GENERAL DESCRIPTION

The XRT73L03 is a 3-Channel, E3/DS3/STS-1 Line Interface Unit designed for E3, DS3 or SONET STS-1 applications and consists of three independent line transmitters and receivers integrated on a single chip.

Each channel of the XRT73L03 can be configured to support the E3 (34.368 Mbps), DS3 (44.736 Mbps) or the SONET STS-1 (51.84 Mbps) rates. Each channel can be configured to operate in a mode/data rate that is independent of the other channels.

FEATURES

? Meets E3/DS3/STS-1 Jitter Tolerance Requirements

? Full Loop-Back Capability

? Transmit and Receive Power Down Modes

? Full Redundancy Support

? Contains a 4-Wire Microprocessor Serial Interface

? Uses Minimum External components

? Single +3.3V Power Supply

? 5V tolerant I/O

? -40°C to +85°C Operating Temperature Range

? Available in a Thermally Enhanced 120 pin TQFP package

APPLICATIONS

? Digital Cross Connect Systems

? CSU/DSU Equipment

? Routers

? Fiber Optic Terminals

? Multiplexers

? ATM Switches