A.S.D.鈩?/div>
FEATURES
DUAL PROGRAMMABLE TRANSIENT SUP-
PRESSOR.
WIDE NEGATIVE FIRING VOLTAGE RANGE :
V
MGL
= -80V max.
LOW DYNAMIC SWITCHING VOLTAGES :
V
FP
and V
DGL
.
LOW GATE TRIGGERING CURRENT :
I
GT
= 5mA max.
PEAK PULSE CURRENT :
I
PP
= 30A for 10/1000碌s surge.
HOLDING CURRENT :
I
H
= 150mA.
DESCRIPTION
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
-V
BAT
through the gate.
This component presents a very low gate trigge-
ring current (I
GT
) in order to reduce the current con-
sumption on printed circuit board during the firing
phase.
A particular attention has beengiven to the internal
wire bonding. The 鈥?-point鈥?configuration ensures
reliable protection, eliminating the overvoltage in-
troduced by the parasitic inductances of the wiring
(Ldi/dt), especially for very fast transients.
COMPLIESWITHTHE FOLLOWINGSTANDARDS :
CCITT K20 :
VDE 0433 :
VDE 0878 :
I3124 :
FCC part 68 :
10/700碌s
5/310碌s
10/700碌s
5/310碌s
1.2/50碌s
1/20碌s
0.5/700碌s
0.2/310碌s
2/10碌s
2/10碌s
1kV
25A
2kV
38A (*)
1.5kV
40A
1kV
25A
2.5kV
170A (*)
2.5kV
170A (*)
SO8
SCHEMATIC DIAGRAM
TIP 1
GATE 2
NC 3
RING 4
8 TIP
7 GND
6 GND
5 RING
BELLCORE
TR-NWT-001089 :
2/10碌s
2/10碌s
(*) with series resistors or PTC.
February 1998
Ed: 3
TM: ASD is trademarks of SGS-THOMSON Microelectronics.
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