The 7400-series Integrated Circuits (IC) is a classic series of chips. It has a bunch of useful basic features such as logic gates, 7-segment decoders, counters, and more. These are great building blocks for digital electronics. This series is an alternative to the 4000 series which has a lot of the same functionality.
Below you’ll find a non-exhaustive list of the most common 7400-series chips.
Click on the IC number of a chip to learn more about its pins, functions, and example circuits.
More ICs will be added. If you have a request, let me know in the comments!
| IC # | Pinout | Description |
|---|---|---|
| 74x00 |  | Quad 2-input NAND gate: An IC with four standard NAND gates. |
| 74x01 |  | Quad 2-input open-collector NAND gates: An IC with four open-collector NAND gates |
| 74x02 |  | Quad 2-input NOR gate: An IC with four standard NOR gates. |
| 74x03 |  | Quad 2-input open-collector NAND gates.: An IC with four open-collector NAND gates |
| 74x04 |  | Hex inverter/NOT-gate: An IC with six inverters (or NOT-gates) |
| 74x05 |  | Hex open-collector inverters: An IC with six open-collector inverters (NOT gates) |
| 74x06 |  | Hex open-collector inverters: An IC with six open-collector inverters that can sink 40 mA |
| 74x07 |  | Hex open-collector buffers: An IC with six open-collector buffers |
| 74x08 |  | Quad 2-input AND gate: An IC with four standard AND gates. |
| 74x09 |  | Quad 2-input open-collector AND gates.: An IC with four open-collector AND gates |
| 74x10 |  | Triple 3-input NAND gates: An IC with three 3-input NAND gates |
| 74x11 |  | Triple 3-input AND gates: An IC with three 3-input AND gates |
| 74x12 |  | Triple 3-input open-collector NAND gates: An IC with three 3-input open-collector NAND gates |
| 74x13 |  | Dual 4-Input NAND Gate Schmitt Trigger: An IC with two 4-Input NAND Gate Schmitt Trigger |
| 74x14 |  | Hex Schmitt-trigger inverters: An IC with six Schmitt-trigger inverters |
| 74x15 |  | Triple 3-input open-collector AND gates: An IC with three 3-input open-collector AND gates |
| 74x16 |  | Hex open-collector inverters: An IC with six open-collector inverters (NOT gates) |
| 74x17 |  | Hex open-collector buffers: An IC with six open-collector buffers |
| 74x18 |  | Dual 4-input NAND gate Schmitt trigger: An IC with two 4-input NAND gates |
| 74x19 |  | Hex Schmitt-trigger inverters: An IC with six Schmitt-trigger inverters |
| 74x20 |  | Dual 4-input NAND gates: An IC with two 4-input NAND gates |
| 74x21 |  | Dual 4-input AND gates: An IC with two 4-input AND gates |
| 74x22 |  | Dual 4-input AND gates: An IC with two 4-input open-collector NAND gates |
| 74x24 |  | Quad 2-input NAND gate Schmitt Trigger: An IC with four Schmitt-trigger NAND gates |
| 74x25 |  | Dual 4-input NOR gates with enable input: An IC with two 4-input NOR gates with enable input |
| 74x26 |  | Quad 2-input open-collector NAND gates: An IC with four open-collector NAND gates that supports output voltage of up to 15V |
| 74x27 |  | Triple 3-input NOR gates: An IC with three 3-input NOR gates |
| 74x28 |  | Quad 2-input NOR gates: An IC with four basic NOR gates and buffered outputs |
| 74x31 |  | Hex delay elements: An IC with six delay elements of 27.5ns, 46.5ns, and 6ns |
| 74x32 |  | Quad 2-input OR gates.: An IC with four basic OR gates |
| 74x33 |  | Quad 2-input open-collector NOR gates: An IC with four open-collector NOR gates |
| 74x37 |  | Quad 2-input NAND gates: An IC with four basic NAND gates and buffered output |
| 74x38 |  | Quad 2-input open-collector NAND gates: An IC with four open-collector NAND gates and buffered output |
| 74x40 |  | Dual 4-input NAND gates with buffered output: An IC with two 4-input NAND gates with buffered output |
| 74x42 |  | BCD to decimal decoder: An IC with 1-of-10 inverting decoder/demultiplexer |
| 74x48 |  | BCD to 7-segment decoder/driver: An IC with BCD to 7-segment decoder/driver (common cathode) |
| 74x51 |  | 2 x AND/NOR gates: An IC with one 2-wide 2-input AND/NOR gate, and one 2-wide 3-input AND/NOR gate. |
| 74x54 |  | 4-wide 2/3-input AND-NOR gate: An IC with a combination of four 2/3-input AND gates and a NOR gate |
| 74x55 |  | 2-wide 4-input AND-NOR gate: An IC with two 4-input AND gates connected to a NOR gate |
| 74x57 |  | Frequency Dividers: An IC with frequency dividers to generate one second timing pulses from 60 Hz |
