Datasheet > AM7946-2JC

AM7946-2JC

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	266K
描述
Telecommunication IC

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中文翻译

获取价格

数据手册

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AM7946-2JC 数据手册

Am7946

Subscriber Line Interface Circuit

DISTINCTIVE CHARACTERISTICS

Ideal for long loop applications

On-hook transmission

Two-wire impedance set by scaled external

impedance

Programmable constant-current feed

Programmable loop-detect threshold

Current gain = 500

–40 V to –58 V battery operation

On-hook transmission

Internal V_EEregulator

Ground-key detector

Low standby power

Tip Open state for ground-start lines

Polarity reversal option available

On-chip Thermal Management (TMG) feature

Scaled line voltage (VAB) output

Three on-chip relay drivers and snubber circuits

(32-PLCC only)

Logic selectable for 2.2 V metering or long

loop feed

BLOCK DIAGRAM

TMG

Relay

RINGOUT

Driver

Ring Relay

RYOUT2

Driver

A(TIP)

HPA

RYE

Ring-Trip

Detector

Input Decoder

and Control

Two-Wire

Interface

Ground-Key

Detector

HPB

Off-hook

Detector

DET

B(RING)

VTX

RSN

Signal

Transmission

RSG

RDC

CAS

VDC

OVH

Power-Feed

Controller

VBAT

BGND

VCC VNEG AGND/DGND

Publication# 080154 Rev: D Amendment: /0

Issue Date: October 1999

12 3 4 5 6 7...20

中文翻译

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