MT8976AP Datasheet

IC型號：
MT8976AP
PDF描述：
ISO-CMOS ST-BUS⑩ FAMILY T1/ESF Framer Circuit
文件大?。?/label>
340.07KB
PDF頁數(shù)：
26頁
芯片廠家：
MITEL

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ISO-CMOS ST-BUS鈩?FAMILY

MT8976

T1/ESF Framer Circuit

Features

鈥?/div>

D3/D4 or ESF framing and SLC-96 compatible

2 frame elastic buffer with 32

碌sec

jitter buffer

Insertion and detection of A, B,C,D bits.

Signalling freeze, optional debounce

Selectable B8ZS, jammed bit (ZCS) or no zero

code suppression

Yellow alarm and blue alarm signal capabilities

Bipolar violation count, F

error count, CRC

error count

Selectable robbed bit signalling

Frame and superframe sync. signals, Tx and Rx

AMI encoding and decoding

Per channel, overall, and remote loop around

Digital phase detector between T1 line & ST-

BUS

One uncommitted scan point and drive point

Pin compatible with MT8977 and MT8979

ST-BUS compatible

ISSUE 9

May 1995

Ordering Information

MT8976AC

28 Pin Ceramic DIP

MT8976AE

28 Pin Plastic DIP

MT8976AP

44 Pin PLCC

-40擄C to 85擄C

Description

The MT8976 is Mitel鈥檚 second generation T1

interface solution. The MT8976 meets the Extended

Super Frame format (ESF), the current D3/D4 format

and is compatible with SLC-96 systems.

The MT8976 interfaces to DS1 1.544 Mbit/sec digital

trunk.

Applications

鈥?/div>

DS1/ESF digital trunk interfaces

Computer to PBX interfaces (DMI and CPI)

High speed computer to computer data links

C1.5i

ST-BUS

Timing

Circuitry

2 Frame

Elastic Buffer

with Slip

Control

DS1

Link

Interface

2048-1544

Converter

CSTi0

CSTi1

CSTo

Serial

Control

Interface

ABCD

Signalling RAM

XCtl

XSt

Control Logic

E1.5i

Phase

Detector

DS1

Counter

RxFDLClk

RxFDL

RxA

Remote &

Digital

Loopbacks

RxB

TxA

TxB

TxFDLClk

TxFDL

RxD

TxSF

C2i

F0i

RxSF

DSTo

DSTi

Data

Interface

鈥?/div>

E8Ko

Figure 1 - Functional Block Diagram

4-29

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