A personal repository of random information in compensation for a fatigued biological computer
74AHCT replace HCT? better pricing..
http://www.cybermike.net/reference/74series.html
TTL 74xx Family Functions
No | Description | No | Description |
00 | Quad 2-Input NAND Gate | 01 | Quad 2-Input NAND Gate (OC) |
02 | Quad 2-Input Positive NOR Gate | 03 | Quad 2-Input Positive NAND Gate |
04 | Hex Inverter | 05 | Hex Inverter (OC) |
06 | Hex Inverter Buffer/Driver (OC) | 07 | 30V,40mA Hex Buffer Driver (OC) |
08 | Quad 2-Input AND Gate | 09 | Quad 2-Input Positive AND Gate (OC) |
10 | Triple 3-Input Positive NAND Gate | 11 | Triple 3-Input Positive AND Gate |
14 | Hex Inverting Schmitt Trigger | 16 | Hex Inverter Buffer/Driver (OC) |
17 | 15V,40mA Hex Buffer Driver (OC) | 20 | Dual 4-Input Positive NAND Gate |
21 | Dual 4-Input Positive AND Gate | 25 | Dual 4-Input Positive NOR Gate |
26 | Quad 2-Input NAND Gate (OC) | 27 | Triple 3-Input NOR Gate |
28 | Quad 2-Input NOR Buffer | 30 | 8-Input Positive NAND Gate |
31 | Delay Element | 32 | Quad 2-Input Positive OR Gate |
33 | Quad 2-Input NOR Buffer (OC) | 37 | Quad 2-Input Positive NAND Buffer |
38 | Quad 2-Input NAND Buffer (OC) | 42 | BCD To Decimal Decoder (1-of-10) |
45 | BCD To Decimal Decoder/Driver (OC) | 46 | BCD To 7 Segment Decoder/Driver (30V) |
47 | BCD To 7 Segment Decoder/Driver (15V) | 48 | BCD To 7 Segment Decoder/Driver |
57 | Dual 2 Wide 2-Input AND-OR Invert Gate | 58 | Dual AND-OR Gate |
73 | Dual JK Flip-Flop with Reset; Negative-Edge Trigger | 74 | Dual D-Type Flip-Flop with Set and Reset; Positive-Edge Trigger |
75 | Quad Bistable Transparent Latch | 76 | Dual JK Master Slave Flip-Flop |
77 | 4-Bit Bistable Latch | 83 | 4-Bit Binary Full Adder |
85 | 4-Bit Magnitude Comparator | 86 | Quad 2-Input EXCLUSIVE-OR Gate |
90 | Decade Counter | 93 | 4-Bit Binary Ripple Counter |
97 | 6-Bit Asynchronous Binary Rate Multiplier | 107 | Dual JK Flip-Flop with Reset; Negative-Edge Trigger |
109 | Dual JK Flip-Flop with Set and Reset; Positive-Edge Trigger | 112 | Dual JK Flip-Flop with Set and Reset; Negative-Edge Trigger |
121 | One Short Multivibrator | 122 | Retriggerable Monostable Multivibrator |
123 | Dual Retriggerable Monostable Multivibrator with Reset | 124 | Dual Voltage Controlled Oscillator |
125 | Quad Buffer/Line Driver (3-State) | 126 | Quad Buffer/Line Driver (3-State) |
128 | Quad 2-Input NOR Line Driver | 132 | Quad 2-Input NAND Schmitt Trigger |
133 | 13-Input NAND Gate | 136 | Quad Exclusive OR Gate (OC) |
137 | 3-to-8 Line Decoder/Demultiplexer with Address Latches; Inv | 138 | 3-to-8 Line Decoder/Demultiplexer; Inverting 238 is Non Inverting |
139 | Dual 2-to-4 Line Decoder/Demultiplexer | 140 | Dual 4-Input NAND Line Driver |
145 | BCD To Decimal Decoder/Driver (OC) | 147 | 10-to-4 Line Priority Encoder |
148 | 8-to-3 Priority Encoder | 150 | 16-Input Multiplexer |
151 | 8-Input Multiplexer | 153 | Dual 4-Input Multiplexer |
154 | 4-to-16 Line Decoder/Demultiplexer Inverting |
155 | Dual 2-to-4 Demultiplexer |
156 | Dual 2-to-4 Demultiplexer (OC) | 157 | Quad 2-Input Multiplexer |
