Descriptions:

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-offerirectional 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.

Features:

Size: 4x2.1cm/1.57x0.83inch

available library: PCF8575

Working voltage: 2.5 - 5.5V DC

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

Package included:

4pcs PCF8575 IO Expander Board Module I2C to 16IO

available library: PCF8575; I2C address: 0x20(default),can be modified by soldering A1 and A2 selection pads.
PCF8575 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-offerirectional input/output pins.
On board 3.3V level converter circuit, if you do not solder VCC-VDD pad, the PCF8575 level is 3.3V. If you solder it, the level will be the same with VCC.
Working voltage: 2.5 - 5.5V DC; Working current: 100mA(MAX);Application: Great for UNO R3 and other MCU to control simple relay, buzzer, button, led.
16 individually addressable pins.Each pin configurable for input or output.Open-drain interrupt output pin for input change interrupt.