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MC74VHC540_11 Datasheet, PDF (4/7 Pages) ON Semiconductor – Octal Bus Buffer
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A
50%
tPHL
Y
50% VCC
Figure 2.
MC74VHC540
SWITCHING WAVEFORMS
VCC
OE1 or OE2
GND
tPLH
Y
50%
tPZL tPLZ
50% VCC
tPZH tPHZ
VCC
50%
GND
HIGH
IMPEDANCE
VOL +0.3V
VOH -0.3V
Y
50% VCC
HIGH
IMPEDANCE
Figure 3.
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
CL*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
1kΩ
CL*
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
*Includes all probe and jig capacitance
Figure 4.
*Includes all probe and jig capacitance
Figure 5.
INPUT EQUIVALENT CIRCUIT
INPUT
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