158 | Quad 2-Input Multiplexer; Inverting | 159 | 4-to-16 Line Decoder |
160 | Presettable Synchronous BCD Decade Counter; Reset | 161 | Presettable Synchronous 4-Bit Binary Counter; Reset |
163 | Presettable Synchronous 4-Bit Binary Counter; Reset | 164 | 8-Bit Serial-In/Parallel-Out Shift Register |
165 | 8-Bit Parallel-In/Serial-Out Shift Register | 166 | 8-Bit Parallel-In/Serial-Out Shift Register |
169 | Synchronous 4-Bit Binary Up/Down Counter | 173 | Quad D-Type Flip-Flop; Positive-Edge Trigger (3-State) |
174 | Hex D-Type Flip-Flop with Reset; Positive-Edge Trigger | 175 | Quad D-Type Flip-Flop with Reset; Positive-Edge Trigger |
189 | 64-Bit Bipolar Scratch Pad Memory | 190 | Synchronous Decade Up/Down Counter |
191 | Presettable Synchronous 4-Bit Binary Up/Down Counter | 193 | Presettable Synchronous 4-Bit Binary Up/Down Counter |
194 | 4-Bit Bidirectional Universal Shift Register | 195 | 4-Bit Parallel Access Shift Register |
221 | Dual Non-Retriggerable Monostable Multivibrator with Reset | 237 | 3-to-8 Line Decoder/Demultiplexer with Address Latches |
238 | 3-to-8 Line Decoder/Demultiplexer NonInverting 138 is Inverting | 240 | Octal Buffer/Line Driver; Inverting (3-State) |
241 | Octal Buffer/Line Driver (3-State) | 243 | Quad Bus Transceiver (3-State) |
244 | Octal Buffer/Line Driver (3-State) | 245 | Octal Bus Transceiver (3-State) |
251 | 8-Input Multiplexer (3-State) | 253 | Dual 4-Input Multiplexer (3-State) |
257 | Quad 2-Input Multiplexer (3-State) | 258 | Quad 2-Input Multiplexer; Inverting (3-State) |
259 | 8-Bit Addressable Latch | 260 | Dual 5-Bit Input NOR Gate |
269 | 8-Bit Up/Down Counter | 273 | Octal D-Type Flip-Flop with Reset; Positive-Edge Trigger |
279 | Quad R-S Latch | 280 | 9-Bit Odd/Even Parity Generator/Checker |
283 | 4-Bit Binary Full Adder with Fast Carry | 294 | 16-Bit Programmable Frequency Divider |
297 | Digital Phase Locked Loop | 299 | 8-Bit Universal Shift Register (3-State) |
321 | Crystal Oscillator | 365 | Hex Buffer/Line Driver (3-State) |
366 | Hex Buffer/Line Driver; Inverting (3-State) | 367 | Hex Buffer/Line Driver (3-State) |
368 | Hex Buffer/Line Driver; Inverting (3-State) | 373 | Octal D-Type Transparent Latch (3-State) |
374 | Octal D-Type Flip-Flop; Positive Edge-Trigger (3-State) | 375 | Quad Latch |
377 | Octal D-Type Flip-Flop with Data Enable; Positive-Edge Trigger | 378 | Hex D-Type Flip-Flop with Enable |
390 | Dual Decade Ripple Counter | 393 | Dual 4-Bit Binary Ripple Counter |
399 | Quad 2-Input Multiplexer | 423 | Dual Retriggerable Monostable Multivibrator with Reset |
465 | Octal Buffer Tri-State Output | 521 | Octal Comparator |
534 | Octal D-Type Flip-Flop; Positive Edge-Trigger; Inverting (3-State) | 540 | Octal Buffer/Line Driver; Inverting (3-State) |
541 | Octal Buffer/Line Driver (3-State) | 543 | Octal Registered Transceiver |
563 | Octal D-Type Transparent Latch; Inverting (3-State) | 564 | Octal D-Type Flip-Flop; Positive-Edge Trigger; Inverting (3-State) |
569 | Synchronous Didirectional Binary Counter | 573 | Octal D-Type Transparent Latch (3-State) |
