Datasheet > AM7949-3JC

AM7949-3JC

更新时间： 2024-10-27 23:29:59

品牌	Logo	应用领域
其他 - ETC		电信
页数	文件大小	规格书
20页	309K
描述
Telecommunication IC

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中文翻译

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数据手册

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AM7949-3JC 数据手册

Am7949

Subscriber Line Interface Circuit

DISTINCTIVE CHARACTERISTICS

n Ideal for Fiber-In-The-Loop (FITL) applications

n Low standby power

n Programmable constant-current feed

n Current gain = 200

n –21 V to –58 V battery operation

n On-chip battery switching and feed selection

n On-hook transmission

n Programmable loop-detect threshold

n Ground-key detector

n Tip Open state for ground-start lines

n Polarity reversal option

n Two-wire impedance set by single external

impedance

n On-chip ring relay driver and relay

snubber circuit

BLOCK DIAGRAM

Ring Relay

Driver

RINGOUT

A(TIP)

HPA

Input Decoder

and Control

Ground-Key

Detector

Two-Wire

Interface

DET

HPB

VTX

RSN

Signal

Transmission

Off-Hook

Detector

B(RING)

Power-Feed

Controller

RDC

CAS

Ring-Trip

Detector

TESTIN

VBAT2

Test Relay

Driver

TESTOUT

BSW

Switch

Driver

VBAT1

VCC

VEE

AGND/DGND

BGND

B2EN

Publication# 080143 Rev: D Amendment: /0

Issue Date: October 1999

12 3 4 5 6 7...20

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