Datasheet

74HC_HCT123 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 9 — 19 January 2015 14 of 25
NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Test data is given in Table 8.
Definitions test circuit:
R
T
= Termination resistance should be equal to output impedance Z
o
of the pulse generator.
C
L
= Load capacitance including jig and probe capacitance.
R
L
= Load resistance.
S1 = Test selection switch.
Fig 12. Test circuit for measuring switching times
9
0
9
0
W
:
W
:


9
9
,
9
,
QHJDWLYH
SXOVH
SRVLWLYH
SXOVH
9
9
0
9
0


W
I
W
U
W
U
W
I
DDG
'87
9
&&
9
&&
9
,
9
2
5
7
 5
/
6
&
/
RSHQ
*
Table 8. Test data
Type Input Load S1 position
V
I
t
r
, t
f
C
L
R
L
t
PHL
, t
PLH
74HC123 V
CC
6 ns 15 pF, 50 pF 1 k open
74HCT123 3 V 6 ns 15 pF, 50 pF 1 k open