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MJ1440 - HDB3 ENCODER/DECODER

General Description

1.

NRZ Data in Input data for encoding into ternary HDB3 form.

NRZ data is clocked'by the negative edge of the Clock (Encoder) .

Key Features

  • 5v ± 5% Supply -50mA Max.
  • HDB3 Encoding and Decoding to CCITT rec. G703.
  • Asynchronous Operation.
  • Simultaneous Encoding and Decoding.
  • Clock Recovery Signal Generated from Incoming HDB3 Data.
  • Loop Back Control.
  • HDB3 Error Monitor.
  • 'All Ones' Error Monitor.
  • Loss of Input Alarm (All Zeros Detector).
  • Decode Data in NRZ Form.

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Datasheet Details

Part number MJ1440
Manufacturer Plessey
File Size 172.46 KB
Description HDB3 ENCODER/DECODER
Datasheet download datasheet MJ1440 Datasheet

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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MJ1440 2 MBIT PCM SIGNALLING CIRCUIT MJ1440 HDB3 ENCODER/DECODER The 2.048 MBit PCM Signalling Circuits comprise a group of circuits which will perform the common signalling and error detection functions for a 2.048 MBit PCM transmission link operating to the appropriate CCITT recommendations. The circuits are fabricated in N-channel metal gate MOS and operate from a single 5 volt supply, relevant inputs and outputs are TTL compatible. The MJ 1440 is an encoder/decoder for the pseudoternary transmission code, HDB3 (CCITT Orange Book Vol 111.2 Annex to Rec. G703). The device encodes and decodes simultaneously and asynchronously. Error monitoring functions are provided to detect violations of HDB3 coding, all ones detection and loss of input (all zeroes detection).