MC74VHCT540A_06 Datasheet, PDF (5/7 Pages) ON Semiconductor – Octal Bus Buffer

MC74VHCT540A
A
1.5V
t_PH
L
Y
1.5V
3.0V ^{OE1 or OE2}
GND
t_PLH
Y
V_OH
V_OL
Y
Figure 3. Switching Waveform
1.5V
t_PZL t_PLZ
1.5V
t_PZH t_PHZ
3.0V
50%
GND
HIGH
IMPEDANCE
V_OL +0.3V
V_OH −0.3V
1.5V
HIGH
IMPEDANCE
Figure 4. Switching Waveform
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
C_L*
*Includes all probe and jig capacitance
Figure 5. Test Circuit
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
1kΩ
C_L*
CONNECT TO V_CC WHEN
TESTING t_PLZ AND t_PZL.
CONNECT TO GND WHEN
TESTING t_PHZ AND t_PZH.
*Includes all probe and jig capacitance
Figure 6. Test Circuit
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