MV1442

Obsolescence Notice This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/ MV1442 HDB3 Encoder/Decoder/Clock Regenerator DS3077 ISSUE 4.0 July 2001 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. The MV1442 is an encoder/decoder for the HDB3 pseudoternary transmission code, described in Annex A of CCITT Recommendation G.703. The device encodes and decodes simultaneously and asynchronously. Error monitoring functions are provided to detect violations of the HDB3 coding, all ones detection and loss of input (all zeros detection) In addition a loop back function is provided for terminal testing. The MV1442 may be selected to function in either internal or external clock recovery modes. Internal clock recovery mode may be selected tor either 1.544MHz or 2.048MHz operation and in this mode an external 16.384MHz crystal (12.352MHz for 1.544MHz operation) is required. External clock recovery mode may be selected for 1.544MHz, 2.048MHz or 8.448MHz ...