L8576B 데이터 시트보기 (PDF) - Agere -> LSI Corporation

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L8576B

Dual Ringing SLIC

Agere -> LSI Corporation 

Data Sheet

May 2001

L8576B Dual Ringing SLIC

Features

s Two SLIC channels for multiple tip/ring interfaces

s On-chip balanced ringing generator, no ring relay

required

s Single battery operation or optional automatic bat-

tery switch

s Quiet battery reversal for on-hook signaling

s Disconnect state

s Distortion-free, on-hook transmission

s 24 mA loop current limiter

s Ring trip detector

s Switchhook detector

s Immune to channel crosstalk and impulse noise

s Allows rail overvoltages for ease of protection

s Thermal protection

s 44-pin, surface-mount, plastic package (PLCC)

Applications

s POTS for ISDN

s Terminal adapters (TA)

s Digital loop carrier (DLC) systems

s PABX

Description

The Agere Systems Inc. L8576B electronic dual sub-

scriber line interface circuit (SLIC) provides all the

functions that are necessary to interface a codec to

the tip and ring of a subscriber loop, integrating two

battery feeds and ringing generators in one low-cost

package. The L8576B device is optimized to meet

the needs of short loop, customer premises applica-

tions and features balanced ringing from the single

battery supply. The device is built using a 90 V com-

plementary bipolar (CBIC) process. It is available in a

44-pin PLCC package.

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