LUCL9218AAR-DT datasheet(3/30 Pages) AGERE

Part #	LUCL9218AAR-DT

Description	Low-Cost Line Interface

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Manufacturer	AGERE [Agere Systems]

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Agere Systems Inc.

3

Data Sheet

November 2001

L9218A/G Low-Cost Line Interface

Description (continued)

Figure 1. Functional Diagram

–

+

–

+

–

A = 1

A = –1

POWER CONDITIONING AND REFERENCE

PT

PR

RTSN

RTSP

LCTH

RING TRIP DETECTOR

LOOP CLOSURE DETECTOR

BATTERY FEED

STATE CONTROL

B0

RCVP

RCVN

B1

NSTAT

+

–

TIP/RING

CURRENT

SENSE

B2/NC

A VERSION GAIN = 3.93

G VERSION GAIN = 1

FORWARD AND REVERSE BATTERY

DCOUT

VTX

TG

TXI

VITR

–

+

AX

RECTIFIER

3

AAC

β = 9.66

THERMAL

SHUTDOWN

TSD

β = 41 V/A

12-3557 (F).d

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