74HC595 Serial-to-Parallel IO Expansion Module

Expand your microcontroller's output capabilities with the 74HC595 Serial-to-Parallel IO Expansion Module. Whether you're driving LED arrays, controlling shift registers, or building complex digital circuits, this compact SMD module lets you scale from 3 to 24 output pins using just 3 serial input lines — saving precious GPIO resources on your Arduino, ESP32, Raspberry Pi, or any 5V microcontroller platform.

Available in convenient multi-packs (1, 2, 5, 10, or 20 pieces), this module is an essential component for hobbyists, makers, and professional embedded developers alike.

Key Features

IC: 74HC595 shift register (SMD package)
Supply Voltage: 5V
Package Type: SMD (Surface Mount Device)
Function: Serial-in, parallel-out — expands 3 control pins into up to 8 (or 24 with daisy-chaining) output pins
Application: LED control, port expansion, digital output multiplexing
Condition: Brand new
Quantity Options: 1pc, 2pcs, 5pcs, 10pcs, 20pcs

Why Choose the 74HC595 IO Expansion Module?

The 74HC595 is a trusted, industry-standard shift register chip that enables serial-to-parallel conversion. Instead of dedicating multiple microcontroller pins to individual outputs, you send data serially and the module latches it to parallel outputs simultaneously. This is ideal for:

Driving LED strips and matrix displays
Controlling multiple relays or digital outputs
Cascading modules for large-scale pin expansion projects
Prototyping and breadboard-friendly embedded designs

Compatible With

Arduino (Uno, Mega, Nano, etc.)
ESP8266 / ESP32
Raspberry Pi (via SPI/GPIO)
STM32 and other 5V MCU platforms

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Frequently Asked Questions

Q: What does the 74HC595 IO Expansion Module do?

A: The 74HC595 Serial-to-Parallel IO Expansion Module converts a 3-wire serial input (data, clock, latch) from your microcontroller into up to 8 parallel output pins. Multiple modules can be daisy-chained to expand to 16, 24, or more outputs, making it perfect for LED control and digital output applications.

Q: Is the 74HC595 module compatible with Arduino and Raspberry Pi?

A: Yes! The module operates at 5V and is fully compatible with Arduino boards, Raspberry Pi (with level shifting if needed), ESP32, ESP8266, STM32, and most standard 5V microcontroller platforms. It interfaces easily via SPI or bit-banged serial communication.

Q: How many output pins can I get by daisy-chaining multiple 74HC595 modules?

A: Each 74HC595 module provides 8 parallel output pins. By connecting the serial output (Q7') of one module to the data input of the next, you can chain as many modules as needed. For example, 3 modules chained together give you 24 output pins — all controlled with just 3 microcontroller pins.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.