SP720
100
T
A
= 25
o
C
SINGLE PULSE
2.5
T
A
= 25
o
C
SINGLE PULSE
80
FORWARD SCR CURRENT (mA)
FORWARD SCR CURRENT (A)
2
60
1.5
40
1
I
FWD
EQUIV. SAT. ON
THRESHOLD ~ 1.1V
0.5
V
FWD
20
0
600
800
1000
FORWARD SCR VOLTAGE DROP (mV)
1200
0
0
1
2
FORWARD SCR VOLTAGE DROP (V)
3
FIGURE 2. LOW CURRENT SCR FORWARD VOLTAGE DROP
CURVE
FIGURE 3. HIGH CURRENT SCR FORWARD VOLTAGE DROP
CURVE
+V
CC
+V
CC
INPUT
DRIVERS
OR
SIGNAL
SOURCES
LINEAR OR
DIGITAL IC
INTERFACE
IN 1-7
IN 9-15
TO +V
CC
V+
SP720
V-
SP720 INPUT
PROTECTION CIRCUIT
(1 OF 14 ON CHIP)
FIGURE 4. TYPICAL APPLICATION OF THE SP720 AS AN INPUT CLAMP FOR OVER-VOLTAGE, GREATER THAN 1V
BE
ABOVE V+ OR
LESS THAN -1V
BE
BELOW V-
6-5