74HCT4538D-Q100 [NXP]
HCT SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16, 3.90 MM, PLASTIC, MS-012, SOT109-1, SOP-16;
| 型号： | 74HCT4538D-Q100 |
| 厂家： | 
NXP |
| 描述： | HCT SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16, 3.90 MM, PLASTIC, MS-012, SOT109-1, SOP-16 时钟 光电二极管 逻辑集成电路 |
| 文件： | 总23页 (文件大小：245K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
Rev. 1 — 2 August 2012
Product data sheet
1. General description
The 74HC4538-Q100; 74HCT4538-Q100 are high-speed Si-gate CMOS devices and are
pin compatible with Low-power Schottky TTL (LSTTL). They are specified in compliance
with JEDEC standard no. 7A.
The 74HC4538-Q100; 74HCT4538-Q100 are dual retriggerable-resettable monostable
multivibrators. Each multivibrator has:
• an active LOW trigger/retrigger input (nA)
• an active HIGH trigger/retrigger input (nB)
• an overriding active LOW direct reset input (nCD)
• an output (nQ) and its complement (nQ)
• two pins (nREXT/CEXT and nCEXT) for connecting the external timing components
C
EXT and REXT
Typical pulse width variation over the specified temperature range is 0.2 %.
The multivibrator may be triggered by either the positive or the negative edges of the input
pulse. The duration and accuracy of the output pulse are determined by the external
timing components CEXT and REXT. The output pulse width (tW) is equal to
0.7 REXT CEXT. The linear design techniques guarantee precise control of the output
pulse width. A LOW level at nCD terminates the output pulse immediately. Schmitt trigger
action on pins nA and nB makes the circuit highly tolerant of slower rise and fall times.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
2. Features and benefits
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from 40 C to +85 C and from 40 C to +125 C
Tolerant of slow trigger rise and fall times
Separate reset inputs
Triggering from falling or rising edge
ESD protection:
MIL-STD-883, method 3015 exceeds 2000 V
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 )
Multiple package options
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
3. Ordering information
Table 1.
Ordering information
Type number
Package
Temperature range Name
40 C to +125 C SO16
Description
Version
74HC4538D-Q100
74HCT4538D-Q100
plastic small outline package; 16 leads; body width
3.9 mm
SOT109-1
74HC4538PW-Q100 40 C to +125 C
TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
74HCT4538PW-Q100
4. Functional diagram
2
1
1REXT/CEXT
1CEXT
1Q
1Q
6
7
5
4
1A
1B
3
1CD
2REXT/CEXT
2CEXT
14
15
2Q 10
11 2A
12 2B
2Q
9
13 2CD
001aae727
Fig 1. Functional diagram
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
2 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
nB
nA
V
CC
nREXT/CEXT
nCEXT
enable
V
ref1
GND
nCD
power-on reset
V
ref2
V
CC
enable
nQ
nQ
mba338
GND
Fig 2. Logic diagram (one multivibrator)
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
3 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
5. Pinning information
5.1 Pinning
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ꢀꢈ
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ꢑ
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ꢀ
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ꢀꢌ
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Fig 3. Pin configuration for SO16
Fig 4. Pin configuration for TSSOP16
5.2 Pin description
Table 2.
Pin description
Symbol
Pin
Description
1CEXT, 2CEXT
1, 15
2, 14
3, 13
4, 12
5, 11
6, 10
7, 9
8
external capacitor connection (always connected to ground)
external capacitor/resistor connection
direct reset input (active LOW)
input (LOW to HIGH triggered)
input (HIGH to LOW triggered)
output
1REXT/CEXT, 2REXT/CEXT
1CD, 2CD
1B, 2B
1A, 2A
1Q, 2Q
1Q, 2Q
GND
complementary output (active LOW)
ground (0 V)
VCC
16
supply voltage
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
4 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
6. Functional description
Table 3.
Inputs
nA
Function table
Outputs
nB
nCD
nQ
nQ
L
X
H
H
X
H
L
L
H
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care;
= positive-going transition; = negative-going transition;
= one HIGH level output pulse, with the pule width determined by CEXT and REXT
;
= one LOW level output pulse, with the pulse width determined by CEXT and REXT
.
