Datasheet > MH88631-2

MH88631-2

更新时间： 2024-09-22 22:19:35

品牌	Logo	应用领域
MITEL		电信集成电路
页数	文件大小	规格书
10页	90K
描述
Central Office Interface (LS/GS) Preliminary Information

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MH88631-2 数据手册

MH88631

Central Office Interface (LS/GS)

Preliminary Information

ISSUE 4

April 1995

Features

Ordering Information

•

Transformerless 2-4 wire conversion

Line state detection outputs

- forward current

MH88631-1 40 Pin SIL Package

MH88631-2 40 Pin SIL Package

- reverse current

0°C to 70°C

- ring ground

- tip ground

- ringing voltage

Description

Programmable audio transmit and receive gain

Loop start or ground start termination

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.

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

LPGND RINGND

VCC+

VCC- AGND

RG FC

RC1

RD1

RGND

Signal Detection

Circuitry

Ring

Ground

Relay

Driver 1

RD2

RC2

Relay

Driver 2

Network

Balance

NETBAL

GSX

VTR+

VTR-

RXIN-

RXIN+

Audio Section

Circuitry

(2-4 Wire)

Active

Termination

GSR

RXOUT

VEE

VDD

TXIN+ TXIN-

QB QE XA XB XC

Figure 1 - Functional Block Diagram

2-225

12 3 4 5 6 7...10

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