| 74x58 |  | 2 x AND/OR gates: An IC with one 2-wide 2-input AND/OR gate, and one 2-wide 3-input AND/OR gate. |
| 74x73 |  | Dual J-K flip-flop: An IC with two negative-edge-triggered J-K flip-flops with reset |
| 74x74 |  | Dual D flip-flop: An IC containing two D flip-flops with set and reset |
| 74x75 |  | 4-bit bistable latches: An IC with four D latches |
| 74x76 |  | Dual J-K flip-flop: An IC with two J-K flip-flops with set and reset pins |
| 74x78 |  | Dual J-K flip-flop: An IC with two negative-edge-triggered J-K flip-flops |
| 74x83 |  | 4-bit full adder: An IC with a 4-bit binary full adder |
| 74x85 |  | 4-bit magnitude comparator: An IC that can compare two 4-bit numbers |
| 74x86 |  | Quad 2-input XOR gates.: An IC with four basic XOR gates |
| 74x90 |  | Decade counter: An IC with 4-bit asynchronous decade counter |
| 74x91 |  | 8-bit Shift Register: An IC with a serial-in serial-out shift register |
| 74x92 |  | Divide-by-twelve counter: An IC with 4-bit asynchronous divide-by-twelve counter |
| 74x93 |  | Divide-by-16 counter: An IC with 4-bit asynchronous divide-by-16 counter |
| 74x95 |  | Shift register: An IC with a 4-bit universal shift register |
| 74x96 |  | Shift register: An IC with a 5-bit shift register |
| 74x107 |  | Dual J-K flip-flop: An IC with two negative-edge-triggered J-K flip-flops |
| 74x109 |  | Dual J-K flip-flops: An IC with two J-K flip-flops with set and reset |
| 74x112 |  | Dual J-K flip-flops: An IC with two negative-edge-triggered J-K flip-flops |
| 74x113 |  | Dual J-K flip-flop: An IC with two negative-edge-triggered J-K flip-flops. |
| 74x114 |  | Dual J-K flip-flop: An IC with two negative-edge-triggered J-K flip-flops |
| 74x121 |  | Monostable Multivibrator / One-shot: An IC with Programmable output pulse width from 40 ns to 20 seconds |
| 74x122 |  | Monostable Multivibrator / One-shot: An IC that creates a programmable output pulse |
| 74x123 |  | Dual monostable multivibrators: An IC with two retriggerable monostable multivibrators. |
| 74x125 |  | Quad 3-state noninverting buffer: An IC with four tri-state non-inverting buffers |
| 74x126 |  | Quad 3-state noninverting buffer: An IC with four tri-state non-inverting buffers |
| 74x132 |  | Quad 2-input NAND Schmitt Triggers: An IC with four Schmitt Trigger NAND gates. |
| 74x133 |  | 13-input NAND gate: An IC with a NAND gate with 13 inputs. |
| 74x136 |  | Quad 2-input open-collector XOR gates.: An IC with four open-collector XOR gates |
| 74x137 |  | 3-to-8 decoder: An IC with 3-to-8 inverting decoder/demultiplexer |
| 74x138 |  | 3-to-8 decoder: An IC with 3-to-8 inverting decoder/demultiplexer |
| 74x139 |  | Dual 2-to-4 decoder/demultiplexer: An IC with two 1-of-4 inverting decoder/demultiplexers |
| 74x145 |  | 4-to-10 line decoder/demultiplexer: An IC with 1-of-10 open-collector BCD decoder |
| 74x147 |  | 10-to-4 line priority encoder: An IC with 10-to-4 line inverting priority encoder |
| 74x221 |  | Dual monostable multivibrators: An IC with two monostable multivibrators with Schmitt-trigger inputs |
| 74x237 |  | 3-to-8 decoder: An IC with 1-of-8 noninverting decoder/demultiplexer with address latches |
| 74x238 |  | 3-to-8 line decoder: An IC with a 3-to-8 line decoder/demultiplexer |
| 74x239 |  | Dual 2-to-4 line decoder: An IC that has two 2-to-4 line decoders with address latches |
| 74x240 |  | Octal 3-state buffers: An IC with eight 3-state inverting buffers/line drivers |
| 74x266 |  | Quad 2-input open-collector XNOR gates.: An IC with four open-collector XNOR gates |
| 74x595 |  | Serial-in parallel-out shift register: An IC with an 8-bit serial-in parallel-out shift register |
| 74x7001 |  | Quad 2-input Schmitt-trigger AND gates.: An IC with four Schmitt-trigger AND gates |
| 74x7002 |  | Quad 2-input Schmitt-trigger NOR gates.: An IC with four Schmitt-trigger NOR gates |
| 74x7032 |  | Quad 2-input Schmitt-trigger OR gates.: An IC with four Schmitt-trigger OR gates |
| 74x7266 |  | Quad 2-input XNOR gates.: An IC with four basic XNOR gates |
Good to know about the 7400 series:
- The output pins usually only support a few milliamps of sink or source current.
- Lots of manufacturers have made these throughout time, so you’ll often find the chip number with a prefix such as SN74xxx, MM74xxx, or DM74xxx.
- There is also a military-grade version that uses 54xxx instead of 74xxx.
- Most chips support a voltage supply of 5V.
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