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DS21Q50 - Quad E1 Transceiver

General Description

The DS21Q50 E1 quad transceiver contains all the necessary functions for connecting to four E1 lines.

The on-board clock/data recovery circuitry coverts the AMI/HDB3 E1 waveforms to an NRZ serial stream.

Key Features

  • Four Complete E1 (CEPT) PCM-30/ISDN-PRI Transceivers Long-Haul and Short-Haul Line Interfaces 32-Bit or 128-Bit Crystal-Less Jitter Attenuator Frames to FAS, CAS, CCS, and CRC4 Formats 4MHz/8MHz/16MHz Clock Synthesizer Flexible System Clock with Automatic Source Switching on Loss-of-Clock Source Two-Frame Elastic-Store Slip Buffer on the Receive Side Interleaving PCM Bus Operation Up to 16.384MHz Configurab.

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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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DS21Q50 Quad E1 Transceiver www.maxim-ic.com GENERAL DESCRIPTION The DS21Q50 E1 quad transceiver contains all the necessary functions for connecting to four E1 lines. The on-board clock/data recovery circuitry coverts the AMI/HDB3 E1 waveforms to an NRZ serial stream. The DS21Q50 automatically adjusts to E1 22AWG (0.6mm) twisted-pair cables from 0km to over 2km in length. The device can generate the necessary G.703 waveshapes for both 75W coax and 120W twisted-pair cables. The on-board jitter attenuators (selectable to either 32 bits or 128 bits) can be placed in either the transmit or receive data paths. The framers locate the frame and multiframe boundaries and monitor the data streams for alarms.