• Description

PCF8574 to IO Expansion Board is used as full controlled adapter between I2C bus to 8 bit parallel bus. This module supports I2C cascading, allowing multi boards connection to the I2C bus at the same time by connecting the pin header and a female connector. On board jumper select for I2C bus pull HI disable/ enable(default) and addressing. 

PCF8574T I2C BreakOut Control 8-Relay by Knight Rider code - YouTube

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Feature:

• Supply Voltage range 2.5V - 6V
• I2C address range 20h - 27h(default)

  A2	A1	A0	Address
  open	open	open	27h
  open	open	on	26h
  open	on	open	25h
  open	on	on	24h
  on	open	open	23h
  on	open	on	22h
  on	on	open	21h
  on	on	on	20h

• Jumper select I2C addressing
• Jumper select I2C bus pull HI
• Many of Ardiuno Raspberry library support 
  
• I2C standard, work only 4 wires. VCC GND SCL SDA
  
• 8-bit bi-directional IO parallel port with I2C interface

PCF8574 I2C Bidirectional I/O Expander Relay Control SmartHome Ardiuno Raspberry

• Product Code: PCF8574-IO
• Availability: In Stock

• $3.49