IC Pinouts / 74HC08
74HC08 Pinout
74HC08 Quad AND Gate · Quad 2-input AND gate.
DIP-14 Logic 14 pins No backend · 100% client-side
1A 1
1B 2
1Y 3
2A 4
2B 5
2Y 6
GND 7
74HC08 DIP-14
14 VCC
13 4B
12 4A
11 4Y
10 3B
9 3A
8 3Y
PowerGNDInputOutputI/OControl
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1A | Input | Gate 1 input A |
| 2 | 1B | Input | Gate 1 input B |
| 3 | 1Y | Output | Gate 1 output (1A·1B) |
| 4 | 2A | Input | Gate 2 input A |
| 5 | 2B | Input | Gate 2 input B |
| 6 | 2Y | Output | Gate 2 output |
| 7 | GND | GND | Ground |
| 8 | 3Y | Output | Gate 3 output |
| 9 | 3A | Input | Gate 3 input A |
| 10 | 3B | Input | Gate 3 input B |
| 11 | 4Y | Output | Gate 4 output |
| 12 | 4A | Input | Gate 4 input A |
| 13 | 4B | Input | Gate 4 input B |
| 14 | VCC | Power | Supply + (2–6V) |
How to read the 74HC08 pinout
- 01
Find pin 1
One end of the chip has a half-circle notch or a dot; with the notch facing up, the top-left pin is pin 1.
- 02
Count counter-clockwise
Count counter-clockwise from pin 1: go down the left side first, then up the right side from the bottom.
- 03
Check the table below
Look up each pin's function by number in the table below; power/ground are color-coded, and alternate-function signals are in parentheses.
Frequently asked questions
How many AND gates are in one chip?
4 independent 2-input AND gates, sharing pin 7 GND and pin 14 VCC.
Do I need to handle unused gates?
Tie unused gates' inputs to GND or VCC; don't leave them floating (floating CMOS inputs jitter and draw current).
Data source
Pinout data comes from NXP/TI 74HC08 datasheet (standard DIP-14 numbering). Refer to the actual device datasheet as authoritative for the pinout.