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74HC_HCT123_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 13 July 2009
8 of 24
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); CL = 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter
Conditions
25
°C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min
Typ
Max
Min
Max
Min
Max
74HC123
tpd
propagation
delay
nRD, nA, nB to nQ or nQ;
CEXT = 0 pF;
REXT =5kΩ;
see Figure 9
[1]
VCC = 2.0 V
-
83
255
-
320
-
385
ns
VCC = 4.5 V
-
30
51
-
64
-
77
ns
VCC = 5 V; CL = 15 pF
-
26
-
-
-
-
-
ns
VCC = 6.0 V
-
24
43
-
54
-
65
ns
nRD (reset) to nQ or nQ;
CEXT = 0 pF;
REXT =5kΩ;
see Figure 9
VCC = 2.0 V
-
66
215
-
270
-
325
ns
VCC = 4.5 V
-
24
43
-
54
-
65
ns
VCC = 5 V; CL = 15 pF
-
20
-
-
-
-
-
ns
VCC = 6.0 V
-
19
37
-
46
-
55
ns
tt
output
transition time
see Figure 9
[1]
VCC = 2.0 V
-
19
75
-
95
-
110
ns
VCC = 4.5 V
-
7
15
-
19
-
22
ns
VCC = 6.0 V
-
6
13
-
16
-
19
ns
tW
pulse width
nA LOW; see Figure 10
VCC = 2.0 V
100
8
-
125
-
150
-
ns
VCC = 4.5 V
20
3
-
25
-
30
-
ns
VCC = 6.0 V
17
2
-
21
-
26
-
ns
nB HIGH; see Figure 10
VCC = 2.0 V
100
17
-
125
-
150
-
ns
VCC = 4.5 V
20
6
-
25
-
30
-
ns
VCC = 6.0 V
17
5
-
21
-
26
-
ns
nRD LOW; see Figure 11
VCC = 2.0 V
100
14
-
125
-
150
-
ns
VCC = 4.5 V
20
5
-
25
-
30
-
ns
VCC = 6.0 V
17
4
-
21
-
26
-
ns
nQ HIGH and nQLOW;
VCC = 5.0 V;
see Figure 10 and 11
[2]
CEXT = 100 nF;
REXT = 10 kΩ
-
450
-
-
-
-
-
µs
CEXT = 0 pF;
REXT =5kΩ
-75-
-
-
-
-
ns


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