74HC595 Pinout

74HC595 Shift Register · 8-bit serial-in parallel-out shift register with latch; commonly used to expand IO / drive 7-segment displays.

DIP-16 Logic 16 pins No backend · 100% client-side

Q1(QB) 1

Q2(QC) 2

Q3(QD) 3

Q4(QE) 4

Q5(QF) 5

Q6(QG) 6

Q7(QH) 7

GND 8

74HC595 DIP-16

16 VCC

15 Q0(QA)

14 DS(SER)

13 OE

12 STCP(RCLK)

11 SHCP(SRCLK)

10 MR(SRCLR)

9 Q7S(QH')

PowerGNDInputOutputI/OControl

Pin	Name	Type	Function
1	Q1 · QB	Output	Parallel output 1
2	Q2 · QC	Output	Parallel output 2
3	Q3 · QD	Output	Parallel output 3
4	Q4 · QE	Output	Parallel output 4
5	Q5 · QF	Output	Parallel output 5
6	Q6 · QG	Output	Parallel output 6
7	Q7 · QH	Output	Parallel output 7
8	GND	GND	Ground
9	Q7S · QH'	Output	Serial output (cascades to the next chip's DS)
10	MR · SRCLR	Control	Shift register clear (active-low)
11	SHCP · SRCLK	Control	Shift clock (shifts on rising edge)
12	STCP · RCLK	Control	Latch clock (updates output on rising edge)
13	OE	Control	Output enable (active-low)
14	DS · SER	Input	Serial data input
15	Q0 · QA	Output	Parallel output 0
16	VCC	Power	Supply + (2–6V)

How to · reading it

How to read the 74HC595 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 cascade multiple chips?

Connect this chip's pin 9 Q7S to the next chip's pin 14 DS, with the clock/latch lines in parallel, to chain into 16/24… bits.

How do I connect OE (pin 13)?

Active-low output enable. Tie it to ground for a fixed output; drive it with PWM for global blanking / brightness control.

What's the difference between SHCP and STCP?

SHCP shifts data in bit by bit; STCP latches the shifted 8 bits to the outputs all at once. Shift first, then latch.

Data source

Pinout data comes from NXP/TI 74HC595 datasheet (standard DIP-16 numbering). Refer to the actual device datasheet as authoritative for the pinout.