PCF8575 Remote 16 Bits I2C IIC SMBus I/O Expander Module

1. PCF8575
2. Operating voltage: 2.5-5.5VDC
3. Operating current: 100mA (max)
4. I2C address: 0x20 (default), can be changed by soldering A1 and selection pads A2.

Features:

1. 16 individually addressable pins.
2. Each pin configurable for input or output
3. Open drain interrupts output pin for input change interrupt.
4. Ideal for R3 and other MCUs to simple relay, buzzer, button, led.