ANALOG DEVICES ADP5588 English products handbook Rev C

The ADP5588 is an I/O port expander and keypad matrix designed for QWERTY type phones that require a large keypad matrix and expanded I/O lines. It features 18 GPIO port expander or 10 × 8 keypad matrix, configurable to GPIs, GPOs, and keypad rows or columns. It also has dual light sensor inputs, I2C interface, configurable pull-ups, and more.