Datasheet


W   
SCDS174B − AUGUST 2004 – REVISED MAY 2005
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16
V
+
GND
IN
V
BIAS
V
I
V
I
= V
IH
or V
IL
V
BIAS
= V
+
or GND
Capacitance is measured at NC,
NO, COM, and IN inputs during
ON and OFF conditions.
Capacitance
Meter
V
NO
V
NC
V
COM
NO
NC
COM
Figure 14. Capacitance (C
I
, C
COM(ON)
, C
NC(OFF)
, C
NO(OFF)
, C
NC(ON)
, C
NO(ON)
)
C
L
(2)
R
L
V
COM
V
+
GND
NC or NO
IN
V
NC
or V
NO
V
I
NC or NO
COM
Logic
Input
(1)
V
+
V
COM
50 Ω
R
L
C
L
35 pFt
ON
TEST
V
+
50 Ω 35 pFt
OFF
50%
t
ON
t
OFF
50%
90% 90%
Logic
Input
(V
I
)
V
+
Switch
Output
(V
NC
or V
NO
)
0
C
L
(2)
R
L
(1)
All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z
O
= 50 Ω, t
r
< 5 ns, t
f
< 5 ns.
(2)
C
L
includes probe and jig capacitance.
Figure 15. Turn-On (t
ON
) and Turn-Off Time (t
OFF
)
V
+
GND
NC or NO
IN
V
NC
or V
NO
V
I
NC or NO
COM
V
COM
C
L
(2)
R
L
t
BBM
50%
90% 90%
V
NC
or V
NO
= V
+
/2
R
L
= 50 Ω
C
L
= 35 pF
Logic
Input
(1)
Logic
Input
(V
I
)
Switch
Output
(V
COM
)
V
+
0
(1)
All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z
O
= 50 Ω, t
r
< 5 ns, t
f
< 5 ns.
(2)
C
L
includes probe and jig capacitance.
Figure 16. Break-Before-Make Time (t
BBM
)