74HC04 Pinout

74HC04 Hex Inverter · Hex inverter (NOT gate); commonly used for logic-level shaping/inversion.

DIP-14 Logic 14 pins No backend · 100% client-side

1A 1

1Y 2

2A 3

2Y 4

3A 5

3Y 6

GND 7

74HC04 DIP-14

14 VCC

13 6A

12 6Y

11 5A

10 5Y

9 4A

8 4Y

PowerGNDInputOutputI/OControl

Pin	Name	Type	Function
1	1A	Input	Inverter 1 input
2	1Y	Output	Inverter 1 output
3	2A	Input	Inverter 2 input
4	2Y	Output	Inverter 2 output
5	3A	Input	Inverter 3 input
6	3Y	Output	Inverter 3 output
7	GND	GND	Ground
8	4Y	Output	Inverter 4 output
9	4A	Input	Inverter 4 input
10	5Y	Output	Inverter 5 output
11	5A	Input	Inverter 5 input
12	6Y	Output	Inverter 6 output
13	6A	Input	Inverter 6 input
14	VCC	Power	Supply + (2–6V)

How to · reading it

How to read the 74HC04 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.

FAQ

How do I handle unused input pins?

CMOS inputs must not float; tie unused inputs to GND or VCC to avoid noise and excess current draw.

What's the difference between 74HC and 74LS04?

HC is CMOS (low power, wide voltage 2–6V); LS is TTL (5V). Same pinout, different electrical characteristics.

Data source

Pinout data comes from NXP/TI 74HC04 datasheet (standard DIP-14 numbering). Refer to the actual device datasheet as authoritative for the pinout.