(1)
(1)
(2)
(1)
nB input
nA input
(3)
(4)
nCD input
nREXT/CEXT input
V
ref2
V
ref2
V
V
ref1
ref1
nQ output
T
(5)
T
T
001aae737
(1) Positive edge triggering.
(2) Positive edge retriggering (pulse lengthening).
(3) Negative edge triggering.
(4) Reset (pulse shortening).
(5) T = 0.7 REXT CEXT (see also Figure 6).
Fig 5. Timing diagram
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
5 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
C
EXT
R
EXT
V
GND
CC
nCEXT
nREXT/CEXT
nQ
T
nA
nB
nQ
T = 0.7 × R
× C
EXT
EXT
nCD
001aak192
Fig 6. Connection of the external timing components REXT and CEXT
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
Min
Max
+7.0
20
20
25
+50
-
Unit
V
VCC
IIK
supply voltage
0.5
[1]
[1]
input clamping current
output clamping current
output current
VI < 0.5 V or VI > VCC + 0.5 V
VO < 0.5 V or VO > VCC + 0.5 V
VO = 0.5 V to VCC + 0.5 V
-
mA
mA
mA
mA
mA
C
IOK
IO
-
-
ICC
IGND
Tstg
Ptot
supply current
-
ground current
50
65
storage temperature
total power dissipation
+150
Tamb = 40 C to +125 C
SO16 package
[2]
[3]
-
-
500
500
mW
mW
TSSOP16 package
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] Ptot derates linearly with 8 mW/K above 70 C.
[3] Ptot derates linearly with 5.5 mW/K above 60 C.
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
6 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter Conditions
74HC4538-Q100
74HCT4538-Q100
Unit
Min
Typ
Max
Min
Typ
Max
VCC
VI
supply voltage
2.0
5.0
6.0
VCC
VCC
+125
625
139
83
4.5
5.0
5.5
VCC
VCC
V
V
V
input voltage
0
-
0
-
VO
output voltage
0
-
0
-
Tamb
t/V
ambient temperature
input transition rise and fall rate VCC = 2.0 V
VCC = 4.5 V
40
-
40
-
+125 C
-
-
-
-
1.67
-
-
-
-
-
1.67
-
-
ns/V
139 ns/V
VCC = 6.0 V
-
ns/V
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 C
40 C to +85 C 40 C to +125 C Unit
Min Typ Max
Min
Max
Min
Max
74HC4538-Q100
VIH
HIGH-level
input voltage
VCC = 2.0 V
1.5
1.2
2.4
3.2
0.8
-
-
1.5
-
-
1.5
-
-
V
V
V
V
V
V
VCC = 4.5 V
3.15
3.15
3.15
VCC = 6.0 V
4.2
-
4.2
-
4.2
-
VIL
LOW-level
input voltage
VCC = 2.0 V
-
-
-
0.5
-
-
-
0.5
1.35
1.8
-
-
-
0.5
1.35
1.8
VCC = 4.5 V
2.1 1.35
VCC = 6.0 V
2.8
1.8
VOH
HIGH-level
VI = VIH or VIL
output voltage
IO = 20 A; VCC = 2.0 V
IO = 20 A; VCC = 4.5 V
IO = 20 A; VCC = 6.0 V
1.9
4.4
5.9
2.0
4.5
6.0
-
-
-
-
-
1.9
4.4
-
-
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
-
-
V
V
V
V
V
5.9
IO = 4.0 mA; VCC = 4.5 V 3.98 4.32
IO = 5.2 mA; VCC = 6.0 V 5.48 5.81
VI = VIH or VIL
3.84
5.34
VOL
LOW-level
output voltage
IO = 20 A; VCC = 2.0 V
IO = 20 A; VCC = 4.5 V
IO = 20 A; VCC = 6.0 V
IO = 4.0 mA; VCC = 4.5 V
IO = 5.2 mA; VCC = 6.0 V
-
-
-
-
-
-
0
0
0
0.1
0.1
0.1
-
-
-
-
-
-
0.1
0.1
-
-
-
-
-
-
0.1
0.1
0.1
0.4
0.4
1
V
V
0.1
V
0.15 0.26
0.16 0.26
0.33
0.33
1
V
V
II
input leakage
current
VI = VCC or GND;
VCC = 6.0 V
-
0.1
A
pin nREXT/CEXT;
VI = 2.0 V or GND; other
inputs at VCC or GND;
VCC = 6.0 V [1]
-
-
0.5
-
5
-
10
A
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
7 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
Table 6.
