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XRT73L00A

Exar Corporation
Part Number XRT73L00A
Manufacturer Exar Corporation
Description E3/DS3/STS-1 LINE INTERFACE UNIT
Published Aug 20, 2007
Detailed Description áç AUGUST 2002 XRT73L00A E3/DS3/STS-1 LINE INTERFACE UNIT REV. 2.0.1 GENERAL DESCRIPTION The XRT73L00A DS3/E3/STS-1 Li...
Datasheet PDF File XRT73L00A PDF File

XRT73L00A
XRT73L00A

Overview
áç AUGUST 2002 XRT73L00A E3/DS3/STS-1 LINE INTERFACE UNIT REV.
2.
0.
1 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.
XRT73L00A can be configured to support the E3 (34.
368 Mbps), DS3 (44.
736 Mbps) or the SONET STS-1 (51.
84 Mbps) rates.
In the transmit direction, the XRT73L00A encodes input data to either B3ZS (for DS3/STS-1 applications) or HDB3 (for E3 applications) 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 XRT73L00A 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.
The XRT73L00A also contains a 4-Wire Microprocessor Serial Interface for accessing the on-chip Command registers.
FIGURE 1.
BLOCK DIAGRAM OF THE XRT73L00A E3 S T S -1 /D S 3 H o s t/(H W ) 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 RLO L EXCLK IC T R C L K IN V R T IP R R IN G AGC/ E qualizer S licer C lock R ecovery RCLK1 Invert L C V /(R C L K 2 ) R E Q D IS P eak D etecto r LO S D etector D ata R ecovery H D B 3/ B 3Z S D ecode...


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