XRT73LC03A

3-Channel DS3/E3/STS-1 Line Interface Unit
Data Sheets OBS (Obsolete)

Overview

# of Channels 3
Data Rate(s) DS3, E3, STS-1
Clk Rec Yes
SH/LH n/a
Temperature Range (°C) Ind.
Op Pwr Sup/Max Cur 3V
Package TQFP-120
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The XRT73LC03A, 3-Channel, DS3/E3/STS-1 Line Interface Unit is a low power CMOS version of the XRT73L03A 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 XRT73LC03A 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 XRT73LC03A 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.

  • Incorporates an improved Timing Recovery circuit and is pin and functional compatible to XRT73L03A
  • 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 120 pin TQFP package
  • Pb-Free, RoHS Compliant Versions Offered

  • Digital Cross Connect Systems
  • CSU/DSU Equipment
  • Routers
  • Fiber Optic Terminals
  • Multiplexers
  • ATM Switches

Documentation & Design Tools

Type Title Version Date File Size
Data Sheets XRT73LC03A 3 Channel DS3/E3/STS-1 Line Interface Unit 1.0.4 October 2012 342.5 KB
Application Notes TAN-200, MaxLinear APIs - OS Portability 1.0.0 August 2007 88.5 KB
Application Notes TAN-075, DS-3/E3 LIU Layout Recommendations 1.0.0 February 2007 29.8 KB
Application Notes TAN-025, Interfacing the Microprocessor Serial Interface of the XRT730X Family of DS3/E3/STS-1 LIU Devices to the SPI Port of the MC68360 QUICC Device 1.3 July 2004 16 KB
Schematics & Design Files Schematic 1.0.0 January 2004 120.8 KB
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Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Suggested Replacement PDN
XRT73LC03AIV OBS XRT73LC03AIV-F
XRT73LC03AIV-F -40 85 OBS XRT75L04IV-F
XRT73LC03AIVTR-F TQFP120 -40 85 OBS XRT73LC03AIV-F
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Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.

Notifications

Distribution Date Description File
02/01/2019 Product Discontinuation Notice
07/12/2017 Product Discontinuation Notice
12/05/2013 Addition of an alternate qualified assembly site, ASE Chung-Li (Taiwan) for assembly using copper or gold wire bonding. Material change and alternate assembly site.
03/19/2013 Product Discontinuation Notification Discontinued.

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The -F suffix indicates ROHS / Green compliance:
https://www.exar.com/quality-assurance-and-reliability/lead-free-program