Datasheet > AM7942-1JC

AM7942-1JC

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	244K
描述
Telecommunication IC

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中文翻译

获取价格

数据手册

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AM7942-1JC 数据手册

Am7942

Subscriber Line Interface Circuit

DISTINCTIVE CHARACTERISTICS

Programmable constant-current feed

Receive current gain = 200

Programmable loop-detect threshold

Low standby power

Tip Open state for ground-start lines

–19 V to –58 V battery operation

Ideal for PBX and KTS applications

On-chip switching regulator for low-power

dissipation

Performs polarity reversal

Ground-key detector

Can be used with or without the on-chip

switching regulator

Pin for external ground-key noise filter

capacitor

Two-wire impedance set by single external

impedance

Test relay driver option

On-hook transmission

BLOCK DIAGRAM

TESTOUT

Test Relay Driver

Ring Relay Driver

RINGOUT

A(TIP)

Ground-Key

Detector

Input Decoder

and Control

HPA

HPB

DET

Two-Wire

Interface

GKFIL

RSN

Signal

Transmission

VTX

Off-Hook

Detector

B(RING)

RDC

CAS

Power-Feed

Controller

Ring-Trip

Detector

VREG

Switching

Regulator

VBAT

BGND

VCC

VEE

AGND/DGND

CHS

CHCLK

QBAT

15474A-001

Publication# 080127 Rev: F Amendment: /0

Issue Date: October 1999

12 3 4 5 6 7...20

中文翻译

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