Analog Devices ADP5588
From MILEDROPEDIA
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.
Datasheet: File:ADP5588.pdf
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.
Datasheet: File:ADP5588.pdf