IN74HC138A
AC ELECTRICAL CHARACTERISTICS
(CL=50pF,Input tr=tf=6.0 ns)
VCC
V
Guaranteed Limit
Symbol
Parameter
Unit
ns
25 °C
to
≤85°C ≤125°C
-55°C
tPLH, tPHL Maximum Propagation Delay, Input A to
Output Y (Figures 1 and 4)
2.0
4.5
6.0
135
27
170
34
205
41
23
29
35
tPLH, tPHL Maximum Propagation Delay , CS1 to
Output Y (Figures 2 and 4)
2.0
4.5
6.0
110
22
19
140
28
24
165
33
28
ns
tPLH, tPHL Maximum Propagation Delay , CS2 or CS3 to
Output Y (Figures 3 and 4)
2.0
4.5
6.0
120
24
20
150
30
26
180
36
31
ns
tTLH, tTHL Maximum Output Transition Time, Any Output
(Figures 2 and 4)
2.0
4.5
6.0
75
15
13
95
19
16
110
22
19
ns
CIN
Maximum Input Capacitance
-
10
10
10
pF
Power Dissipation Capacitance (Per Package)
Typical @25°C,VCC=5.0 V
CPD
Used to determine the no-load dynamic power
consumption:
55
pF
PD=CPDVCC2f+ICCVCC
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
144