XRT73L03A

www.DataSheet4U.com XRT73L03A 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT REV. 2.0.4 OCTOBER 2003 GENERAL DESCRIPTION The XRT73L03A, 3-Channel, DS3/E3/STS-1 Line Interface Unit is an improved version of the XRT73L03 and consists of three independent line transmitters and receivers integrated on a single chip designed for DS3, E3 or SONET STS-1 applications. Each channel of the XRT73L03A 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. In the transmit direction, each channel encodes input data to either B3ZS (DS3/STS-1) or HDB3 (E3) format and converts the data into the appropriate pulse shapes for transmission over coaxial cable via a 1:1 transformer. In the receive direction, the XRT73L03A performs equalization on incoming signals, performs Clock Recovery, decodes data from either B3ZS or HDB3 format, converts the receive data into TTL/CMOS format, checks for LOS or LOL conditions and detects and declares the occurrence of Line Code Violations. FEATURES Incorporates an improved Timing Recovery circuit and is pin and functional compatible to XRT73L03 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 5V...