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XRT81L27 - SEVEN CHANNEL E1 LINE INTERFACE UNIT

Description

The XRT81L27 is an optimized seven-channel, analog, 3.3V, line interface unit, fabricated using low power CMOS technology.

The device contains seven independent E1 channels, including data and clock recovery circuits.

Features

  • Seven (7) Independent E1 (CEPT) Line Interface Units (Transmitter, Receiver, and Recovery).
  • Transmit Output Pulses that are Compliant with the ITU-T G.703 Pulse Template Requirement for 2.048Mbps (E1) Rates.
  • On-Chip Pulse Shaping for both 75Ω and 120Ω line drivers.
  • Receiver Can Either Be Transformer or CapacitiveCoupled to the Line.
  • Detects and Clears LOS (Loss of Signal) Per ITU-T G.775 and ETS 300 233 (programmable from Host).
  • Compliant wi.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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áç XRT81L27 NOVEMBER 2001 SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY REV. 1.1.0 GENERAL DESCRIPTION The XRT81L27 is an optimized seven-channel, analog, 3.3V, line interface unit, fabricated using low power CMOS technology. The device contains seven independent E1 channels, including data and clock recovery circuits. It is primarily targeted towards the SDH multiplexers that accommodate TU12 Tributary Unit Frames. Line cards in these units multiplex 21 E1 channels into higher SDH rates. Devices with seven E1 interfaces such as the XRT81L27 provide the most efficient method of implementing 21-channel line cards. Each channel performs the driver and receiver functions necessary to convert bipolar signals to logical levels and vice versa.
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