Datasheet > AM7922-4SC

AM7922-4SC

更新时间： 2024-10-27 23:29:55

品牌	Logo	应用领域
其他 - ETC		电信
页数	文件大小	规格书
20页	268K
描述
Telecommunication IC

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中文翻译

获取价格

数据手册

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AM7922-4SC 数据手册

Am7922

Subscriber Line Interface Circuit

The Am7922 Subscriber Line Interface Circuit implements the basic telephone line interface functions, and enables

the design of low cost, high performance, POTS line interface cards.

Programmable loop-detect threshold

DISTINCTIVE CHARACTERISTICS

Ground-key detector

Control states: Active, Reverse Polarity, Tip

Open, Ringing, Standby, and Open Circuit

Low standby power (35 mW)

–19 V to –58 V battery operation

On-hook transmission

Programmable ring-trip detect threshold

No –5 V supply required

Current Gain = 500

On-chip Thermal Management (TMG) feature

Two-wire impedance set by single external

impedance

Three on-chip relay drivers and relay snubbers,

1 ringing and 2 general purpose

Available in PLCC and SOIC

Tip Open state for ground-start lines

Programmable constant-current feed

BLOCK DIAGRAM

TMG

Relay

Driver

RYOUT2

Relay

Driver

RYOUT1

Ring Relay

Driver

RINGOUT

A(TIP)

HPA

Input Decoder

and Control

Two-Wire

Interface

HPB

DET

VTX

RSN

Signal

B(RING)

Transmission

Off-Hook

Detector

RDC

CAS

Power-Feed

Controller

Ring-Trip

Detector

VBAT

BGND

VCC VBREF AGND/DGND

Publication# 080252

Rev: A Amendment: /0

Issue Date: October 1999

12 3 4 5 6 7...20

中文翻译

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