Datasheet > MH88422

MH88422

更新时间： 2024-01-10 07:18:47

品牌	Logo	应用领域
MITEL		/
页数	文件大小	规格书
12页	125K
描述
Line Interface Circuit Preliminary Information

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MH88422 数据手册

MH88422

Line Interface Circuit

Preliminary Information

ISSUE 5

April 1995

Features

•

FAX and Modem interface (V29/V22 bis)

Ordering Information

•

Variants match German, UK & 600Ω network

impedances

MH88422-1

MH88422-2

MH88422-3

14 Pin DIL Package

•

Provides reinforced barrier to international PTT

requirements

Surface Mount Options are available by adding the

•

Transformerless 2-4 Wire conversion

Loop start operation

Suffix “S”

Description

Pulse and DTMF operation

Accommodates external monitor phone

Line state detection outputs:

-loop current/ringing outputs

Single +5V operation, low idle power (5mW)

Full Duplex

The Mitel MH88422 Line Interface Circuit provides a

complete audio and signalling link between audio

equipment and central office. The functions provided

by the MH88422 include 2-4 Wire conversion, loop

seizure, ring voltage and loop current detection. The

device is fabricated as thick film hybrid which

incorporates various technologies for optimum circuit

design, high voltage isolation and very high

reliability.

Suitable for power down applications

Applications

Interface to Central Office for:

•

DAA

Variants are provided to meet German (-1) and UK

(-3) line impedance (see section on Line

Impedances), as well as a 600Ω variants (-2).

Modem

FAX

Answering Machine

Terminal Equipment

Isolation Barrier

VDD

Power

Supply

AGND

Opto-

Logic Input

Buffer

Isolation

TIP

Active

Termination

RING

Opto-

Audio

Buffer

Isolation

Audio Input

Buffer

Transhybrid

Loss

Cancellation

Circuit

TXIN

Opto-

Isolation

Audio

Buffer

Input

Buffer

Loop

Ring &

Opto-

RVLC

RLS

Buffer

Isolation

NETWORK CONNECTIONS

USER CONNECTIONS

Figure 1 - Functional Block Diagram

2-21

12 3 4 5 6 7...12

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与MH88422相关器件

型号	品牌	获取价格	描述	数据表
MH88422-1	MITEL	获取价格	Data Access Arrangement Preliminary Information
MH88422-1S	MICROSEMI	获取价格	Telecom IC, Hybrid, PDSO14,
MH88422-2	MITEL	获取价格	Data Access Arrangement Preliminary Information
MH88422-21	ZARLINK	获取价格	Modem-Support Circuit, Hybrid, PDIP23, LEAD FREE, DIL-26
MH88422-2S	ZARLINK	获取价格	Modem-Support Circuit, Hybrid, PDSO14, SMT-14
MH88422-3	MITEL	获取价格	Data Access Arrangement Preliminary Information
MH88422-3S	ZARLINK	获取价格	Modem-Support Circuit, Hybrid, PDSO14, SMT-14
MH88422-3S	MICROSEMI	获取价格	Telecom IC, Hybrid, PDSO14,
MH88422BD-1	MITEL	获取价格	Data Access Arrangement Preliminary Information
MH88434-P	MICROSEMI	获取价格	Modem-Support Circuit, Hybrid, CDIP18,