MH89790B Datasheet | Mitel Networks

Features - - - - - - - - - - - - - - - plete primary rate 2048 kbit/s CEPT transceiver with CRC-4 option Selectable HDB3 or AMI line code Two frame elastic buffer with 32µ s jitter buffer Tx and Rx frame and multiframe synchroniza-tion signals Frame alignment and CRC error counters Insertion and detection of A, B, C, D signalling bits with optional debounce Line driver and receiver Per channel, overall, and remote loop around Digital phase detector between E1 line and ST-BUS ST-BUS patible Pin patible with the MH89790 Inductorless clock recovery Loss of Signal (LOS) indication Available in standard, narrow and surface mount formats Supports single supply rail operation MH89790B MH89790BN MH89790BS ISSUE 5 May 1995 Ordering Information 40 Pin DIL Hybrid 1.3” row pitch 40 Pin DIL Hybrid 0.8“ row pitch 40 Pin Surface Mount Hybrid 0°C to 70°C Description The MH89790B is Mitel’s CEPT PCM 30 interface solution, designed to meet the latest CCITT standards PCM 30 format with CRC-4. The MH89790B provides a plete interface between a 2.048 Mbit/sec digital trunk and Mitel’s Serial Tele Bus, the ST-BUS. The MH89790B is a pin-patible enhancement of the MH89790, permitting the removal of the tuneable inductor and inclusion of the external NAND gate used for generating Rx D. Applications - - - Primary rate ISDN network nodes Multiplexing equipment Private network: PBX to PBX links Tx MF C2i F0i Rx MF DSTo DSTi CSTi0 CSTi1 CSTo ST-BUS Timing Cicuitry Digital Attenuator ROM 2 Frame Elastic Buffer with Slip Control PADi Tx G PADo CEPT Link Interface Transmitter OUTA OUTB Rx A Rx T Receiver LOS Rx R Rx B Data Interface - - Serial Control Interface ABCD Signalling RAM Control Logic Phase Detector - Clock Extractor CEPT Counter - E2o VDD ADl XCtl XSt - E8Ko VSS Figure 1 - Functional Block Diagram 4-187 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 NC NC LOS NC NC NC NC VSS NC DSTo NC OUTB NC Rx MF Tx MF OUTA PADo Tx G PADi VSS Preliminary...