DS21354L+

3.3V/5V E1 Single-Chip Transceivers

电信接口IC 3.3/5V E1 Single Chip Transceiver

DS21354L+ GENERAL DESCRIPTION

The DS21354L+ DS21354/DS213554 single-chip transceivers (SCTs) contain all the necessary functions to connect to E1 lines. The devices are upward-compatible versions of the DS2153 and DS2154 SCTs. The on-board clock/data recovery circuitry coverts the AMI/HDB3 E1 waveforms to an NRZ serial stream.

DS21354L+ FEATURES

Complete E1 (CEPT) PCM-30/ISDN-PRI

Transceiver Functionality

On-Board Long- and Short-Haul Line Interface

for Clock/Data Recovery and Waveshaping

32-Bit or 128-Bit Crystal-Less Jitter Attenuator

Frames to FAS, CAS, CCS, and CRC4 Formats

Integral HDLC Controller with 64-Byte Buffers

Configurable for Sa Bits, DS0, or Sub-DS0

Operation

Dual Two-Frame Elastic Store Slip Buffers that

can Connect to Asynchronous Backplanes up to

8.192MHz

Interleaving PCM Bus Operation

8-Bit Parallel Control Port that can be used

Directly on Either Multiplexed or

Nonmultiplexed Buses (Intel or Motorola)

Extracts and Inserts CAS Signaling

Detects and Generates Remote and AIS Alarms

Programmable Output Clocks for Fractional E1,

H0, and H12 Applications

Fully Independent Transmit and Receive

Functionality

Full Access to Si and Sa Bits Aligned with

CRC-4 Multiframe

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