MC74HC4538AFR2 查看數據表（PDF） - ON Semiconductor
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MC74HC4538AFR2 Datasheet PDF : 12 Pages
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MC74HC4538A
SWITCHING WAVEFORMS
tw(H)
VCC
50%
A
GND
tw(L)
B
VCC
50%
GND
tPLH
τ
tPLH
τ
50%
Q
tPHL
τ
Q
50%
tPHL
τ
tr
tf
Figure 6.
90%
VCC
A
10%
GND
trr
VCC
50%
B
GND
tf
tf
90%
VCC
RESET
50%
10%
GND
tTLH
tw(L)
trec
tPHL
τ + trr
90%
50%
Q
10%
50% (RETRIGGERED PULSE)
tTHL
Q
90%
10%
tPLH
50%
Figure 7.
TEST POINT
OUTPUT
DEVICE
UNDER
TEST
CL*
*Includes all probe and jig capacitance
Figure 8. Test Circuit
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