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SX1509 16 Output I/O Expander Breakout jelpss your microcontroller connect to 16 GPIO pins using two wires.
Using the I2c interface this expander has been designed for multiple functions.
Are you low on I/O? No problem! The SX1509 can leverage your I2C interface for 16 extra channels of GPIO. And that's not all! This handy device also contains a fully programmable LED driver and a keypad scanning engine which enables continuous keypad monitoring of up to 64 keys! Since the I/O banks can operate between 1.2V and 3.6V (5.5V tolerant) independent of both the core and each other, this device can also work as a level-shifter.
This breakout board makes it easy to prototype using the SX1509 so you can add more I/O onto your Arduino or I/O limited controller. We've even spun up an Arduino Library to get you started!