TISP61089M Datasheet, PDF (1/6 Pages) Bourns Electronic Solutions – TISP61089M SLIC Overvoltage Protector

*RoHS ^COMPLIANT
TISP61089M
PROGRAMMABLE OVERVOLTAGE PROTECTOR
DUAL FORWARD-CONDUCTING P-GATE THYRISTOR
TISP61089M SLIC Overvoltage Protector
High 70 A 5/310 Capability
Dual Voltage-Programmable Protector
- Supports Voltages Down to -155 V
- Low 5 mA max. Gate Triggering Current
- High 150 mA min. Holding Current
Description
The TISP61089M is a dual forward-conducting buffered p-gate over-
voltage 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 TISP61089M limits
voltages that exceed the SLIC supply rail voltage. The TISP61089M
parameters are specified to allow equipment compliance with Bellcore
GR-1089-CORE, ITU-T K.21 and K.45 and YD/T-950.
The SLIC line driver section is typically powered from 0 V (ground) and a
negative voltage in the region of -20 V to -155 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 then track the negative supply voltage, the overvoltage stress on the
SLIC is minimized.
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 overvoltage subsides, the high holding current of the crowbar helps
prevent 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 TISP61089M buffered gate
design reduces the loading on the SLIC supply during overvoltages
caused by power cross and induction. The TISP61089M is available in
an 8-pin plastic small-outline surface mount package.
8 Pin Small-Outline (D008) Package (Top View)
(Tip) K1 ¹
(Gate) G
2
8 K1 (Tip)
7 A (Ground)
NC 3
6 A (Ground)
(Ring) K2 4
5 K2 (Ring)
MD6XANB
NC - No internal connection
Terminal typical application names shown in
parenthesis
Device Symbol
K1
K1
A
G
A
K2
K2
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, VGG, applied to the G terminal.
SD6XAEBa
How to Order
Device
Package
Carrier
TISP61089M 8 Pin Small Outline (D008) Embossed Tape Reeled
Order As
TISP61089MDR-S
Marking Code
1089M
Standard Quantity
2500
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
SEPTEMBER 2013
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.