PCF8575 16-bit I/O Expansion Modules - I2C interface

No matter how many ports an Arduino board has, they never seem to be enough for the cool new project you have in mind. Luckily there is a solution. The Arduino has both I2C and SPI pins, and there are a number of I2C and SPI GPIO chips, and modules built with those chips.

Features

• Based on the I2C interface I/O expansion modules
• Two I/O can be extended to eight  (up to simultaneous use 8 PCF8574, expanded to 64 I/O)
• 2 supports I2C bus cascade (via pin, row seat docking methods can be used simultaneously multiple I2C modules)
• Compatible with Arduino and Raspberry Pi

Specifications

• 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.
• Size: 4x2.1cm

Package Included

1 x PCF8575 I/O Expansion Modules