Description

The PCF8575 I/O Expander Module is an efficient and versatile solution for extending the I/O capabilities of your Arduino projects. With 16 individually addressable I/O pins, this module allows you to scale up your projects with ease, all while using just two I2C pins for communication. Whether you're adding simple relays, buzzers, buttons, or LEDs, the PCF8575 makes it easy to expand your project’s control options. Its open-drain interrupt output pin also allows for input change interrupts, making it ideal for a wide range of applications.

Why Choose the PCF8575 I/O Expander Module?

If you're running out of I/O pins on your Arduino board, the PCF8575 I/O Expander Module is the perfect solution. With just two I2C pins, you can control up to 16 input/output pins, making it ideal for expanding your project’s capabilities. It supports a range of devices, including relays, buzzers, buttons, and LEDs, and can be easily integrated with your existing Arduino setup. The ability to modify the I2C address and the open-drain interrupt output for input change makes it highly customizable, allowing you to build more complex systems with ease.

Key Features

16 I/O Pins: 16 individually addressable input/output pins that can be configured as either inputs or outputs.
I2C Communication: Expands your project using only two I2C pins for control, simplifying wiring.
Interrupt Support: Open-drain interrupt output pin for input change detection.
Adjustable Voltage: Operating voltage range of 2.5V to 5.5V DC for flexibility in power sources.
Customizable I2C Address: Default I2C address of 0x20, which can be modified by soldering A1 and A2 selection pads.
Compact and Efficient: Ideal for use with UNO R3 and other MCU-controlled devices, such as relays, buzzers, buttons, and LEDs.

Technical Specifications

Operating Voltage: 2.5V to 5.5V DC
Working Current: 100mA (maximum)
I2C Address: Default 0x20, adjustable via A1 and A2 pads
Number of Pins: 16 individually addressable input/output pins
Interrupt Output Pin: Open-drain interrupt for input change detection
Available Library: PCF8575 library for easy integration
Applications: Compatible with UNO R3 and other MCUs for controlling relays, LEDs, buzzers, and more