This IC will allow you to expand the number of input and output pins on your microcontroller. It uses 3 I2C pins to give 8 general purpose input/output pins. It even includes a configurable interrupt output that can be set as active-high, active-low or open-drain.44 page data sheet available for download.Features: • 1.8 - 5.5VDC Input • Low standby current (less than 1µA)• 8 Configurable Input/Output Pins• 1.7MHz High Speed I2C Interface• External Reset Input