STLC5444

STLC5444 QUAD FEEDER POWER SUPPLY SUPPLIES POWER FOR UP TO FOUR DIGITAL TELEPHONE LINES CONFORMS TO THE CCITT RECOMMENDATIONS FOR POWER FEED AT THE S OR T REFERENCE POINTS SUPPORTS POINT-TO-POINT AND POINT TO MULTIPOINT CONFIGURATIONS EACH OF THE FOUR LINES IS INDIVIDUALLY CONTROLLED HIGH-VOLTAGE BCD TECHNOLOGY SUPPORTING UP TO -130V AUTOMATIC THERMAL SHUTDOWN STATUS CONDITION DETECTION (BY MICROPROCESSOR) FOR EACH LINE: – Low output voltage – Openloop – Current overload – Thermal overload – Normal line condition PROGRAMMABLE CURRENT LIMITING OUTPUT CURRENT UP TO 120mA DESCRIPTION The ISDN Quad Feeder Power Supply (IQFPS) provides a power source for up to four line interfaces. The power source to the device is a local battery or a centralized regulated power supply. It can operate in point-to-point and point-to-multipoint configurations as far as S interface is concerned. By the device microprocessor interface, each powered line is individually controlled and monitored. Therefore, overloads and faults are easy to detect and localize even in a large system. The status conditions detected by the device on each line that may be read by the microprocessor are : low output voltage openloop current overload thermal overload normal line conditions A hardware current limiting programmable feature is available. DIP24 PLCC44 ORDERING NUMBERS: STLC5444B1 (DIP24) STLC5444FN (PLCC44) DIP24 PIN CONNECTION (Top view) D1 D0 INT BGND VCC ILIM N.C. VBB N.C. S0 S1 VBB 1 2 3 4 5 6 7 8 9 10...