PCF8574 IO Expansion Module

PCF8574 I2C IO Expansion Board

8 Input Output Pin Multiplexing Expansion Module Arduino Raspberry Pi Expansion

     It is a module that has the function of increasing the pin count over IIC communication for microprocessors. There is a PCF8574 IC on the board. It is used when the IO count is not enough. 8 inputs outputs are obtained over I2C. In addition, 8 boards can be connected one after another to multiply the pin count up to 64. When all DIP switches are in the ON position, the I2C address is 0x27.

Features:

•     Operating voltage: DC 3.3V / 5V
•     Communication:  IIC
•     8 bidirectional IO pins
•     Interrupt pin output
•     25mA current capacity
•     8 boards can be connected to the I2C line. Thus the IO count can be increased up to 64.
•     Address setting is done via the 3 position DIP Switch on the board.
•     Operating temperature:  -10C /  65C
•     Dimensions:   37mm x 16mm
•     Weight:  5gr

Pin Connections:

•     VCC: Supply positive pin DC 3.3V / 5V
•     GND: Supply ground pin
•     SDA: I2C SDA pin
•     SCL: I2C SCL pin

Address Setting:
Address (Hex)     A2        A1         A0
      0x20             LOW     LOW     LOW
      0x21             LOW     LOW     HIGH
      0x22             LOW     HIGH     LOW
      0x23             LOW     HIGH     HIGH
      0x24             HIGH     LOW     LOW
      0x25             HIGH     LOW     HIGH
      0x26             HIGH     HIGH     LOW
      0x27             HIGH     HIGH     HIGH

Package Contents :

•     1 pcs PCF8574 IO Expansion Module