574 | Octal D-Type Flip-Flop; Positive Edge-Trigger (3-State) | 579 | 8-Bit Up/Down Counter |
580 | Inverting Octal D-Type Latch | 589 | 8-Bit Shift Register with Input Latch |
592 | 8-Bit Binary Counter with Input Register | 593 | 8-Bit Binary Counter O/P Register TS I/O |
594 | 8-Bit Shift Register with Output Register | 595 | 8-Bit Ser-In/Ser Or Par-Out Shift Register with Out Latches (3-State) |
597 | 8-Bit Shift Register with Input Flip-Flops | 604 | 16 to 8 Multiplexer (High Speed) |
624 | Voltage Controlled Oscillator | 628 | Voltage Controlled Oscillator |
629 | Voltage Controlled Oscillator | 640 | Octal Bus Transceiver; Inverting (3-State) |
641 | Octal Bus Transceiver | 645 | Octal Bus Transceiver |
646 | Octal Bus Transceiver/Register (3-State) | 652 | Octal Bus Transceiver/Register (3-State) |
670 | 4 x 4 Register File (3-State) | 674 | 16-Bit Shift Register 16-Bit Parallel Output |
682 | 8-Bit Magnitude Comparator | 684 | 8-Bit Magnitude Comparator |
688 | 8-Bit Magnitude Comparator | 821 | 10-Bit D-Type Flip-Flop |
825 | 8-Bit D-Type Flip-Flop | 827 | 8-Bit Buffer/Line Driver |
841 | 10-Bit Transparent Latch | 843 | 9-Bit Transparent Latch |
902 | Hex Buffer (TTL Interface) | 906 | Open Drain Buffer (Active Pull Down) |
908 | Dual High Voltage CMOS Driver | 912 | Display Controller 6 Digit 8 Segment |
914 | Hex Schmitt Trigger External Voltage Inputs | 922 | 16 Key Keyboard Encoder |
923 | 20 Key Keyboard Encoder | 925 | 4 Digit Counter Multiplexed 7 Segment Drive |
2244 | Octal Tri-State Buffer with Resistor | 2245 | Octal Tri-State Transceiver with Resistor |
3245 | Octal Tri-State Translating Transceiver | 3257 | Quad 2:1 Mux/Demux Bus Switch |
3383 | Octal Bus Exchange Switch | 3384 | 10-Bit Bus Switch |
4002 | Dual 4-Input NOR Gate | 4015 | Dual 4-Bit Serial-In/Parallel-Out Shift Register |
4016 | Quad Bilateral Switches | 4017 | Johnson Decade Counter with 10 Decoded Outputs |
4020 | 14-Stage Binary Ripple Counter | 4024 | 7-Stage Binary Ripple Counter |
4040 | 12-Stage Binary Ripple Counter | 4046 | Phase Locked Loop |
4049 | Hex Inverting High-to-Low Level Shifter | 4050 | Hex High-to-Low Level Shifter |
4051 | 8-Channel Analog Multiplexer/Demultiplexer | 4052 | Dual 4-Channel Analog Multiplexer/Demultiplexer |
4053 | Triple 2-Channel Analog Multiplexer/Demultiplexer | 4059 | Programmable Divide-By-N Counter |
4060 | 14-Stage Binary Ripple Counter with Oscillator | 4066 | Quad Bilateral Switches |
4067 | 16-Channel Analog Multiplexer/Demultiplexer | 4075 | Triple 3-Input OR Gate |
4078 | 8-Input NOR/OR Gate | 4094 | 8-Stage Shift-and-Store Bus Register |
4245 | Octal Tri-State Translating Transceiver | 4316 | Quad Bilateral Switches |
4351 | 8-Channel Analog Multiplexer/Demultiplexer with Latch | 4353 | Triple 2-Channel Analog Multiplexer/Demultiplexer with Latch |
4511 | BCD To 7-Segment Latch/Decoder/Driver | 4514 | 4-to-16 Line Decoder/Demultiplexer with Input Latches |
4515 | 4-to-16 Line Decoder/Demultiplexer with Input Latches; Inverting | 4518 | Dual Synchronous Up Counter |
4520 | Dual 4-Bit Synchronous Binary Counter | 4538 | Dual Retriggerable Precision Monostable Multivibrator |
