator for four adders 16 RCA
40192 Counters 1 Presettable 4-bit up/down BCD counter 16 RCA, TI
40193 Counters 1 Presettable 4-bit up/down binary counter 16 RCA, TI
40194 Shift Registers 1 4-bit bidirectional parallel-in/parallel-out shift register 16 RCA, TI
Part number Category Units Description of 40200 to 40299 Pins Datasheet
40208 Memory 1 4 x 4-bit synchronous triple-port register file, three-state outputs 24 RCA
40257 Multiplexers 4 Quad 2-line to 1-line data selector/multiplexer, three-state outputs 16 RCA, TI
Part number Category Units Description of 4500 to 4599 Pins Datasheet
4500 1 Industrial control unit (ICU), 1-bit microprocessor 16 Motorola
4502 Logic Gates 6 Hex strobed inverter, three-state outputs 16 RCA, TI
4503 Logic Gates 6 Hex buffer, three-state outputs 16 RCA, TI
4504 Voltage Translator 6 Hex voltage translator, TTL-to-CMOS or CMOS-to-CMOS, dual power rails 16 TI
4508 Latches 2 Dual 4-bit latch, Q outputs, three-state outputs 24 RCA, TI
4510 Counters 1 Presettable 4-bit BCD up/down counter 16 RCA, TI
4511 7-Segment Decoders 1 BCD to 7-segment latch/decoder/LED driver 16 RCA, TI
4512 Multiplexers 1 8-input multiplexer (data selector), three-state output 16 RCA, TI
4514 Multiplexers 1 1-of-16 decoder/demultiplexer, active HIGH output 24 RCA, TI
4515 Multiplexers 1 1-of-16 decoder/demultiplexer, active LOW output 24 RCA, TI
4516 Counters 1 Presettable 4-bit binary up/down counter 16 RCA, TI
4517 Shift Registers 2 Dual 64-stage shift register 16 RCA, TI
4518 Counters 2 Dual BCD up counter 16 RCA, TI
4520 Counters 2 Dual 4-bit binary up counter 16 RCA, TI
4521 Timers/Divider 1 24-stage frequency divider, choice of external / RC / crystal oscillator, 18 thru 24 stage outputs 16 TI
4522 Counters 1 Programmable BCD divide-by-N counter 16 TI
4527 1 BCD rate multiplier 16 RCA, TI
4531 Logic Gates 1 13-input parity checker/generator 16 Philips
4532 Multiplexers 1 8-bit priority encoder, 3-bit output 16 RCA, TI
4536 Timers 1 Programmable timer, external clock or RC oscillator, choice of divider from 1 to 24 stages 16 RCA, TI
4538 Timers 2 Dual retriggerable precision monostable multivibrator, Q & Q outputs 16 RCA, TI
4541 Timers 1 Programmable timer, external clock or RC oscillator, choice of divider of 8 / 10 / 13 / 16 stages 14 RCA, TI
4543 LCD Drivers 1 BCD to 7-segment latch/decoder/LCD driver, phase input 16 RCA, TI
4555 Multiplexers 2 Dual 1-of-4 decoder/demultiplexer, active HIGH output 16 RCA, TI
4556 Multiplexers 2 Dual 1-of-4 decoder/demultiplexer, active LOW output 16 RCA, TI
4572 Logic Gates 6 Hex gates: quad inverter gate, single 2-input NAND gate, single 2-input NOR gate 16 TI
4580 Memory 1 4 x 4-bit synchronous triple-port register file, three-state outputs 24 Motorola
4584 Logic Gates 6 Hex inverter gate, schmitt trigger inputs 14 Onsemi
4585 Math 1 4-bit digital comparator 16 RCA, TI
Part number Category Units Description of 4700 to 4799 Pins Datasheet
4724 1 8-bit addressable latch 16 RCA, TI

Charlieplexing

Charlieplexing is a technique to control a large number of LEDs using a small number of I/O pins on a microcontroller. It takes advantage of the fact that microcontroller pins can be in three states: HIGH, LOW, and High-Z (input mode).

The key idea is to connect LEDs between every unique pair of microcontroller pins, with each LED oriented in the opposite direction of its twin on the same pair. By dynamically switching the pin states, each LED can be individually turned on without interference.

The number of controllable LEDs with N pins is given by:

For example, using 3 I/O pins, you can control up to 6 LEDs.

