3
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NC7ST32
AC Electrical Characteristics
Note 3: CPD is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (ICCD) at no output
loading and operating at 50% duty cycle. (See Figure 2.) CPD is related to ICCD dynamic operating current by the expression:
ICCD = (CPD) (VCC) (fIN) + (ICCstatic).
AC Loading and Waveforms
CL includes load and stray capacitance
Input PRR
= 1.0 MHz, t
w = 500 ns
FIGURE 1. AC Test Circuit
Input
= AC Waveform; PRR = Variable; Duty Cycle = 50%
FIGURE 2. ICCD Test Circuit
FIGURE 3. AC Waveforms
Symbol
Parameter
VCC
TA = +25°CTA = 40°C to +85°C
Units
Conditions
Fig. No.
(V)
Min
Typ
Max
Min
Max
tPLH,
Propagation Delay
5.0
4.3
12
ns
CL = 15 pF
Figures
1, 3
tPHL
6.1
17
4.5
6.5
16
20
ns
CL = 50 pF
12.0
27
31
5.5
5.4
14
18
10.7
26
30
tTLH,
Output Transition Time
5.0
4
10
ns
CL = 15 pF
Figures
1, 3
tTHL
4.5
11
25
31
ns
CL = 50 pF
5.5
10
21
26
CIN
Input Capacitance
Open
2
10
pF
CPD
Power Dissipation Capacitance
5.0
6
pF
(Note 3)
Figure 2