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