The Microchip Technology MT8888CS1 is a DTMF transceiver IC designed for telecom applications. It operates within a 4.75V to 5.25V range and is housed in a 20-SOIC package.
The Microchip Technology MT8880CS1 is a DTMF Transceiver IC designed for telecom applications. It operates within a voltage range of 4.75V to 5.25V and comes in a 20-SOIC package.