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74HC423 Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. 74HC423
Description  Dual retriggerable monostable multivibrator with reset
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC423 Datasheet(HTML) 6 Page - NXP Semiconductors

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1998 Jul 08
6
Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
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
Tamb (°C)
UNIT
TEST CONDITIONS
74HC
VCC
(V)
WAVEFORMS/
NOTES
+25
−40 to +85 −40 to +125
min. typ. max
min max min.
max.
tPHL/ tPLH
propagation delay
nA, nB to nQ, nQ
80
255
320
385
ns
2.0
CEXT = 0 pF;
REXT =5 kΩ
29
51
64
77
4.5
23
43
54
65
6.0
tPHL/ tPLH
propagation delay
nRD to nQ, nQ
66
215
270
325
ns
2.0
CEXT = 0 pF;
REXT =5 kΩ
24
43
54
65
4.5
19
37
46
55
6.0
tTHL/ tTLH
output transition time
19
75
95
110
ns
2.0
7
15
19
22
4.5
6
13
16
19
6.0
tW
trigger pulse width
nA = LOW
100
11
125
150
ns
2.0
Fig.7
20
4
25
30
4.5
17
3
21
26
6.0
tW
trigger pulse width
nB = HIGH
100
17
125
150
ns
2.0
Fig.7
20
6
25
30
4.5
17
5
21
26
6.0
tW
reset pulse width
nRD = LOW
100
14
125
150
ns
2.0
Fig.8
20
5
25
30
4.5
17
4
21
26
6.0
tW
output pulse width
nQ = HIGH
nQ = LOW
450
−−
µs
5.0
CEXT = 100 nF;
REXT = 10 kΩ;
Figs 7 and 8
tW
output pulse width
nQ = HIGH
nQ = LOW
75
−−
ns
5.0
CEXT = 0 pF;
REXT =5 kΩ;
note 1;
Figs 7 and 8
trt
retrigger time
nA, nB
110
−−
ns
5.0
CEXT = 0 pF;
REXT =5 kΩ;
note 2; Fig. 7
REXT
external timing resistor
10
2
1000
1000
−−
k
2.0
5.0
Fig.9
CEXT
external timing capacitor
no limits
pF
5.0
Fig.9; note 3


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