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PCF8574 I/O Expansion Mini Board

The PCF8574 I/O Expansion Mini Board is a quick and easy solution to expanding and adding output ports to your control system. This PCF8574 board connects to a standard I²C bus and adds an additional 8 output ports to your system. A total of 8 of these PCF8574 boards can be added to a single I²C bus with each board having a unique address.

The PCF8574 Mini Board includes the Philips Semiconductor PCF8574 I/O Expansion IC together with selectable pull-up resistors for the I²C Bus. The output connections use a standard IDCC connector, and can be easily connected to another microcontroller board. A set of 3 jumpers are included on the board for address selection.

The PCF8574 I/O Expansion Mini Board is a great way of extending the number of output points available for your control system.

Part Code: MINIPCF8574


  • Includes the Philips Semiconductor PCF8574 IC
  • Connects directly to a standard I²C Bus
  • Selectable Address enabling a total of 8 Boards to be connected to a single I²C Bus
  • Selectable Pull-Up Resistors Included
  • Standard IDCC Connector for Output Termination
  • Suitable for use with Arduino Boards and Most Microcontrollers
  • Board Dimensions: 45 x 55 mm

Technical Data