Features:
I2C interface, I / O expansion module, two I / O scalability 8 I / O (up to 8 simultaneous use the PCF8574 expanded to 64 I / O)
Most important feature:
- Supports two interface types access target board: Pin or row seat,
- Support I2C bus cascade (by pin header row seat docking methods can be used simultaneously multiple I2C modules)
- Typical application: I / O resource shortage MCU I / O expansion
- Main resources: the PCF8574 I2C interface, 8-bit parallel

Module function:
- This is the I/O extended module, which use for I2C interface, you can use two of the module to extend 8 I/O.
- Support cascading, and you can use at most 8 modules to extend 64 I/O at the same time.
- Every 2 seconds, make P0-P7 port output High level, Low level, and put 3 toggle switches to ON, the address of module is 0x27.
- Can be changed the address by set toggle switch
- PCB Size: 36 x 16mm/1.41*0.62"

Package included:6 PCF8574T I/O extended module