5555 | Programmable Delay Timer with Oscillator | 6323 | Programmable Ripple Counter with Oscillator (3-State) |
7014 | Hex Non-Inverting Precision Schmitt-Trigger | 7030 | 9-Bit x 64-Word FIFO Register (3-State) |
7046 | Phase-Locked-Loop with Lock Detector | 7266 | Quad 2-Input EXCLUSIVE-NOR Gate |
7403 | 4-Bit x 64-Word FIFO Register (3-State) | 7540 | Octal Schmitt Trigger Buffer/Line Driver; Inverting (3-State) |
7541 | Octal Schmitt Trigger Buffer/Line Driver (3-State) | 7731 | Quad 64-Bit Static Shift Register |
9114 | Nine Wide Schmitt Trigger Buffer; Open Drain Outputs; Inverting | 9115 | Nine Wide Schmitt Trigger Buffer; Open Drain Outputs |
9323 | Programmable Ripple Counter with Oscillator (3-State) | 22106 | 8x8 Crosspoint Switch |
40103 | 8-Bit Synchronous Binary Down Counter | 40105 | 4-Bit x 16-Word FIFO Register |
: The 7400 series of TTL integrated circuit SSI devices were historically important as the first widespread family of IC devices. ... A Motorola 68000-based computer with various TTL chips. ... Optical Microscope image of an integrated circuit showing defects in the aluminium layer deposition. ...
Family | Description | Family | Description |
74 | True TTL | 74L | Low power |
74S | Schottky | 74H | High speed |
74LS | Low power - Schottky | 74AS | Advanced - Schottky |
74ALS | Advanced - Low power - Schottky | 74F(AST) | Fast - (Advanced - Schottky) |
74C | CMOS...................check Vcc levels | 74HC (U) | High speed - CMOS (Unbuffered output) |
74HCT | High speed - CMOS - TTL inputs | 74AHC | Advanced - High speed - CMOS |
74AHCT | Advanced - High speed - CMOS - TTL inputs | 74FCT (-A,-T,-AT) | Fast - CMOS - TTL inputs (speed variations) |
74AC | Advanced - CMOS | 74ACT | Advanced - CMOS - TTL inputs |
74FACT | AC, ACT (Q) series | 74ACQ | Advanced - CMOS - Quiet outputs |
74ACTQ | Advanced - CMOS - TTL inputs - Quiet outputs | ||
Bus Driver Families | |||
74ABT | Advanced - BiCMOS - Technology | 74ABTE | ABT - Enhanced Transceiver Logic |
74ABTH | Advanced - BiCMOS - Technology - bus Hold | 74BCT | BiCMOS - TTL inputs |
74BTL | Backplane - Transceiver - Logic (BiCMOS) | 74FB | Futurebus+ |
74GTL | Gunning - Transceiver - Logic | 74GTLP | GTL - Plus |
Low Voltage Families | |||
74ALB | Advanced - Low Voltage - BiCMOS | 74LV (U) | Low - Voltage (Unbuffered output) (CMOS) |
74LVC (R) (U) | LV - CMOS (damping Resistor)(Unbuffered output) | 74LVCH | Low - Voltage - CMOS - bus Hold |
74ALVC | Advanced - Low - Voltage - CMOS | 74LVT (R) (U) | LV - TTL (damping Resistor(Unbuffered output) (BiCMOS) |
74LVTZ | Low - Voltage - TTL - High Impedance power-up | 74ALVC (R) ALV | CMOS (bus Hold) (damping Resistor) |
74ALVCH | Advanced - Low - Voltage - CMOS - bus Hold | 74LCX | LV - CMOS (operates with 3v and 5v supplies) |
74VCX | LV - CMOS (operates with 1.8v and 3.6v supplies |
LVC Family is optimised for 3.3v, 5v input tolerant, 3.5ns typical propagation, can drive 24mA
HCT has VIH of 2V so useful for interfacing 3.3v to 5v
HC & LVC have 5V tolerant inputs useful for interfacing 5v to 3.3v