Datasheet > AM7926-2VC

AM7926-2VC

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	383K
描述
Telecommunication IC

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中文翻译

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数据手册

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AM7926-2VC 数据手册

Am7926

Subscriber Line Interface Circuit

The Am7926 Subscriber Line Interface Circuit implements the basic telephone line interface functions, and enables

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

Programmable constant-current feed

DISTINCTIVE CHARACTERISTICS

Low Overhead Voltage (6 V)

Ideal for high-density, low-power linecard

applications

Programmable loop-detect threshold

Ground-start detector

Control states: Active, Reverse Polarity, Tip

Open, Ringing, Standby, and Open Circuit

Programmable ring-trip detect threshold

No –5 V supply required

Low standby power (45 mW)

–16 V to –58 V battery operation

On-hook transmission

Current Gain = 500

Three on-chip relay drivers and relay snubbers,

one ringing and two general purpose

Two-wire impedance set by single external

impedance

Tip Open state for ground-start lines

BLOCK DIAGRAM

Relay

RYOUT2

Driver

Relay

Driver

RYOUT1

Relay

RINGOUT

Driver

A(TIP)

HPA

Input Decoder

and Control

Two-Wire

Interface

HPB

DET

VTX

Signal

Transmission

RSN

B(RING)

Off-Hook

Detector

VBAT2

Power-Feed

Controller

RDC

CAS

VDC

Ring-Trip

Detector

VBAT1

BGND

VCC

VBREF

AGND

Publication# 080449

Rev: A3 Amendment: /0

Issue Date: January 2001

12 3 4 5 6 7...20

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