HDB3 Encoder/Decoder/Clock Regenerator

The MV1442, along with other devices in the Zarlink 2Mbit PCM signalling series comprise a group of circuits which will perform the common channel signalling and error detection functions for a 2.048Mbit PCM transmission link operating in accordance with the appropriate CCITT recommendations. The circuits are fabricated in CMOS and operate from a single +5V supply with all inputs and outputs being TTL compatible.

Features

• On-chip Digital Clock Regenerator

• HDB3 Encoding and Decoding to CCITT Recommendation G.703

• Asynchronous Operation

• Simultaneous Encoding and Decoding

• Clock Recovery Signal allows Off-chip Clock Regeneration

• Loop Back Control

• HDB3 Error Monitor

• ‘All Ones’ Error Monitor

• Loss of Input Alarm

• Low Power Operation

• 2.048MHz or 1.544MHz Operation in External or Internal Clock Recovery mode

• 8.448MHz Operation in External Clock Recovery mode