GPIO Expansion I2C

Operating supply voltage 2.5 V to 6 V 
The PCF8574 IO Expansion Board is used as remote 8-bit I/O expander for I2C-bus. Up to 8 PCF8574 IO Expansion Board can be connected to the I2C-bus, providing up to 64 I/O ports.
PCF8574, I2C interface, 8-bit parallel port.
For the lack of I / O resources mcu to I / O expansion.
Supports two types of access to the target board interface: pin or row.
Supports I2C bus cascade (via pencil row docking methods used simultaneously several I2C modules).

Description:
If your IO port is not enough, you can use the PCF8575 expansion board to expand more IO ports. Only two wires are needed. SDA and SCL can realize the input and output control of 16 IO ports, which is very simple to use. The I2C signal can be simulated by software, and some microcontrollers with I2C interface can operate directly.

• Model: I2C GPIO expander x 8