PCF8575 16 Bit I2C I/O Expander Module (16 Channel GPIO Expansion)

The PCF8575 16 Bit I2C I/O Expander Module is designed to expand the available GPIO of microcontrollers and development boards using the I2C communication interface. It provides 16 additional I/O pins that can be controlled through the I2C bus, reducing the number of microcontroller pins required.

The module supports address configuration for multiple expanders on the same I2C bus and is suitable for Arduino, ESP32, Raspberry Pi, embedded systems, automation projects, keypad interfacing, and display control applications.

Key Features -

• 16 bit GPIO expansion through I2C interface

• Compatible with I2C, IIC and SMBus communication

• 16 configurable input/output pins

• Adjustable I2C address

• Wide operating voltage range

• Reduces GPIO requirements of the host controller

• Compact PCB module design

Specifications -

• IC Model = PCF8575

• Operating Voltage = 2.5V-5.5V DC

• Operating Current = Up to 100mA

• Default I2C Address = 0x20

• Address Configuration = Adjustable using A1 and A2 pads

• Number of I/O Pins = 16

• Communication Interface = I2C/IIC/SMBus

• Application = GPIO expansion and embedded control

Applications -

• Arduino GPIO expansion

• ESP32 and Raspberry Pi projects

• Keypad and button interfacing

• LCD and display control

• Industrial automation

• Relay and actuator control

• Embedded system prototyping