MC74HC138A_05 查看數據表（PDF） - ON Semiconductor
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MC74HC138A_05 Datasheet PDF : 8 Pages
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INPUT A
tPLH
OUTPUT Y
MC74HCT138A
SWITCHING WAVEFORMS
VALID
1.3 V
1.3 V
VALID
tPHL
tr
3V
INPUT CS1
2.7 V
1.3 V
0.3 V
GND
tPHL
OUTPUT Y
90%
1.3 V
10%
tTHL
Figure 1.
Figure 2.
tr
INPUT
CS2, CS3
2.7 V
1.3 V
0.3 V
tPHL
OUTPUT Y
90%
1.3 V
10%
tTHL
Figure 3.
tf
3V
GND
tPLH
tTLH
tf
3V
GND
tPLH
tTLH
TEST CIRCUIT
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
*Includes all probe and jig capacitance
Figure 4.
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