MJ1440 Datasheet (Plessey) - HDB3 ENCODER/DECODER

MJ1440, HDB3 ENCODER/DECODER

Functions Listed by pin number 1.

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

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

Clock (Encoder) Clock for encoding data on pin 1 3.

Loss of input alarm This output goes to logic' l' if eleven consecutive zeroes ar

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 tr

MJ1440 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