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74HC123 Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. 74HC123
Description  Dual retriggerable monostable multivibrator with reset
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC123 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/HCT123
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr =tf = 6 ns; CL =50pF
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.
tPLH
propagation delay
nRD, nA, nB to nQ
83
30
24
255
51
43
320
64
54
385
77
65
ns
2.0
4.5
6.0
CEXT = 0 pF;
REXT =5kΩ
tPLH
propagation delay
nRD, nA, nB to nQ
83
30
24
255
51
43
320
64
54
385
77
65
ns
2.0
4.5
6.0
CEXT = 0 pF;
REXT =5kΩ
tPHL
propagation delay
nRD to nQ (reset)
66
24
19
215
43
37
270
54
46
325
65
55
ns
2.0
4.5
6.0
CEXT = 0 pF;
REXT =5kΩ
tPLH
propagation delay
nRD to nQ (reset)
66
24
19
215
43
37
270
54
46
325
65
55
ns
2.0
4.5
6.0
CEXT = 0 pF;
REXT =5kΩ
tTHL / tTLH
output transition
time
19
7
6
75
15
13
95
19
16
110
22
19
ns
2.0
4.5
6.0
tW
trigger pulse width
nA = LOW
100
20
17
8
3
2
125
25
21
150
30
26
ns
2.0
4.5
6.0
Fig.7
tW
trigger pulse width
nB = HIGH
100
20
17
17
6
5
125
25
21
150
30
26
ns
2.0
4.5
6.0
Fig.7
tW
reset pulse width
nRD = LOW
100
20
17
14
5
4
125
25
21
150
30
26
ns
2.0
4.5
6.0
Fig.8
tW
output pulse width
nQ = HIGH
nQ = LOW
450
−−
µs
5.0
CEXT = 100 nF;
REXT =10kΩ;
Figs 7 and 8
tW
output pulse width
nQ = HIGH
nQ = LOW
75
−−
ns
5.0
CEXT = 0 pF;
REXT =5kΩ;
note 1; Figs 7 and 8
trt
retrigger time
nA, nB
110
−−
ns
5.0
CEXT = 0 pF;
REXT =5kΩ;
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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