Charlieplexing 6 LEDs with 3 Pins (Arduino UNO)

Wiring: Connect 6 LEDs between each pair of D2, D3, D4 in both directions. Use current-limiting resistors (220Ω–470Ω) per LED.


const int pins[] = {2, 3, 4}; // Three I/O pins

// LED mapping: [source pin, sink pin]
const byte ledMap[6][2] = {
  {2, 3}, // LED 0
  {3, 2}, // LED 1
  {2, 4}, // LED 2
  {4, 2}, // LED 3
  {3, 4}, // LED 4
  {4, 3}  // LED 5
};

void setup() {
  // No need to set pinMode in setup — it's done in loop dynamically
}

void loop() {
  for (int i = 0; i < 6; i++) {
    lightLED(i);
    delay(200); // Cycle through LEDs
  }
}

void lightLED(int led) {
  int hi = ledMap[led][0];
  int lo = ledMap[led][1];

  // Set all pins to input (high impedance)
  for (int i = 0; i < 3; i++) {
    pinMode(pins[i], INPUT);
  }

  // Drive the selected LED
  pinMode(hi, OUTPUT);
  pinMode(lo, OUTPUT);
  digitalWrite(hi, HIGH);
  digitalWrite(lo, LOW);
}

Charlieplexing SVG Diagram (3 Pins → 6 LEDs)

D2 D3 D4 D2→D3 D3→D2 D2→D4 D4→D2 D3→D4 D4→D3

RAM – Random Access Memory

RAM stores data that can be read and written quickly, typically used for CPU working storage, buffering, and video display refresh.

1️⃣ Static RAM (SRAM)

Definition: Uses flip-flop latches (6-transistor cells). No refresh required. Fast but lower density and more expensive than DRAM.

Example Chip: CY7C199-35PC

2️⃣ Dual-Port SRAM

Definition: Two independent address/data ports can access memory simultaneously.

Example Chip: IDT7132SA55J

3️⃣ Video RAM (VRAM)

Definition: Specialized RAM with a dual-ported interface for display refresh. One port for CPU writes, one serial port for pixel output.

Example Chip: MB81461-10

4️⃣ Dynamic RAM (DRAM)

Definition: Stores data as charge on capacitors → must be refreshed periodically. High density, cheap, but slower.

Example Chip: HM514260

5️⃣ DRAM with Embedded Refresh (Self-Refresh DRAM)

Definition: Includes internal refresh controller — often used in low-power and battery-backed systems.

Example Chip: IS42S16400J (SDRAM)

Programmable & Non-Volatile Memory

Programmable read-only memories (PROM, EPROM, EEPROM, and Flash) provide data retention without power. They evolved from one-time fusible devices into reprogrammable and high-endurance storage used in microcontrollers, firmware, USB drives, and SSDs.

1️⃣ PROM – Programmable Read-Only Memory

Definition: PROMs are programmed once by blowing internal fuses or antifuses, permanently storing data. They were used for fixed microcode, lookup tables, and early firmware storage before EPROMs became common.

Example Chip: MB7052 (Fujitsu)

2️⃣ EPROM – Erasable Programmable Read-Only Memory

Definition: EPROMs store data as charge on floating-gate MOS transistors. They can be erased by exposure to UV light through a quartz window and reprogrammed electrically.

Example Chip: 27C256

OTP (One-Time Programmable EPROM)

OTP EPROMs are identical to standard EPROMs but supplied in opaque plastic packages without the quartz window, making erasure impossible. They provided cheaper permanent storage for production runs after firmware finalization.

Example Chip: 27C512 OTP

3️⃣ EEPROM – Electrically Erasable Programmable Read-Only Memory

Definition: EEPROM allows both electrical erasure and reprogramming of individual bytes or small blocks, without removing the chip from circuit. It replaced EPROMs in many embedded systems, enabling runtime configuration storage.

Example Chip: AT28C64B

4️⃣ Flash Memory

Definition: Flash memory is a derivative of EEPROM that erases and writes data in larger blocks. It offers higher density and lower cost, forming the basis of modern storage systems.

4.1 Early NOR Flash

Overview: Developed in the 1980s, NOR flash provided random read access like a ROM. It was commonly used for firmware storage in embedded systems and PCs.

Example Chip: Am29F040B (AMD)

4.2 NAND Flash

Overview: Introduced in 1987 by Toshiba, NAND flash arranges cells serially, providing far greater density and lower cost per bit. NAND flash became the foundation for removable and solid-state storage.

Example Chip: TC58NVG0S3E (Toshiba)

4.3 Modern Flash (USB & SSD)

Overview: Modern flash memories, used in USB drives and SSDs, employ Multi-Level Cell (MLC), Triple-Level Cell (TLC), and 3D NAND technologies to store multiple bits per cell and stack memory layers vertically for capacity scaling.

Example Chip: Samsung K9G8G08U0M (3D TLC NAND)

Comparison Summary

Type Erase Method Reprogrammable Typical Use Example Device
PROM One-time fuse blow No Fixed firmware, lookup tables MB7052
EPROM UV light erase Yes (limited) Firmware, BIOS 27C256
EEPROM Electrical, byte-level Yes Configuration, small data AT28C64B
Flash Electrical, block-level Yes Storage (USB, SSD) Am29F040B / K9G8G08U0M

Programmable Logic Devices (PLD, CPLD, FPGA)

Programmable Logic Devices are the foundation of modern digital design flexibility, allowing designers to define custom logic without fixed-function ICs. They evolved from simple fuse-programmed gates into complex, high-speed programmable systems capable of replacing entire logic boards.

