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Applications Diagram

Typical Component Values

C5 = 0.5

µF, 30V, ±20%

PTC used as ring generator ballast.

NOTES:

4. Secondary protection diode bridge recommended is a 2A, 200V type.

to run separate grounds off a line card, the AG must be applied first.

6. Application shows Ring Injected Ringing.

RING

RING FEED

TIP

SLIC

HC5503T

RING

SUBSCRIBER

LOOP

-48V

SYSTEM CONTROLLER

1

9

10

2

TIP FEED

TIP

RX

TX

C1

BGND DGND AGND

SHD

13

11

12

6

23

3

21

24

20

19

18

5

5V

PRIMARY

PROTECTION

(NOTE 4)

PIN NUMBERS GIVEN FOR SOIC PACKAGE.

PTC

-48V

RING GENERATOR

RS

7

T3

T2

T1

FIGURE 1. TYPICAL LINE CIRCUIT APPLICATION WITH THE MONOLITHIC SLIC

HC5503T