GENERAL DESCRIPTION

The XRT73L03B, 3-Channel, DS3/E3/STS-1 Line Interface Unit is a low power CMOS version of the XRT73L03A and consists of three independent line transmitters and receivers integrated on a single chip designed for DS3, E3 or SONET STS-1 applications.

FEATURES

• Incorporates an improved Timing Recovery circuit and is pin and functional compatible to XRT73L03A

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

• Contains a 4-Wire Microprocessor Serial Interface

• Full Loop-Back Capability

• Transmit and Receive Power Down Modes

• Full Redundancy Support

• Uses Minimum External components

• Single +3.3V Power Supply

• Low power CMOS design

• 5V tolerant I/O

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

• Available in a 120 pin LQFP package

APPLICATIONS

• Digital Cross Connect Systems

• CSU/DSU Equipment

• Routers

• Fiber Optic Terminals

• Multiplexers

• ATM Switches