Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HC
SYMBOL
PARAMETER
UNIT V
CC
+25
−40
to +85
−40
to +125
(V)
min. typ. max. min. max. min. max.
83
30
24
83
30
24
66
24
19
66
24
19
19
7
6
100
20
17
100
20
17
100
20
17
8
3
2
17
6
5
14
5
4
450
255
51
43
255
51
43
215
43
37
215
43
37
75
15
13
125
25
21
125
25
21
125
25
21
−
320
64
54
320
64
54
270
54
46
270
54
46
95
19
16
150
30
26
150
30
26
150
30
26
−
385
77
65
385
77
65
325
65
55
325
65
55
110
22
19
ns
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
5.0
74HC/HCT123
TEST CONDITIONS
WAVEFORMS/
NOTES
t
PLH
propagation delay
nR
D
, nA, nB to nQ
propagation delay
nR
D
, nA, nB to nQ
propagation delay
nR
D
to nQ (reset)
propagation delay
nR
D
to nQ (reset)
output transition
time
trigger pulse width
nA = LOW
trigger pulse width
nB = HIGH
reset pulse width
nR
D
= LOW
output pulse width
nQ = HIGH
nQ = LOW
output pulse width
nQ = HIGH
nQ = LOW
retrigger time
nA, nB
external timing
resistor
external timing
capacitor
10
2
C
EXT
= 0 pF;
R
EXT
= 5 kΩ
C
EXT
= 0 pF;
R
EXT
= 5 kΩ
C
EXT
= 0 pF;
R
EXT
= 5 kΩ
C
EXT
= 0 pF;
R
EXT
= 5 kΩ
t
PLH
ns
t
PHL
ns
t
PLH
ns
t
THL
/ t
TLH
ns
t
W
ns
Fig.7
t
W
ns
Fig.7
t
W
ns
Fig.8
C
EXT
= 100 nF;
R
EXT
= 10 kΩ;
Figs 7 and 8
C
EXT
= 0 pF;
R
EXT
= 5 kΩ;
note 1; Figs 7 and 8
C
EXT
= 0 pF;
R
EXT
= 5 kΩ;
note 2; Fig.7
Fig.9
Fig.9; note 3
t
W
µs
t
W
75
−
−
ns
5.0
t
rt
R
EXT
C
EXT
110
−
1000
−
1000
no limits
−
−
ns
5.0
2.0
5.0
5.0
kΩ
pF
1998 Jul 08
6
PHILIPS [ NXP SEMICONDUCTORS ]
