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 |
| 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 |  | |
| 74x25 |  | Dual 4-input NOR gates with enable input: An IC with two 4-input NOR gates with enable input |
| 74x27 |  | Triple 3-input NOR gates: An IC with three 3-input NOR gates |
| 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 |
| 74x40 |  | Dual 4-input NAND gates with buffered output: An IC with two 4-input NAND gates with buffered output |
| 74x86 |  | Quad 2-input XOR gates.: An IC with four basic XOR gates |
| 74x132 |  | Quad 2-input NAND Schmitt Triggers: An IC with four Schmitt Trigger NAND gates. |
| 74x136 |  | Quad 2-input open-collector XOR gates.: An IC with four open-collector XOR gates |
| 74x266 |  | Quad 2-input open-collector XNOR gates.: An IC with four open-collector XNOR gates |
| 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.
