Adafruit MCP23017 I2C GPIO Expander Breakout

OSHWA UID

US002068 Project Website

Certification Date

January 14, 2022

Country

United States of America

We like the MCP23017 as an expander for its simple capability. It runs from 3V or 5V logic and power, each GPIO drive up to 25mA as an output, or an input, with optional pullup. There are two IRQ pins that are configurable. With 3 address pins, you get 128 GPIO on one I2C bus! This GPIO expander uses a 4-pin Sparkfun Qwiic-compatible connector called STEMMA QT, which allows the sensor to communicate over I2C without needing to solder. Click the link labeled 'Project Website' to find out more.