L3037 Datasheet, PDF (1/22 Pages) STMicroelectronics – SUBSCRIBER LINE INTERFACE CIRCUIT

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
BLOCK DIAGRAM
PLCC44
PQFP44(10 x 10)
ORDERING NUMBERS:
L3037FN
L3037QN
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).
December 1997
1/22
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.