Extend Serial I/O Unit (PCA9554PW)

Description

EXT.IO is a parallel port expander designed to provide additional I/O capabilities for projects. It integrates the PCA9554PW IO expander chip, which supports expansion up to 8 GPIO (General Purpose Input/Output) pins. EXT.IO can be used with a VCC voltage range of 2.3V to 5.5V and supports various operations such as open-drain, pull-up, and interrupt output.

By utilizing the I2C interface (Serial Clock – SCL and Serial Data – SDA), EXT.IO enables easy I/O expansion for most microcontrollers. It is particularly useful for developers who are dealing with limited I/O pins on their microcontroller and want to avoid the need for additional controllers or wasting resources.

EXT.IO serves as a valuable auxiliary unit, providing a simple and efficient solution for expanding I/O capabilities without the need for extensive hardware modifications or additional development efforts.

I2C address by default is 0x27, unless changed manually.

It’s difficult to foresee the needs of your project from the start. EXT.IO is the perfect solution for expanding the number of IO. It allows you to add new features, logic, timing and sensing to already highly integrated designs.

Product Features

• Expanded I/O number: 8
• GROVE interface, support UIFlow and Arduino
• Two Lego-compatible holes

Include

• 1x EXT.IO Unit
• 1x Grove Cable

Specification