// ICs & Logic

74HC595

The 74HC595 is an 8-bit shift register with output latches, used to add extra digital output pins to a microcontroller using only 3 control lines. Multiple ICs can be daisy-chained to expand to 16, 24, or more outputs.

// Specifications

Supply Voltage

2V – 6V

Output Current

35mA per pin

Clock Speed

Up to 100 MHz

Package

DIP-16 / SOIC-16

Logic Family

High-speed CMOS

Outputs

8 parallel

// Pin Reference Table

Pin	Name	Function	Type
1-7	Q1–Q7	Parallel data outputs 1 to 7	I/O
8	GND	Ground	GND
9	Q7S	Serial output for daisy-chaining	BUS
10	MR	Master reset, active low	I/O
11	SHCP	Shift register clock	BUS
12	STCP	Storage register clock, latch	BUS
13	OE	Output enable, active low	I/O
14	DS	Serial data input	BUS
15	Q0	Parallel data output 0	I/O
16	VCC	Supply voltage	PWR