• Description

PCF8574AT 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 3Fh - 38h(default)

  A2	A1	A0	Address
  open	open	open	38h
  open	open	on	39h
  open	on	open	3Ah
  open	on	on	3Bh
  on	open	open	3Ch
  on	open	on	3Dh
  on	on	open	3Eh
  on	on	on	3Fh

• 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

PCF8574AT I2C Bidirectional I/O Expander Relay Control SmartHome Ardiuno Raspberry

• Product Code: PCF8574AT-IO
• Availability: In Stock

• $4.49