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| 74HCT123PW Datasheet, PDF (14/25 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset | |||
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NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
tW
VI 90 %
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 8.
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.
Fig 12. Test circuit for measuring switching times
Table 8. Test data
Type
Input
74HC123
74HCT123
VI
tr, tf
VCC
6 ns
3V
6 ns
Load
CL
15 pF, 50 pF
15 pF, 50 pF
RL
1 kï
1 kï
S1 position
tPHL, tPLH
open
open
74HC_HCT123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 â 16 December 2011
© NXP B.V. 2011. All rights reserved.
14 of 25
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