74HC595 Shift Register 8-Bit

Overview

The 74HC595 is an 8-bit serial-in, parallel-out shift register IC that allows you to expand the output pins of your microcontroller. This is essential for projects that require controlling many LEDs, 7-segment displays, or other digital outputs while conserving precious GPIO pins. With the 74HC595, you can drive up to 8 outputs using just 3 microcontroller pins (data, clock, latch), making it a fundamental component for efficient circuit design.

Key Features

• 8-bit serial-in, parallel-out shift register – Expands your microcontroller's output capabilities.
• 3-state outputs – Outputs can be disabled for bus sharing.
• Cascadable – Chain multiple 74HC595 ICs to control even more outputs (e.g., 16, 24, 32 outputs) with the same 3 control pins.
• Wide operating voltage – 2V to 6V, compatible with 3.3V and 5V systems.
• High-speed operation – Shift clock up to 100 MHz (typical) for fast data transfer.
• Latching outputs – Outputs update simultaneously when the latch pin is triggered, preventing flicker.
• Standard DIP-16 package – Easy to use on breadboards and PCBs.

Technical Specifications

• Supply Voltage (VCC): 2V to 6V DC
• Shift Clock Frequency: Up to 100 MHz (typical)
• Output Current: ±6 mA per output (source/sink)
• Operating Temperature Range: -40°C to +85°C
• Package Type: DIP-16 (through-hole)
• Logic Family: HC (High-speed CMOS)
• Input/Output Compatibility: TTL and CMOS compatible

Applications & Use Cases

• LED matrix control – Drive multiple LEDs with minimal pins.
• 7-segment displays – Control multiple digits for clocks, counters, or digital readouts.
• Relay and motor drivers – Expand output pins for automation projects.
• Shift register cascading – Build large output arrays for complex displays or signage.
• Prototyping – Essential for Arduino, Raspberry Pi, and other microcontroller projects.
• Educational projects – Learn about serial communication and shift registers.

What's Included

• 1 x 74HC595 Shift Register IC (DIP-16)

Compatibility

• Microcontrollers: Arduino, Raspberry Pi, ESP32, STM32, PIC, and any 3.3V/5V logic microcontroller.
• Logic Levels: Works with both 3.3V and 5V logic levels.
• Breadboard-friendly: DIP-16 package fits standard breadboards.
• Cascadable: Connect multiple ICs together for expanded output capacity.

MOKWN Recommendation

The 74HC595 is a must-have for any electronics enthusiast or professional. Its ability to expand outputs is invaluable for complex projects, and its simplicity makes it perfect for beginners. At MOKWN, we recommend keeping a few in your parts drawer – they're affordable, versatile, and reliable. Whether you're building a scrolling LED sign or a digital clock, the 74HC595 will simplify your wiring and free up your microcontroller for other tasks.