
A
tPLH
Y
MC74VHCT138A
SWITCHING WAVEFORMS
VALID
1.5V
1.5V
VALID
3V
GND
tPHL
VOH
VOL
Figure 2.
E3
tPHL
Y
1.5V
1.5V
Figure 3.
E2 or E1
Y
1.5V
tPHL
1.5V
Figure 4.
3V
GND
tPLH
VOH
VOL
3V
GND
tPLH
VOH
VOL
TEST CIRCUIT
TEST POINT
OUTPUT
DEVICE
UNDER
TEST
CL*
*Includes all probe and jig capacitance
Figure 5. Test Circuit
http://onsemi.com
5