Datasheet > AM7953X-2DC

AM7953X-2DC

更新时间： 2024-10-27 22:17:19

品牌	Logo	应用领域
超微 - AMD		/
页数	文件大小	规格书
20页	255K
描述
Subscriber Line Interface Circuit

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中文翻译

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数据手册

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AM7953X-2DC 数据手册

Am79534/Am79535

Subscriber Line Interface Circuit

DISTINCTIVE CHARACTERISTICS

■ Programmable constant-current feed

■ Ground-key detect

■ Line-feed characteristics independent of

■ Two-wire impedance set by single external

battery variations

impedance

■ Programmable loop-detect threshold

■ Polarity reversal feature

■ On-chip switching regulator for low-power

■ Tip Open state for ground-start lines

■ Test relay driver optional

■ On-hook transmission

dissipation

■ Pin for external ground-key noise-filter

capacitor available

BLOCK DIAGRAM

Ring Relay Driver

Test Relay Driver

RINGOUT

TESTOUT

A(TIP)

Ground-Key

Detector

HPA

Input Decoder

and Control

Two-Wire

Interface

DET

HPB

GKFIL

VTX

Signal Transmission

RSN

Off-Hook Detector

Ring-Trip Detector

RDC

Power-Feed

Controller

B(RING)

VREG

VBAT

BGND

Switching Regulator

16854C-01

CHS

QBAT

CHCLK

VCC

VEE

AGND

Notes:

1. Am79534—E0 and E1 inputs; ring and test relay drivers sourced internally to BGND.

2. Am79535—E0 and E1 inputs; ring relay driver sourced internally to BGND; ground-key filter pin.

3. Current gain (K₁) = 1000 for all parts.

Publication# 16854 Rev: D Amendment: /0

Issue Date: October 1999

12 3 4 5 6 7...20

中文翻译

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