GENERAL DESCRIPTION
The XRT73L00A DS3/E3/STS-1 Line Interface Unit is an improved version of the XRT73L00 and consists of a line transmitter and receiver integrated on a single chip and is designed for DS3, E3 or SONET STS-1 applications.

FEATURES
• Incorporates an improved Timing Recovery circuit and is pin and functional compatible to XRT73L00
• 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
• 5 V Tolerant pins
• -40°C to +85°C Operating Temperature Range
• Available in a 44 pin TQFP package

APPLICATIONS
• Interfaces to E3, DS3 or SONET STS-1 Networks
• CSU/DSU Equipment
• PCM Test Equipment
• Fiber Optic Terminals
• Multiplexers