Application Specific Discretes

A.S.D.

™

LCP1511D

PROGRAMMABLE TRANSIENT VOLTAGE

SUPPRESSOR FOR SLIC PROTECTION

®

DUAL PROGRAMMABLE TRANSIENT SUP-

PRESSOR.

WIDE NEGATIVE FIRING VOLTAGE RANGE :

LOW DYNAMIC SWITCHING VOLTAGES :

LOW GATE TRIGGERING CURRENT :

PEAK PULSE CURRENT :

µs surge.

HOLDING CURRENT :

FEATURES

SO8

This device has been especially designed to pro-

tect subscriber line card interfaces (SLIC) against

transient overvoltages.

Positive overloads are clipped with 2 diodes.

Negative surges are suppressed by 2 thyristors,

their breakdown voltage being referenced to

This component presents a very low gate trigge-

sumption on printed circuit board during the firing

phase.

A particular attention has been given to the internal

wire bonding. The ”4-point” configuration ensures

reliable protection, eliminating the overvoltage in-

troduced by the parasitic inductances of the wiring

(Ldi/dt), especially for very fast transients.

DESCRIPTION

February 1998

Ed: 3

SCHEMATIC DIAGRAM

GND

GND

TIP

TIP

RING

RING

1

2

3

45

6

7

8

GATE

NC

CCITT K20 :

10/700

µs

1kV

5/310

µs

25A

VDE 0433 :

10/700

µs

2kV

5/310

µs

38A (*)

VDE 0878 :

1.2/50

µs

1.5kV

1/20

µs

40A

I3124 :

0.5/700

µs

1kV

0.2/310

µs

25A

FCC part 68 :

2/10

µs

2.5kV

2/10

µs

170A (*)

BELLCORE

TR-NWT-001089 : 2/10

µs

2.5kV

2/10

µs

170A (*)

(*) with series resistors or PTC.

COMPLIESWITH THE FOLLOWINGSTANDARDS :

TM: ASD is trademarks of SGS-THOMSON Microelectronics.

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