Details, datasheet, quote on part number: STLC5445
PartSTLC5445
CategoryCommunication => ISDN
DescriptionQuad Line Feed Controller
CompanyST Microelectronics, Inc.
DatasheetDownload STLC5445 datasheet
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Features, Applications

BATTERY VOLTAGE TO 120V SUPPLIES POWER FOR UP TO FOUR DIGITAL TELEPHONE LINES PROGRAMMABLE CURRENT LIMITING LONGITUDINAL CURRENT CANCELLATION ETSI ETR80 COMPLIANT OUTPUT CURRENT 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

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 conditions 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 integrated 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 centralized 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

Limiting current reference Reference & biasing generation Voltage and current biasing
PSC PBIT CKILC RESETN INTN ALE (A0) ES1 (CSN) ES2 (RDN) ES3 (WRN) NACK3 (D3)

Relay driver 3B Relay driver 3A Relay driver 2B Relay driver 2A Relay driver 1B Relay driver 1A Relay driver 0B Relay driver 0A

/ O connections on channels 1, 2 and 3 are similar to those reasons. shown for channel 0 but have been omitted for clarity

N° Pin Name CODC0 CODC1 CKILC REL0B REL1A Description Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on channel 0. Pin for connection of the external capacitor (100nF/6.3V) to GND for COD signal filtering on channel 1 External clock input pin for the internal power on sequencer Logic pin: with PSC = 0, Line 0 status information output with PSC = 1, Line 0 I/O tristate data bus Logic pin: with PSC = 0, Line 1 status information output with PSC = 1, Line 1 I/O tristate data bus Output of the 0A relay driver Logic input pin: relay 0A output driver's ON/OFF (high = ON) Logic input pin: relay 0B output driver's ON/OFF (high = ON) Output of the 0B relay driver Output of the 1A relay driver


 

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