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74HCT4538N,112
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
74HC_HCT4538_3
© NXP B.V
. 2009. All rights reserved.
Product data sheet
Rev
. 03 — 8 June 2009
16 of 24
NXP Semiconductors
74HC4538; 74HCT4538
Dual retriggerable precision monostable m
ultivibrator
V
CC
= 4.5 V
; T
amb
= 25
°
C.
Fig 12.
T
ypical pulse width accurac
y versus external resistance
R
EXT
(
Ω
)
10
3
10
6
10
5
10
4
001aak197
1.0
1.2
0.8
1.6
0.6
0.70
0.84
0.56
1.12
0.42
R
EXT
×
C
EXT
(t
W
)
normalized
K factor
(K)
> 100 nF
1 nF
V
CC
= 4.5 V
; R
EXT
= 10 k
Ω
; T
amb
= 25
°
C.
Fig 13.
T
ypical pulse width accurac
y versus external capacitance
001aak198
C
EXT
(F)
10
−
10
10
−
5
10
−
4
10
−
6
10
−
7
10
−
9
10
−
8
1.0
1.2
0.8
1.6
0.6
normalized
K factor
(K)
0.70
0.84
0.56
1.12
0.42
R
EXT
×
C
EXT
(t
W
)
R
EXT
+10 %
−
10 %
C
EXT
= 1 nF; T
amb
= 25
°
C.
Fig 14.
T
ypical pulse width accurac
y versus power suppl
y
V
CC
(V)
1
56
4
23
001aak199
0.77
0.91
0.63
1.19
0.49
R
EXT
×
C
EXT
(t
W
)
1.1
1.3
0.9
1.7
0.7
normalized
K factor
(K)
5.6 k
Ω
2 k
Ω
1 k
Ω
10 k
Ω
1 M
Ω
74HC_HCT4538_3
© NXP B.V
. 2009. All rights reserved.
Product data sheet
Rev
. 03 — 8 June 2009
17 of 24
NXP Semiconductors
74HC4538; 74HCT4538
Dual retriggerable precision monostable m
ultivibrator
C
EXT
= 100 nF; T
amb
= 25
°
C.
Fig 15.
T
ypical pulse width accurac
y versus power suppl
y
V
CC
(V)
1
56
4
23
001aak200
0.77
0.91
0.63
1.19
0.49
R
EXT
×
C
EXT
(t
W
)
1.1
1.3
0.9
1.7
0.7
normalized
K factor
(K)
5.6 k
Ω
2 k
Ω
1 k
Ω
1 M
Ω
V
CC
= 4.5 V
; C
EXT
= 1 nF; T
amb
= 25
°
C.
Fig 16.
T
ypical pulse width accurac
y versus temperature
T
amb
(
°
C)
−
50
100
150
50
0
001aak201
0.77
0.91
0.63
1.19
0.49
R
EXT
×
C
EXT
(t
W
)
1.1
1.3
0.9
1.7
0.7
normalized
K factor
(K)
5.6 k
Ω
2 k
Ω
1 k
Ω
1 M
Ω
V
CC
= 4.5 V
; C
EXT
= 1
µ
F; T
amb
= 25
°
C.
Fig 17.
T
ypical pulse width accurac
y versus temperature
T
amb
(
°
C)
−
50
100
150
50
0
001aak202
0.77
0.91
0.63
1.19
0.49
R
EXT
×
C
EXT
(t
W
)
1.1
1.3
0.9
1.7
0.7
normalized
K factor
(K)
1 k
Ω
2 k
Ω
5.6 k
Ω
1 M
Ω
74HC_HCT4538_3
© NXP B.V
. 2009. All rights reserved.
Product data sheet
Rev
. 03 — 8 June 2009
18 of 24
NXP Semiconductors
74HC4538; 74HCT4538
Dual retriggerable precision monostable m
ultivibrator
13.
P
ac
ka
ge outline
Fig 18.
Pac
kage outline SO
T38-4 (DIP16)
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
JEITA
SOT38-4
95-01-14
03-02-13
M
H
c
(e )
1
M
E
A
L
seating plane
A
1
w
M
b
1
b
2
e
D
A
2
Z
16
1
9
8
E
pin 1 index
b
0
5
10 mm
scale
Note
1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
UNIT
A
max.
12
b
1
(1)
(1)
(1)
b
2
cD
E
e
M
Z
H
L
mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
min.
A
max.
b
max.
w
M
E
e
1
1.73
1.30
0.53
0.38
0.36
0.23
19.50
18.55
6.48
6.20
3.60
3.05
0.254
2.54
7.62
8.25
7.80
10.0
8.3
0.76
4.2
0.51
3.2
inches
0.068
0.051
0.021
0.015
0.014
0.009
1.25
0.85
0.049
0.033
0.77
0.73
0.26
0.24
0.14
0.12
0.01
0.1
0.3
0.32
0.31
0.39
0.33
0.03
0.17
0.02
0.13
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
74HCT4538N,112
Mfr. #:
Buy 74HCT4538N,112
Manufacturer:
NXP Semiconductors
Description:
Monostable Multivibrator DUAL RETRIG PRECSION
Lifecycle:
New from this manufacturer.
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