Product Summary

The MH89790BN is a Mitel CEPT PCM 30 interface solution, designed to meet the latest CCITT standards PCM 30 format with CRC-4. The MH89790BN provides a complete interface between a 2.048 Mbit/sec digital trunk and Mitel Serial Telecom Bus, the ST-BUS. The MH89790B is a pin-compatible enhancement of the MH89790BN, permitting the removal of the tuneable inductor and inclusion of the external NAND gate used for generating RxD.

Parametrics

MH89790BN absolute maximum ratings: (1)Supply Voltage with respect to VSS VDD: -0.3~7 V; (2)Voltage on any pin other than supplies: VSS-0.3 VDD+0.3 V; (3)Current at any pin other than supplies: 40 mA; (4)Storage Temperature TST: -40~85 ℃; (5)Package Power Dissipation P: 800 mW.

Features

MH89790BN features: (1)Complete primary rate 2048 kbit/s CEPT transceiver with CRC-4 option; (2)Selectable HDB3 or AMI line code; (3)Two frame elastic buffer with 32ms jitter buffer; (4)Tx and Rx frame and multiframe synchroniza-tion signals; (5)Frame alignment and CRC error counters; (6)Insertion and detection of A, B, C, D signalling bits with optional debounce; (7)Line driver and receiver; (8)Per channel, overall, and remote loop around; (9)Digital phase detector between E1 line and ST-BUS; (10)ST-BUS compatible; (11)Pin compatible with the MH89790; (12)Inductorless clock recovery; (13)Loss of Signal (LOS) indication; (14)Available in standard, narrow and surface mount formats; (15)Supports single supply rail operation.

Diagrams

MH89791
MH89791
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MH89792
MH89792
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MH89793
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MH89790B
MH89790B
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MH89770
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MH89761
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