PCF8574 I/O Expander Module (I2C)

Overview

PCF8574 I2C to 8‑bit I/O expander. Adds 8 digital GPIO pins via I2C. Interrupt output. 3.3–5V compatible.

Key Features

• 8‑bit input/output (configurable)
• I2C interface (address selectable)
• Interrupt output
• 3.3–5V compatible

Specifications

• Supply: 2.5–6V

Dimensions & Weight

• Length: ~25 mm
• Width: ~15 mm
• Weight: ~3 g

Package Includes

• 1 × PCF8574 Module

Applications

• Expanding GPIO for microcontrollers
• Reading switches and driving LEDs
• I2C sensor interfacing