74HC42D,652 查看數據表（PDF） - NXP Semiconductors.
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74HC42D,652 Datasheet PDF : 23 Pages
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NXP Semiconductors
74HC423; 74HCT423
Dual retriggerable monostable multivibrator with reset
nB input
nRD input
nQ output
tW
tW
nA = LOW.
Fig 11. Output pulse control using reset input nRD
tW
mna522
VI 90 %
tW
negative
pulse
VM
GND
10 %
tf
tr
VI
90 %
positive
pulse
VM
10 %
GND
tW
VCC
VI
G
DUT
RT
VM
tr
tf
VM
VO
CL
001aah768
Test data is given in Table 9.
Definitions for test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
Fig 12. Test circuit for measuring switching times
Table 9. Test data
Supply
Input
VCC
VI
2.0 V to 6.0 V
VCC
tr, tf
6 ns
Load
CL
15 pF, 50 pF
74HC_HCT423_3
Product data sheet
Rev. 03 — 24 July 2008
© NXP B.V. 2008. All rights reserved.
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