Datasheet

September 1993 6
Philips Semiconductors Product specification
Dual retriggerable precision monostable
multivibrator
74HC/HCT4538
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications” .
Output capability: standard
I
CC
category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
OTHER+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PLH
propagation delay
nA
0
,nA
1
to nQ
85
31
25
265
53
45
330
66
56
400
80
68
ns 2.0
4.5
6.0
Fig.8
t
PHL
propagation delay
nA
0
,nA
1
to nQ
83
30
24
265
53
45
330
66
56
400
80
68
ns 2.0
4.5
6.0
Fig.8
t
PHL
propagation delay
nR
D
to nQ
80
29
23
265
53
45
330
66
56
400
80
68
ns 2.0
4.5
6.0
Fig.8
t
PLH
propagation delay
nR
D
to nQ
83
30
24
265
53
45
340
68
58
400
80
68
ns 2.0
4.5
6.0
Fig.8
t
THL
/ t
TLH
output transition
time
19
7
6
75
15
13
95
19
16
110
22
19
ns 2.0
4.5
6.0
Fig.8
t
W
nA
0
pulse width
LOW
80
16
14
17
6
5
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.8
t
W
nA
1
pulse width
HIGH
80
16
14
17
6
5
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.8
t
W
nR
D
pulse width
LOW
80
16
14
19
7
6
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.8
t
W
nQ, nQ pulse width
HIGH or LOW
0.63 0.70 0.77 0.602 0.798 0.595 0.805 ms 5.0 Fig.8;
R
t
= 10 kΩ;
C
t
= 0.1 µF
t
rem
removal time
R
D
to nA
0
,nA
1
35
7
6
6
2
2
45
9
8
55
11
9
ns 2.0
4.5
6.0
Fig.8