IN74HCT138A
AC ELECTRICAL CHARACTERISTICS(V
CC
=5.0 V, C
L
=50pF,Input t
r
=t
f
=6.0 ns)
Guaranteed Limit
Unit
Symbol
Parameter
25
°C ≤85°C ≤125
to
°C
-55°C
t
PLH
,
Maximum Propagation Delay, Input A to
30
38
45
ns
t
PHL
Output Y (Figures 1 and 4)
t
PLH
,
Maximum Propagation Delay , CS1 to
27
34
41
ns
t
PHL
Output Y (Figures 2 and 4)
t
PLH
,
Maximum Output Transition Time , CS2
30
38
45
ns
t
PHL
or CS3 to Output Y (Figures 3 and 4)
15
19
22
ns
t
TLH
, t
THL
Maximum Output Transition Time, Any
Output
(Figures 2 and 4)
C
IN
Maximum Input Capacitance
10
10
10
pF
Power Dissipation Capacitance (Per
Enabled Output)
Used to determine the no-load dynamic
power
consumption:
2
P
D
=C
PD
V
CC
f+I
CC
V
CC
Typical @25°C,V
CC
=5.0
V
51
C
PD
pF
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
4
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