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コンポーネント説明
MC74VHC244DW データシートの表示(PDF) - ON Semiconductor
部品番号
コンポーネント説明
メーカー
MC74VHC244DW
Octal Bus Buffer
ON Semiconductor
MC74VHC244DW Datasheet PDF : 8 Pages
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MC74VHC244
SWITCHING WAVEFORMS
A or B
50%
t
PLH
YA or YB
50% V
CC
V
CC
GND
t
PHL
Figure 3. Switching Waveform
OEA or OEB
YA or YB
YA or YB
50%
t
PZL
t
PLZ
50% V
CC
t
PZH
t
PHZ
50% V
CC
V
CC
GND
HIGH
IMPEDANCE
V
OL
+0.3V
V
OH
-0.3V
HIGH
IMPEDANCE
Figure 4. Switching Waveform
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
C
L
*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
1 k
W
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 5. Test Circuit
*Includes all probe and jig capacitance
Figure 6. Test Circuit
INPUT
Figure 7. Input Equivalent Circuit
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