A.S.D.鈩?/div>
FEATURES
UNIDIRECTIONAL FUNCTION
PROGRAMMABLE BREAKDOWN VOLTAGE
UP TO 250 V
PROGRAMMABLE CURRENT LIMITATION
FROM 40 mA TO 500 mA
SURGE CURRENT CAPABILITY
I
PP
= 30A 10/1000
碌s
DESCRIPTION
Dedicated to sensitive telecom equipment
protection, this device can provide both voltage
and current triggered protection with a very tight
tolerance.
The breakdown voltage can be easily programmed
by using an external zener diode.
A multiple protection mode can be also performed
when using several zener diodes, providing to
each line interface an optimized protection level.
The current limiting function is achieved with the
use of a resistorbetween the gate and the cathode.
The value of the resistor will determine the level of
the desired current.
COMPLIESWITHTHE FOLLOWINGSTANDARDS :
CCITT K17 :
VDE 0433 :
CNET :
FCC part 68 :
BELLCORE
TR-NWT-000974 :
(*) with series resistors or PTC.
OVERVOLTAGE and OVERCURRENT
PROTECTION for TELECOM LINE
SO8
SCHEMATIC DIAGRAM
10/700
5/310
10/700
5/310
0.5/700
0.2/310
2/10
2/10
碌s
碌s
碌s
碌s
碌s
碌s
碌s
碌s
1.5
38
2k
40
1.5
38
2.5
75
kV
A
V
A (*)
kV
A
kV
A (*)
10/1000
碌s
10/1000
碌s
1 kV
30 A (*)
TM: ASD is trademarks of SGS-THOMSON Microelectronics.
February 1998 - Ed: 4
1/7