OPRN-SMART PCF8575 IO Expander Module I2C to 16IO for Arduino

Highlights

Have you run out of I/O pins? This great module allows the user to expand up to 16 I/O using only two I/O for control! The PCF8575 is controlled through an I2C interface and features 16-bits of quasi-bidirectional input/output pins.

On board 3.3V level converter circuit, if you donot solder VCC-VDD pad, the PCF8575 level is 3.3V. If you solder it, the level will be the same with VCC.

Arduino available library: PCF8575

Working voltage: 2.5 - 5.5VDC

Working current: 100mA(MAX)

I2C address: 0x20(default),can be modified by soldering A1 and A2 selection pads.

16 individually addressable pins.

Each pin configurable for input or output.

Open-drain interrupt output pin for input change interrupt.

Great for Arduino UNO R3 and other MCU to control simple relay, buzzer, button, led.

Specification