L3037

SUBSCRIBER LINE INTERFACE CIRCUIT

MONOCHIP SILICON SLIC SUITABLE FOR

PUBLIC/PRIVATE APPLICATIONS

IMPLEMENTS ALL KEY FEATURES OF THE

BORSCHT FUNCTION

SOFT BATTERY REVERSAL WITH PRO-

GRAMMABLE TRANSITION TIME (3 to 100ms)

METERING PULSE INJECTION AND FILTER-

ING WITH MINIMAL COMPONENTS COUNT

(NO TRIMMING REQUIRED).

PROTECTION RESISTOR MISMATCH COM-

PENSATION

ON HOOK TRANSMISSION

LOOP START/GROUND START FEATURE

IND TEMP. RANGE:

-40

°C TO +85°C

LOW POWER DISSIPATION IN ALL OPER-

ATING MODES

INTEGRATED

ZERO

CROSSING

RELAY

DRIVER

INTEGRATED (NOISE-LESS) RING TRIP DE-

TECTION

VERY LOW NO. of STD TOLERANCE EX-

TERNAL COMPONENTS

SELECT PART FOR U.S. APPLICATIONS

(63dB TYP. LONG. BALANCE)

SURFACE MOUNT PACKAGE (PLCC44 or

PQFP44)

INTEGRATED THERMAL PROTECTION

PIN TO PIN COMPATIBLE WITH L3035/36

DESCRIPTION

The L3037 subscriber line interface circuit is a bi-

polar device in 70V technology developed for cen-

tral office / loop carrier and private applications.

The L3037 is pin to pin and function compatible

with L3035/36. One particular pin (reserved in

L3035/36) is now used for reverse polarity transi-

tion time programming. The line polarity transition

is not affecting the AC signal transmission that

can continue also during the line voltage transi-

tion.L3037 is available in two different package

options: PLCC44 and PQFP44 (10 x 10mm).

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

December 1997

BLOCK DIAGRAM

PLCC44

PQFP44(10 x 10)

ORDERING NUMBERS:

L3037FN

L3037QN

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