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STLC5444

QUAD FEEDER POWER SUPPLY

SUPPLIES POWER FOR UP TO FOUR DIGI-

TAL TELEPHONE LINES

CONFORMS TO THE CCITT RECOMMEN-

DATIONS 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 INDIVIDU-

ALLY CONTROLLED

HIGH-VOLTAGE BCD TECHNOLOGY SUP-

PORTING UP TO -130V

AUTOMATIC THERMAL SHUTDOWN

STATUS CONDITION DETECTION (BY MI-

CROPROCESSOR) FOR EACH LINE:

鈥?Low output voltage

鈥?Openloop

鈥?Current overload

鈥?Thermal overload

鈥?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 inter-

faces. 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-mul-

tipoint configurations as far as S interface is con-

cerned.

By the device microprocessor interface, each

powered line is individually controlled and moni-

tored.

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

11

12

D94TL102

24

23

22

21

20

19

18

17

16

15

14

13

D2

D3

A0

DGND

ALE

WR

CS

RD

RESET

S3

RSRVD

S2

December 1997

1/17

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