MH88631-2 Ver la hoja de datos (PDF) - Mitel Networks

Número de pieza

componentes Descripción

Fabricante

MH88631-2

Central Office Interface (LS/GS)

Mitel Networks 

MH88631

®

Central Office Interface (LS/GS)

Preliminary Information

Features

• Transformerless 2-4 wire conversion

• Line state detection outputs

• - forward current

• - reverse current

• - ring ground

• - tip ground

• - ringing voltage

• Programmable audio transmit and receive gain

• Loop start or ground start termination

• Selectable 600Ω or AT&T compromise balance

network

• -1 version: 20Hz Ringing Voltage

• -2 version: 50Hz Ringing Voltage

Applications

• PBX

• Channel bank

• Intercom

• Key System

ISSUE 4

April 1995

Ordering Information

MH88631-1 40 Pin SIL Package

MH88631-2 40 Pin SIL Package

0°C to 70°C

Description

The Mitel MH88631-1, 2 Central Office Trunk

Interface circuit provides a complete audio and

signalling link between audio switching equipment

and a central office. The loop seize circuitry is

controlled by an external input to provide either a

loop start of ground start termination. The device is

fabricated using thick film ceramic technology to

achieve high density circuit design.

RG FC RV RC TG

LPGND RINGND

VCC+ VCC- AGND

T

Signal Detection

R

Circuitry

VTR+

VTR-

RXIN-

RXIN+

Active

Termination

Ring

Ground

Network

Balance

Relay

Driver 1

Relay

Driver 2

Audio Section

Circuitry

(2-4 Wire)

QB QE XA XB XC

VDD VEE

RXOUT TXIN+ TXIN-

Figure 1 - Functional Block Diagram

RC1

RD1

RGND

CD

RD2

RC2

NETBAL

GSX

VX

VR

GSR

2-225

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