Nexperia
Table 8. Measurement points
Input
Output
VM
0.5VCC
VM
0.5VCC
74HC4538-Q100
Dual retriggerable precision monostable multivibrator
VX
0.1VCC
VY
0.9VCC
VI 90 %
tW
negative
pulse
VM
10 %
0V
tf
VI
positive
pulse
tr
90 %
VM
10 %
0V
tW
VM
tr
tf
VM
VI
G
VCC
VO
DUT
RT
VCC
RL S1
CL
open
001aad983
Test data is given in Table 9 .
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch
Figure 9. Test circuit for measuring switching times
Table 9. Test data
Input
VI
tr, tf
VCC
6 ns
Load
CL
15 pF, 50 pF
RL
1 kΩ
S1 position
tPHL, tPLH
open
74HC4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 17 March 2017
© Nexperia B.V. 2017. All rights reserved.
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