STLC5445 datasheet(1/23 Pages) STMICROELECTRONICS

Part #	STLC5445

Description	QUAD LINE FEED CONTROLLER

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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STLC5445

October 2002

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BATTERY VOLTAGE UP TO 120V

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SUPPLIES POWER FOR UP TO FOUR

DIGITAL TELEPHONE LINES

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PROGRAMMABLE CURRENT LIMITING

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LONGITUDINAL CURRENT CANCELLATION

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ETSI ETR80 COMPLIANT

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OUTPUT CURRENT UP TO 140 mA

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STATUS CONDITION DETECTION FOR

EACH LINE

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AUTOMATIC THERMAL PROTECTION

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AUTO POWER ON SEQUENCE

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OUTPUT STAGE OPTIMIZED FOR MINIMAL

OUTPUT OVERVOLTAGE PROTECTION

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TWO EXTERNAL RELAY DRIVERS PER LINE

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PARALLEL OR MPI CONTROL INTERFACE

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HI-QUAD PACKAGE 64 PIN

DESCRIPTION

The QUAD LINE FEED CONTROLLER provides a

power source for up to four U line interfaces. The

power source to the device is a local battery or a cen-

tralized regulated power supply. Each powered line is

individually controlled and monitored by the device

interface.

A MPI or a simple parallel interface can be selected

by a pin strap.

Each line can be individually powered and monitored:

therefore overload and faults can easily be detected

and localized even in a large system. The status con-

ditions detected by the device are: Current Overload,

Thermal Overload, Open Loop. If activated (by

means of a dedicated pin strap), a self generated

power on sequence avoids the thermal over stress

when a simultaneous power on has been requested

for more than one channel. The current limiting value

can globally be programmed for the four channels by

means of an external resistor. The device has two in-

tegrated relay drivers per line to drive the test relays

of the ISDN system.

HiQUAD-64

ORDERING NUMBER: STLC5445

QUAD LINE FEED CONTROLLER

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