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XRT73LC00A

Exar Corporation
Part Number XRT73LC00A
Manufacturer Exar Corporation
Description E3/DS3/STS-1 LINE INTERFACE UNIT
Published Aug 20, 2007
Detailed Description www.DataSheet4U.com xr AUGUST 2004 PRELIMINARY XRT73LC00A E3/DS3/STS-1 LINE INTERFACE UNIT REV. P1.0.0 GENERAL DESCR...
Datasheet PDF File XRT73LC00A PDF File

XRT73LC00A
XRT73LC00A

Overview
www.
DataSheet4U.
com xr AUGUST 2004 PRELIMINARY XRT73LC00A E3/DS3/STS-1 LINE INTERFACE UNIT REV.
P1.
0.
0 GENERAL DESCRIPTION The XRT73LC00A DS3/E3/STS-1 Line Interface Unit is a low power CMOS version of the XRT73L00A and consists of a line transmitter and receiver integrated on a single chip and is designed for DS3, E3 or SONET STS-1 applications.
XRT73LC00A 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 XRT73LC00A 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 XRT73LC00A 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 XRT73LC00A also contains a 4-Wire Microprocessor Serial Interface for accessing the on-chip Command registers.
FIGURE 1.
BLOCK DIAGRAM OF THE XRT73LC00A E3 STS -1/DS3 Host/(HW ) FEATURES • Incorporates an improved Timing Recovery circuit and is pin and functional compatible to XRT73L00A • 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 • Low Power CMOS Design • 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 RLOL EXCLK ICT RCLKINV RTIP RRING AGC/ Equalizer Slicer Clock Recovery RCLK1 Invert LCV/(RCLK2) Da ta Recovery RE QDIS Peak Detector LOS Dete...


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