DESCRIPTION

The TERIDIAN 73M1903C Analog Front End (AFE) IC includes fully differential hybrid driver outputs, which connect to the telephone line interface through a transformer-based DAA. The receive pins are also fully differential for maximum flexibility and performance. This arrangement allows for the design of a high performance hybrid circuit to improve signal to noise performance under low receive level conditions, and compatibility with any standard transformer intended for PSTN communications applications.

Features

• Two pairs of software selectable transmit

differential outputs for worldwide impedance

driver implementations.

• Up to 56kbps (V.92) performance

• Programmable sample rates (7.2-16.0kHz)

• Reference clock range of 1-40MHz

• Crystal frequency range of 4.9-27MHz

• Master or slave mode operation and daisy

chain configurable synchronous serial Host

interface

• Low power modes

• Fully differential receiver and transmitter

Drivers for transformer interface

• 3.0V – 3.6V operation

• 5V tolerant I/O

• Industrial temperature range (-40 to +85°C)

• JATE compliant transmit spectrum

• Package options: 32 pin QFN

Applications

• Central site server modems

• Set Top Boxes

• Personal Video Recorders (PVR)

• Multifunction Peripherals (MFP)

• Fax Machines

• Internet Appliances

• Game Consoles

• Point of Sale Terminals

• Automatic Teller Machines

• Speaker Phones

• Digital Answering Machines

• RF Modems