74HCT423N 查看數據表（PDF） - Philips Electronics
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74HCT423N Datasheet PDF : 14 Pages
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Philips Semiconductors
Dual retriggerable monostable
multivibrator with reset
Product specification
74HC/HCT423
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard (except for nREXT /CEXT)
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
SYMBOL
PARAMETER
tPHL/ tPLH propagation delay
nA, nB to nQ, nQ
tPHL/ tPLH propagation delay
nRD to nQ, nQ
tTHL/ tTLH output transition time
Tamb (°C)
TEST CONDITIONS
74HC
+25
−40 to +85
−40 to +125
UNIT
VCC
(V)
min. typ. max min max min. max.
WAVEFORMS/
NOTES
80 255
320
385 ns
2.0 CEXT = 0 pF;
29 51
64
77
4.5 REXT = 5 kΩ
23 43
54
65
6.0
66 215
270
325 ns
2.0 CEXT = 0 pF;
24 43
54
65
4.5 REXT = 5 kΩ
19 37
46
55
6.0
19 75
95
110 ns 2.0
7 15
19
22
4.5
6 13
16
19
6.0
tW
trigger pulse width
100 11
nA = LOW
20 4
125
150
25
30
17 3
21
26
tW
trigger pulse width
100 17
nB = HIGH
20 6
125
150
25
30
17 5
21
26
tW
reset pulse width
nRD = LOW
100 14
20 5
125
150
25
30
17 4
21
26
tW
output pulse width
nQ = HIGH
nQ = LOW
450
−
−
tW
output pulse width
nQ = HIGH
nQ = LOW
75
−
−
trt
retrigger time
nA, nB
110
−
−
REXT
external timing resistor 10
1000 −
−
2
1000
CEXT
external timing capacitor no limits
ns 2.0 Fig.7
4.5
6.0
ns 2.0 Fig.7
4.5
6.0
ns 2.0 Fig.8
4.5
6.0
µs
5.0 CEXT = 100 nF;
REXT = 10 kΩ;
Figs 7 and 8
ns
5.0 CEXT = 0 pF;
REXT = 5 kΩ;
note 1;
Figs 7 and 8
ns
5.0 CEXT = 0 pF;
REXT = 5 kΩ;
note 2; Fig. 7
kΩ 2.0 Fig.9
5.0
pF 5.0 Fig.9; note 3
1998 Jul 08
6
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