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| MC74VHC240_11 Datasheet, PDF (5/7 Pages) ON Semiconductor – Octal Bus Buffer/Line Driver Inverting with 3-State Outputs | |||
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A or B
50%
tPHL
YA or YB
50% VCC
Figure 2.
MC74VHC240
SWITCHING WAVEFORMS
VCC
GND
tPLH
OEA or OEB
YA or YB
YA or YB
50%
tPZL
tPLZ
50% VCC
tPZH
tPHZ
50% VCC
Figure 3.
VCC
GND
HIGH
IMPEDANCE
VOL +0.3V
VOH -0.3V
HIGH
IMPEDANCE
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
1 kΩ
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. Test Circuit
*Includes all probe and jig capacitance
Figure 5. Test Circuit
INPUT
Figure 6. Input Equivalent Circuit
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