Lucent Technologies Inc.

5

Data Sheet

August 1999

People’s Republic of China Applications

L8567 SLIC for

12-2551.f (F)

* Relay driver controls routed to L8567 RD1I, RD2I, and RD3I pins when using EMR. If L7583 solid-state switch is used, driver control buses

are routed directly to L7583 control inputs, and SLIC pins RD1I, RD2I, and RD3I are grounded.

Figure 1. Functional Diagram

THERMAL

SHUTDOWN SENSE

+

–

–

+

–

+

+

–

A = 1

A = –1

POWER CONDITIONING & REFERENCE

PT

PR

CURRENT

LIMIT SET

RTSN

RTSP

RING TRIP DETECTOR

VTX

RCVP

RCVN

NLED

RD1O

+

+

–

–

TIP/RING

CURRENT

SENSE

TG

RECTIFIER

PWR

LED

DRIVE

RELAY

DRIVE

RELAY

DRIVE

RELAY

DRIVE

NLC

NRDET

NTSD

NSTAT

LATCHES

LOGIC

DGND

RD2O

RD3O

LOOP CLOSURE

DETECTOR

3

1

RD3I

RD2I

RD1I

B1

B0

EN

TO

L8567

1, 2, 3*

FROM

T7507

CODEC

FROM

L8567

1, 2, 3

TO

T7507

CODEC

NTSD

NSTAT