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MC74VHC540 Datasheet, PDF (5/8 Pages) Motorola, Inc – Octal Bus Buffer
◁
A
50%
tPHL
Y
50% VCC
Figure 1.
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 2.
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 3.
*Includes all probe and jig capacitance
Figure 4.
INPUT EQUIVALENT CIRCUIT
INPUT
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