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TISP6L7591
DUAL FORWARD-CONDUCTING P-GATE THYRISTORS
PROGRAMMABLE OVERVOLTAGE PROTECTORS
*R
TISP6L7591 SLIC Protector
Rated for Standard Lightning Wave Shapes
Wave Shape
2/10
10/700
10/1000
Standard
GR-1089-CORE
I
PP
A
鹵80
D Package (Top View)
TIP
V
S
NC
RING
1
2
3
4
8
7
6
5
PT
GND
GND
PR
MD6XAND
ITU-T K.20 & K.21
鹵40
GR-1089-CORE
鹵30
Rated for AC Fault Currents
AC
Hz
50/60
1
Time I
TSM
s
0.01
A
鹵5
鹵3.5
Device Symbol
TIP (1)
PT (8)
GND (7)
V
S
(2)
GND (6)
Gate Trigger Current ............................................... 15 mA max.
High V
S
Voltage ......................................................... -80 V max.
High Holding Current ............................................. 150 mA min.
............................................ UL Recognized Components
Pin
1
Symbol
TIP
V
S
NC
RING
Comment
Line-side TIP
Supply voltage
to Gate
No Internal
connection
Line-side RING
Pin
8
7
6
5
Symbol
PT
GND
GND
PR
RING (4)
PR (5)
SD6XAEE
Comment
Protected TIP
to SLIC
Ground
Ground
Protected RING
to SLIC
Description
The TISP6L7591 is a dual forward-conducting buffered p-gate
overvoltage protector. It is designed to protect monolithic SLICs
(Subscriber Line Interface Circuits) against overvoltages on the
telephone line caused by lightning, a.c. power contact and
induction. The TISP6L7591 limits voltages that exceed the SLIC
supply rail voltage.
The SLIC line driver section is typically powered from 0 V (ground)
and a negative voltage, V
S
, in the region of -20 V to -80 V. The
protector gate is connected to this negative supply. This
references the protection (clipping) voltage to the negative supply
voltage. The negative protection voltage will then track the
negative supply voltage and the overvoltage stress on the SLIC is
minimized.
2
3
4
Note: Pins 1 and 4 must always be connected to the protection
resistors shown in Figures 2 and 3 (Line Feed Circuitry).
The SLIC can be connected either to the protected
outputs (pins 5 and 8) or to the inputs (pins 1 and 4).
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 switch into a low voltage on-state
condition. As the overvoltage subsides the high holding current of TISP6L7591 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 TISP6L7591 is available in 8-pin plastic small-outline surface mount package.
How To Order
For Standard
Termination Finish
Order As
TISP6L7591DR
Device
Package
Carrier
For Lead Free
Termination Finish
Order As
TISP6L7591DR-S
TISP6L7591 D (8-pin Small-Outline) R (Embossed Tape Reeled)
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
MAY 2002 - REVISED FEBRUARY 2005
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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