PCF8574 / PCF8574T I/O Expansion Board – I2C I/O Expander Module

About this item

I2C I/O expansion: The PCF8574 / PCF8574T module expands the number of digital input/output pins available on your microcontroller using the I2C interface, allowing you to control more devices with fewer pins.

Easy integration: With its simple I2C communication protocol, the module connects easily to Arduino, Raspberry Pi, ESP32, STM32, and other microcontroller platforms without complex wiring.

8 additional I/O pins: Each module provides 8 bidirectional digital I/O pins, ideal for driving LEDs, reading buttons, controlling relays, and managing other digital peripherals.

Address configurable: The module supports multiple I2C addresses via onboard jumpers, enabling you to connect several PCF8574 modules on the same I2C bus for large‑scale expansion.

Low power consumption: Designed for efficient operation, the PCF8574 chip consumes very little power, making it suitable for battery‑powered or low‑energy projects.

Compact and practical design: Its small form factor makes it easy to integrate into projects with limited space while keeping wiring clean and organized.