PCF8574T I2C I/O Extension Board

SKU: VM00616

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The PCF8574T provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)). The PCF8574 IO Expansion Board features an I2C pinheader on one side and an I2C connector on the opposite side. Hence, it’s more flexible to connect the board to your development system. The board also supports I2C cascading, allowing the use of a multi modules connected to the I2C bus at the same time by connecting the pinheader and connector.

Technical Specification:

  • Operating Voltage (VDC): 3 ~ 5V
  • Interface: I2C
  • Ports: 8-bit parallel port
  • Size: 48mm*16mm*15mm (L*W*H)


  • Low Standby-Current Consumption of 10 μA Max
  • I 2C to Parallel-Port Expander
  • Open-Drain Interrupt Output
  • Compatible With Most Microcontrollers
  • Latched Outputs With High-Current Drive Capability for Directly Driving LEDs


  • Telecom Shelters: Filter Units
  • Servers
  • Routers (Telecom Switching Equipment)
  • Personal Computers
  • Personal Electronics
  • Industrial Automation
  • Products with GPIO-Limited Processors

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