NC7S08
AC Electrical Characteristics
Symbol
t
PLH
,
t
PHL
Parameter
Propagation Delay
V
CC
(V)
5.0
2.0
3.0
4.5
6.0
t
TLH
,
t
THL
Output Transition Time
5.0
2.0
3.0
4.5
6.0
C
IN
C
PD
Input Capacitance
Power Dissipation Capacitance
Open
5.0
Min
T
A
25
q
C
Typ
3.5
20
11
8
7
3.0
25
16
11
9
2
6
Max
15
100
27
20
17
10
125
35
25
21
10
T
A
40
q
C to
85
q
C
Max
125
35
25
21
Min
Units
ns
Conditions
C
L
15 pF
Figure
Number
ns
C
L
50 pF
Figures
1, 3
ns
155
45
31
26
10
pF
pF
ns
C
L
15 pF
Figures
1, 3
C
L
50 pF
(Note 4)
Figure 2
Note 4:
C
PD
is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (I
CCD
) at no output
loading and operating at 50% duty cycle. (See Figure 2.) C
PD
is related to I
CCD
dynamic operating current by the expression:
I
CCD
(C
PD
)(V
CC
)(f
IN
)
(I
CC
static).
AC Loading and Waveforms
C
L
includes load and stray capacitance
Input PRR
1.0 MHz; t
W
500 ns
FIGURE 1. AC Test Circuit
FIGURE 3. AC Waveforms
Input
PRR
AC Waveform;
variable; Duty Cycle
50%
FIGURE 2. I
CCD
Test Circuit
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