Datasheet > AM7947CJC

AM7947CJC

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
21页	488K
描述
Telecommunication IC

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中文翻译

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数据手册

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AM7947CJC 数据手册

Am7947C

Subscriber Line Interface Circuit

DISTINCTIVE CHARACTERISTICS

Ideal for China National applications

Low standby power

Programmable constant-current feed

Programmable loop-detect threshold

Current gain = 200

–39.8 V to –58 V battery operation

On-hook transmission

Polarity reversal option

Tip Open state for ground-start lines

On-chip Thermal Management (TMG) feature

Two-wire impedance set by single external

impedance

On-chip ring and test relay driver and relay

snubber circuits

BLOCK DIAGRAM

TMG

Test Relay

TESTOUT

RINGOUT

Driver

Ring Relay

Driver

A(TIP)

HPA

Input Decoder

and Control

Two-Wire

Interface

DET

HPB

VTX

RSN

Signal

Transmission

Off-Hook

Detector

B(RING)

Power-Feed

Controller

RDC

CAS

Ring-Trip

Detector

VBAT

BGND

VCC

VEE AGND/DGND

Publication# 080366

Issue Date: May 2001

Rev: B

12 3 4 5 6 7...21

中文翻译

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