1️⃣ SPLD – Simple Programmable Logic Device

Definition: The SPLD (Simple PLD) family includes PAL (Programmable Array Logic) and GAL (Generic Array Logic) devices. They consist of programmable AND-OR arrays that implement combinational and limited sequential logic.

Example Device: GAL16V8 (Lattice Semiconductor)

Use Case: Replace multiple small-scale logic ICs (e.g., 74LS00, 74LS138) with one programmable part.

2️⃣ CPLD – Complex Programmable Logic Device

Definition: CPLDs are built from multiple SPLD-like function blocks interconnected through a programmable switch matrix. They offer higher logic density and predictable timing, ideal for control and interfacing applications.

I/O Cell Architecture:

CPLD I/O cells are versatile and robust, designed to interact directly with system buses or external logic. Each I/O cell can include:

Clock inputs are routed through dedicated global or regional clock networks to ensure low-skew distribution. This makes CPLDs well-suited for synchronous designs, timing control, and deterministic interface logic.

Internal Routing: A central switch matrix connects logic blocks and I/O cells, enabling any signal to be routed almost anywhere with predictable timing. Design tools compile HDL or schematic input into optimized sum-of-products equations that map directly onto macrocells and interconnect resources.

Example Device: XC9572 (Xilinx)

3️⃣ Field Programmable Gate Arrays (FPGAs)

Field Programmable Gate Arrays (FPGAs) are the most versatile form of digital logic integration available to engineers. They allow hardware to be reconfigured after manufacture, implementing custom digital circuits without fabricating a new chip. Modern FPGAs can implement entire systems — processors, memory controllers, DSP pipelines, and high-speed interfaces — all in reprogrammable logic.

1. Origins and Evolution

The first commercial FPGA was introduced by Xilinx in 1985 (the XC2064). It offered a modest 64 configurable logic blocks (CLBs) with programmable interconnects — revolutionary for replacing dozens of SSI/MSI logic ICs (such as 74LS00 series). Since then, FPGA density and speed have increased dramatically, following a Moore-like curve. Modern devices from AMD/Xilinx, Intel (Altera), Lattice, and Microchip contain millions of logic elements, hardened DSP and memory blocks, and even ARM or RISC-V processor cores.

2. Core Architecture

At the heart of an FPGA lies an array of Configurable Logic Blocks (CLBs) or Logic Elements (LEs). Each block contains:

These elements form the “logic fabric” and can emulate any digital circuit given sufficient resources.

3. Interconnect and Routing

The defining power of an FPGA lies in its programmable interconnect — a grid of metal tracks and switch matrices connecting every logic cell, I/O, and embedded block. The routing system includes:

The routing resources are configured by static RAM bits or antifuse links, depending on the FPGA family, defining how signals propagate through the chip.

4. I/O Cell Architecture

Every FPGA pin connects through an I/O Block (IOB) that provides configurable electrical and timing characteristics. The IOB can typically be programmed for:

This flexibility allows FPGAs to directly interface with TTL, CMOS, LVDS, and high-speed serial standards without external glue logic.

5. Embedded Resources

Modern FPGAs integrate specialized hardware to handle functions that would be inefficient in general logic:

6. Configuration Technologies

FPGAs are volatile or non-volatile depending on the storage of configuration data:

7. Design Flow and Mapping

FPGA development follows a well-defined flow:

  1. Hardware Description – The designer writes HDL (VHDL, Verilog, or SystemVerilog) describing the desired logic behavior.
  2. Synthesis – The HDL is compiled into a netlist of logic gates and flip-flops.
  3. Place and Route – The netlist is mapped to physical CLBs, routing tracks, and I/O pins, optimizing timing and resource usage.
  4. Bitstream Generation – Configuration data is compiled into a binary file to program the FPGA.
  5. Hardware Verification – Using simulation, timing analysis, and in-circuit debugging (via JTAG, ChipScope, or SignalTap).

8. FPGA vs ASIC vs CPLD

While ASICs provide ultimate performance and power efficiency, they require expensive fabrication. FPGAs strike a balance by offering reconfigurability and rapid iteration at lower non-recurring cost. Compared to CPLDs, FPGAs are larger, faster, and more flexible — suited for entire subsystems, not just glue logic or address decoding.

9. Modern Use Cases

10. Representative Devices

VendorExample DeviceLogic CellsFeatures
XilinxArtix-7 XC7A100T101,440BRAM, DSP slices, mixed-mode clocking, high-speed I/O
Intel (Altera)Cyclone V110,000Embedded ARM cores, variable-precision DSP blocks
LatticeiCE40UP5K5,280Ultra-low power, on-chip flash, open-source toolchain
MicrochipSmartFusion2150k LEsFlash configuration, secure instant-on, embedded Cortex-M3

Summary

FPGAs represent the convergence of flexibility and hardware performance. From their origins replacing TTL glue logic, they now enable reconfigurable computing and hardware acceleration across nearly every industry. The combination of reprogrammable logic, high-speed I/O, and embedded processors makes the FPGA one of the most powerful tools available to the modern electronic designer.