TISP61511D, TISP61512P

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS

PROGRAMMABLE OVERVOLTAGE PROTECTORS

PRODUCT

INFORMATION

1

JULY 1995 - REVISED SEPTEMBER 1997

Copyright © 1997, Power Innovations Limited, UK

Information is current as of publication date. Products conform to specifications in accordance

with the terms of Power Innovations standard warranty. Production processing does not

necessarily include testing of all parameters.

PROGRAMMABLE SLIC OVERVOLTAGE PROTECTION

from 0 V (ground) and a negative voltage in the region of -10 V to -70 V. The protector gate is connected to

this negative supply. This references the protection (clipping) voltage to the negative supply voltage. As the

protection voltage will track the negative supply voltage the overvoltage stress on the SLIC is minimised.

Positive overvoltages are clipped to ground by diode forward conduction. Negative overvoltages are initially

clipped close to the SLIC negative supply rail value. If sufficient current is available from the overvoltage, then

the protector will crowbar into a low voltage on-state condition. As the current subsides the high holding

current of the crowbar prevents d.c. latchup.

These monolithic protection devices are fabricated in ion-implanted planar vertical power structures for high

reliability and in normal system operation they are virtually transparent. The buffered gate design reduces the

loading on the SLIC supply during overvoltages caused by power cross and induction.

q

Dual Voltage-Programmable Protectors.

- Wide 0 to -80 V Programming Range

- Low 5 mA max. Triggering Current

- High 150 mA min. Holding Current

q

Rated for International Surge Wave Shapes

q

Functional Replacements for

description

The TISP61511D and TISP61512P are dual

forward-conducting buffered p-gate overvoltage

protectors.

They

are

designed

to

protect

monolithic Subscriber Line Interface Circuits,

SLICs, against overvoltages on the telephone

line caused by lightning, ac power contact and

induction. The TISP61511D and TISP61512P

limit voltages that exceed the SLIC supply rail

voltage.

The SLIC line driver section is typically powered

VOLTAGE

WAVE SHAPE

STANDARD

A

2/10 µs

TR-NWT-001089

170

1.2/50 µs

ETS 300 047-1

90

0.5/700 µs

RLM88/I3124

40

10/700 µs

K17, K20, K21

40

10/1000 µs

TR-NWT-001089

30

DEVICE TYPE

PACKAGE TYPE

FUNCTIONAL

REPLACEMENT

LCP1511,

LCP1511D,

ATTL7591AS,

MGSS150-1

8-pin Small-Outline

TISP61511D

or order as

TISP61511DR

for Taped and Reeled

LCP1512,

LCP1512D,

ATTL7591AB,

MGSS150-2

8-pin Plastic DIP

TISP61512P

device symbol

Terminals K1, K2 and A correspond to the alternative

line designators of T, R and G or A, B and C. The

negative protection voltage is controlled by the voltage,

V

SD6XAE

A

K1

G

K2

MD6XAJ

'61512P PACKAGE

(TOP VIEW)

NC - No internal connection

Terminal typical application names shown in

parenthesis

1

2

3

4

5

6

7

8

K2

G

K1

NC

K1

A

A

K2

(Tip)

(Ground)

(Ground)

(Ring)

(Gate)

(Tip)

(Ring)

MD6XAL

'61511D PACKAGE

(TOP VIEW)

NC - No internal connection

Terminal typical application names shown in

parenthesis

1

2

3

4

5

6

7

8

K1

A

A

K2

G

K1

K2

NC

(Tip)

(Ground)

(Ground)

(Ring)

(Gate)

(Tip)

(Ring)