Product Summary

The MH89790B is a Mitel CEPT PCM 30 interface solution, designed to meet the latest CCITT standards PCM 30 format with CRC-4. The MH89790B 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 MH89790B, permitting the removal of the tuneable inductor and inclusion of the external NAND gate used for generating RxD.

Parametrics

MH89790B 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

MH89790B 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

MH89790B block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MH89790B
MH89790B
Other

Data Sheet
Negotiable 
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MH89101
MH89101
Other

Data Sheet
Negotiable 
MH89625C
MH89625C
Other

Data Sheet
Negotiable 
MH89760B
MH89760B
Other

Data Sheet
Negotiable 
MH89761
MH89761
Other

Data Sheet
Negotiable 
MH89770
MH89770
Other

Data Sheet
Negotiable 
MH89790B
MH89790B
Other

Data Sheet
Negotiable