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 |
| 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 |
| 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 |
| 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.
Build Something Useful This Evening
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You should add a page for a XNOR gate with standard/gates to complement the 74266 with open collector gates , you’ve done that for some of the other logic gates you’ve taught us about on the page.
Just added it!
74×14 has errors
Fixed. Let me know if you see more errors.
Many thanks for this
It’d be great to see a 74xx240 page!
hey, great work, but I can’t find most of what I have:
7447
7476
7486
7474
74155
74151
Great resource – a list with pinouts on one page is very useful and this is one of the few places to find it. Not sure the 4000 series is relevant these days (74HC00 and CD74HC4000 series are the common choices these days surely?)
Definitely good to have are latches/flip-flops, selectors and decoders, so 74, 157, 151, 138 etc, and probably the handy 245 octal buffer even?