com PRELIMINARY XRT73R12 REV.
P1.
0.
3 TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT OCTOBER 2003 GENERAL DESCRIPTION The XRT73R12 is a twelve channel fully integrated Line Interface Unit (LIU) featuring EXAR’s R3 Technology (Reconfigurable, Relayless Redundancy) for E3/DS3/STS-1 applications.
The LIU incorporates 12 independent Receivers and Transmitters in a single 420 Lead TBGA package.
Each channel of the XRT73R12 can be independently configured to operate in E3 (34.
368 MHz), DS3 (44.
736 MHz) or STS-1 (51.
84 MHz).
Each transmitter can be turned off and tri-stated for redundancy support or for conserving power.
The XRT73R12’s differential receiver provides high noise i...

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