Description

The MT9196 Integrated Digital Phone Circuit (IDPC) is designed for use in digital phone products. The device

incorporates a built-in Filter/Codec, digital gain pads, DTMF generator and tone ringer. Complete telephony interfaces are provided for connecting to handset and speakerphone transducers. Internal register access is provided through a serial microport compatible with various industry standard micro-controllers.

Features

• Programmable m-Law/A-Law CODEC and Filters

• Programmable CCITT (G.711)/sign-magnitude coding

• Programmable transmit, receive and side-tone gains

• Digital DTMF and single tone generation

• Fully differential interface to handset transducers

• Auxiliary analog interface

• Interface to ST-BUS/SSI (compatible with GCI)

• Serial microport control

• Single 5 volt supply, low power operation

• Anti-howl circuit for group listening speakerphone applications

Applications

• Digital telephone sets

• Wireless telephones

• Local area communications stations