MT8981DL datasheet(1/14 Pages) MITEL

Part #	MT8981DL

Description	ISO-CMOS ST-BUS??FAMILY Digital Switch

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Manufacturer	MITEL [Mitel Networks Corporation]

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®

Features

•

Mitel ST-BUS compatible

•

4-line x 32-channel inputs

•

4-line x 32-channel outputs

•

128 ports non-blocking switch

•

Single power supply (+5 V)

•

Low power consumption: 30 mW Typ.

•

Microprocessor-control interface

•

Three-state serial outputs

Description

This

VLSI

ISO-CMOS

device

is

designed

for

switching PCM-encoded voice or

data, under

microprocessor

control,

in

a

modern

digital

exchange,

PBX

or

Central

Office.

It

provides

simultaneous connections for up to 128 64 kbit/s

channels. Each of the four serial inputs and outputs

consist of 32 64 kbit/s channels multiplexed to form a

2048 kbit/s ST-BUS stream. In addition, the MT8981

provides microprocessor read and write access to

individual ST-BUS channels.

Figure 1 - Functional Block Diagram

STo0

STo1

STo2

STo3

Serial

to

Parallel

Converter

Data

Memory

Frame

Counter

Control Register

Control Interface

Output

MUX

Connection

Memory

Parallel

to

Serial

Converter

CS R/W A5/

A0

DTA D7/

D0

C4i

F0i

VDD

VSS

ODE

STi0

STi1

STi2

STi3

DS

ISSUE 6

May 1995

MT8981D

Digital Switch

ISO-CMOS ST-BUS

™ FAMILY

Ordering Information

MT8981DC

40 Pin Ceramic DIP

MT8981DE

40 Pin Plastic DIP

MT8981DP

44 PLCC

MT8981DL

44 Pin QFP

-40°C to +85°C

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MT8981DL Datasheet(PDF) 1 Page - Mitel Networks Corporation

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