ATTL7554AP

Manufacturer Part NumberATTL7554AP
ManufacturerBourns, Inc.
ATTL7554AP datasheet
 


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Copyright © 1997, Power Innovations Limited, UK
PROGRAMMABLE SLIC OVERVOLTAGE PROTECTION
Dual Voltage-Programmable Protectors.
- Wide 0 to -80 V Programming Range
- Low 5 mA max. Triggering Current
- High 150 mA min. Holding Current
Rated for International Surge Wave Shapes
VOLTAGE
STANDARD
WAVE SHAPE
2/10 µs
TR-NWT-001089
1.2/50 µs
ETS 300 047-1
0.5/700 µs
RLM88/I3124
10/700 µs
K17, K20, K21
10/1000 µs
TR-NWT-001089
Functional Replacements for
DEVICE TYPE
PACKAGE TYPE
LCP1511,
LCP1511D,
8-pin Small-Outline
ATTL7591AS,
MGSS150-1
LCP1512,
LCP1512D,
8-pin Plastic DIP
ATTL7591AB,
MGSS150-2
description
The TISP61511D and TISP61512P are dual
forward-conducting buffered p-gate overvoltage
protectors.
They
are
designed
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
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.
P R O D U C T
I N F O R M A T I O N
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.
DUAL FORWARD-CONDUCTING P-GATE THYRISTORS
PROGRAMMABLE OVERVOLTAGE PROTECTORS
(Tip)
(Gate)
(Ring)
I
TSP
A
170
Terminal typical application names shown in
90
40
40
30
(Tip)
(Gate)
FUNCTIONAL
REPLACEMENT
(Ring)
TISP61511D
or order as
Terminal typical application names shown in
TISP61511DR
for Taped and Reeled
device symbol
TISP61512P
K1
to
protect
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
applied to the G terminal.
GG,
TISP61511D, TISP61512P
JULY 1995 - REVISED SEPTEMBER 1997
'61511D PACKAGE
(TOP VIEW)
K1
1
8
K1
(Tip)
G
A
(Ground)
2
7
NC
6
A
(Ground)
3
K2
5
K2
(Ring)
4
MD6XAL
NC - No internal connection
parenthesis
'61512P PACKAGE
(TOP VIEW)
K1
1
8
K1
(Tip)
G
A
(Ground)
2
7
NC
A
3
6
(Ground)
K2
K2
(Ring)
4
5
MD6XAJ
NC - No internal connection
parenthesis
G
K2
A
SD6XAE
1

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