PCF8575 Remote 16 Bits I2C IIC SMBus I/O Expander Module

The PCF8575 I2C 16-bit I/O Expander Module is designed to expand the number of digital input and output pins of a microcontroller using the I2C communication protocol. It allows control of up to 16 GPIO pins while using only two I2C lines, making it ideal for applications where GPIO availability is limited.

Technical Specifications:

• IC: PCF8575
  
• I/O Channels: 16-bit bidirectional GPIO
  
• Communication Interface: I2C
  
• I2C Address Range: 0x20 to 0x27
  
• Operating Voltage: 2.5V to 5.5V
  
• Logic Level Compatibility: 3.3V and 5V
  
• Maximum I2C Speed: 400 kHz
  
• Interrupt Output: Active-low INT pin
  
• Onboard Pull-up Resistors: Available for I2C lines
  
• Module Pins: VCC, GND, SDA, SCL, INT, P0–P17
  
• Mounting Holes: Yes

Features:

• Expands microcontroller GPIO by 16 pins
  
• Each pin configurable as input or output
  
• Low power consumption
  
• Supports multiple devices on the same I2C bus
  
• Interrupt output for efficient input monitoring
  
• Simple interface and easy integration
  
• Compact module design

Applications:

• GPIO expansion for Arduino, ESP32, ESP8266, Raspberry Pi
  
• LED matrix and display control
  
• Keypad and button input expansion
  
• Relay and switch control
  
•  Industrial automation systems