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STLC5445 Datasheet

  • STLC5445

  • QUAD LINE FEED CONTROLLER

  • 23頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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STLC5445
QUAD LINE FEED CONTROLLER
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BATTERY VOLTAGE UP TO 120V
SUPPLIES POWER FOR UP TO FOUR
DIGITAL TELEPHONE LINES
PROGRAMMABLE CURRENT LIMITING
LONGITUDINAL CURRENT CANCELLATION
ETSI ETR80 COMPLIANT
OUTPUT CURRENT UP TO 140 mA
STATUS CONDITION DETECTION FOR
EACH LINE
AUTOMATIC THERMAL PROTECTION
AUTO POWER ON SEQUENCE
OUTPUT STAGE OPTIMIZED FOR MINIMAL
OUTPUT OVERVOLTAGE PROTECTION
TWO EXTERNAL RELAY DRIVERS PER LINE
PARALLEL OR MPI CONTROL INTERFACE
HI-QUAD PACKAGE 64 PIN
HiQUAD-64
ORDERING NUMBER: STLC5445
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.
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
October 2002
1/23

STLC5445 產(chǎn)品屬性

  • STMicroelectronics

  • 監(jiān)控電路

  • SMD/SMT

  • HiQUAD-64

  • Tray

  • 84

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