NXP Semiconductors
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7.
Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit see
Symbol Parameter
74HC123
t
pd
propagation
delay
nRD, nA, nB to nQ or nQ;
C
EXT
= 0 pF;
R
EXT
= 5 k;
see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 5 V; C
L
= 15 pF
V
CC
= 6.0 V
nRD (reset) to nQ or nQ;
C
EXT
= 0 pF;
R
EXT
= 5 k;
see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 5 V; C
L
= 15 pF
V
CC
= 6.0 V
t
t
transition time see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
t
W
pulse width
nA LOW; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
nB HIGH; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
nRD LOW; see
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
nQ HIGH and nQ LOW;
V
CC
= 5.0 V;
see
and
C
EXT
= 100 nF;
R
EXT
= 10 k
C
EXT
= 0 pF;
R
EXT
= 5 k
74HC_HCT123
Conditions
Min
25
C
Typ
Max
40 C
to +85
C 40 C
to +125
C
Unit
Min
Max
Min
Max
-
-
-
-
83
30
26
24
255
51
-
43
-
-
-
-
320
64
-
54
-
-
-
-
385
77
-
65
ns
ns
ns
ns
-
-
-
-
66
24
20
19
19
7
6
8
3
2
17
6
5
14
5
4
215
43
-
37
75
15
13
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
125
25
21
125
25
21
125
25
21
270
54
-
46
95
19
16
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
150
30
26
150
30
26
150
30
26
325
65
-
55
110
22
19
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
-
-
-
100
20
17
100
20
17
100
20
17
-
-
450
75
-
-
-
-
-
-
-
-
-
-
s
ns
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 8 — 16 December 2011
8 of 25
PHILIPS [ NXP SEMICONDUCTORS ]
