XRT73L04B集成电路（IC）的电信规格书PDF中文资料

GENERAL DESCRIPTION

The XRT73L04B, 4-Channel, DS3/E3/STS-1 Line In terface Unit is a low power CMOS version of the XRT73L04A and consists of four independent line transmitters and receivers integrated on a single chip designed for DS3, E3 or SONET STS-1 applications.

Each channel of the XRT73L04B 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

• Incorporates an improved Timing Recovery circuit and is pin and functional compatible to XRT73L04A

• 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 Thermally Enhanced 144 pin LQFP package

APPLICATIONS

• Digital Cross Connect Systems

• CSU/DSU Equipment

• Routers

• Fiber Optic Terminals

• Multiplexers

• ATM Switches