74HC245 データシートの表示（PDF） - ON Semiconductor
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74HC245 Datasheet PDF : 8 Pages
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74HC245
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INPUT
A OR B
tPLH
OUTPUT
B OR A
90%
50%
10%
90%
50%
10%
tTLH
DIRECTION
tf
VCC
GND
tPHL
OUTPUT
ENABLE
A OR B
tTHL
A OR B
Figure 3. Switching Waveform
50%
tPZL tPLZ
50%
tPZH tPHZ
50%
50%
VCC
GND
VCC
10%
90%
GND
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE
Figure 4. Switching Waveform
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
*Includes all probe and jig capacitance
Figure 5. Test Circuit
DEVICE
UNDER
TEST
TEST POINT
OUTPUT 1 kW
CL*
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
*Includes all probe and jig capacitance
Figure 6. Test Circuit
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