Datasheet > AM79231JC

AM79231JC

更新时间： 2024-10-27 21:54:59

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
28页	278K
描述
Intelligent Subscriber Line Interface Circuit (ISLIC)

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数据手册

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AM79231JC 数据手册

Intelligent Accessä Voice Solutions

Am79231

Intelligent Subscriber Line Interface Circuit (ISLIC™)

DISTINCTIVE CHARACTERISTICS

Monitor of two-wire interface voltages and

currents supports

+5 V and battery supplies

Dual battery operation for system power saving

— Automatic battery switching

— Voice transmission

— Programmable DC feed characteristics

— Independent of battery

— Current limited

— Intelligent thermal management

Compatible with inexpensive protection

networks

— Selectable off-hook and ground-key thresholds

— Subscriber line diagnostics

— Leakage resistance

— Accommodates low tolerance fuse resistors or

PTC thermistors

Metering capable

— Loop resistance

— 12 kHz and 16 kHz

— Line capacitance

— Smooth polarity reversal

— Bell capacitance

Tip-open state supports ground start signaling

Ring relay driver for external ringing

Integrated test load switches/relay drivers

— Foreign voltage sensing

— Power cross and fault detection

BLOCK DIAGRAM

RSN

Signal

Transmission

VTX

HPA

HPB

Two-Wire

Interface

Longitudinal

Control

VLB

Gain/Level Shift

Attenuator

VSAB

VREF

IMT

Signal

TMN

TMP

TMS

Thermal

Management

Control

Conditioning

ILG

CREF

Fault

Meas.

VBL

Switch

Driver

VBH

Relay Control

Relay

Drivers

Input Decoder and

Control Registers

RYE

Relay

Driver 1

VCC

BGND

GND

Pub. # 080248 Rev: C Amendment: /0

Issue Date: December 1999

12 3 4 5 6 7...28

中文翻译

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