Static characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 C
40 C to +85 C 40 C to +125 C Unit
Min Typ Max
Min
Max
Min
Max
ICC
CI
supply current VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
-
-
8.0
-
80
-
160
A
input
-
3.5
-
-
-
-
-
pF
capacitance
74HCT4538-Q100
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
2.0
-
1.6
1.2
-
2.0
-
-
2.0
-
-
V
V
VIL
LOW-level
0.8
0.8
0.8
input voltage
VOH
HIGH-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 A
4.4
4.5
-
-
4.4
-
-
4.4
3.7
-
-
V
V
IO = 4.0 mA
3.98 4.32
3.84
VOL
LOW-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 A; VCC = 4.5 V
IO = 4.0 mA; VCC = 4.5 V
-
-
-
0
0.1
-
-
-
0.1
0.33
1
-
-
-
0.1
0.4
1
V
0.15 0.26
V
II
input leakage
current
VI = VCC or GND;
VCC = 5.5 V
-
0.1
A
pin nREXT/CEXT;
VI = 2.0 V or GND; other
inputs at VCC or GND;
VCC = 5.5 V [1]
-
-
0.5
-
5
-
10
A
A
ICC
supply current VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
8.0
-
80
-
160
ICC
additional
VI = VCC 2.1 V; IO = 0 A;
supply current other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V
pin nA, nB
pin nCD
-
-
-
50
65
180
234
-
-
-
-
225
293
-
-
-
-
245
319
-
A
A
pF
CI
input
3.5
capacitance
[1] This measurement can only be carried out after a trigger pulse is applied.
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
8 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
10. Dynamic characteristics
Table 7.
Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.
Symbol Parameter
Conditions
25 C
40 C to
+85 C
40 C to
+125 C
Unit
Min
Typ[1]
Max
Min
Max
Min
Max
74HC4538-Q100
tPLH
tPHL
tt
LOW to HIGH nA, nB to nQ;
propagation
delay
see Figure 7
VCC = 2.0 V
-
-
-
-
85
31
27
25
265
53
-
-
-
-
-
330
66
-
-
-
-
-
400 ns
VCC = 4.5 V
80
-
ns
ns
ns
VCC = 5.0 V; CL = 15 pF
VCC = 6.0 V
45
56
68
nCD to nQ; see Figure 7
VCC = 2.0 V
-
-
-
83
30
24
265
53
-
-
-
340
68
-
-
-
400 ns
VCC = 4.5 V
80
68
ns
ns
VCC = 6.0 V
45
58
HIGH to LOW nA, nB to nQ;
propagation
delay
see Figure 7
VCC = 2.0 V
-
-
-
-
83
30
27
24
265
53
-
-
-
-
-
330
66
-
-
-
-
-
400 ns
V
CC = 4.5 V
80
-
ns
ns
ns
VCC = 5.0 V; CL = 15 pF
VCC = 6.0 V
45
56
68
nCD to nQ; see Figure 7
VCC = 2.0 V
-
-
-
80
29
23
265
53
-
-
-
330
66
-
-
-
400 ns
VCC = 4.5 V
80
68
ns
ns
VCC = 6.0 V
45
56
[2]
transition time nQ and nQ; see Figure 7
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
-
-
-
19
7
75
15
13
-
-
-
95
19
16
-
-
-
119 ns
22
19
ns
ns
6
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
9 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
Table 7.
Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.
Symbol Parameter
Conditions
25 C
40 C to
+85 C
40 C to
+125 C
Unit
Min
Typ[1]
Max
Min
Max
Min
Max
tW
pulse width
nA LOW; see Figure 8
VCC = 2.0 V
80
16
14
17
6
-
-
-
100
20
-
-
-
120
24
-
-
-
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
5
17
20
nB HIGH; see Figure 8
VCC = 2.0 V
80
16
14
17
6
-
-
-
100
20
-
-
-
120
24
-
-
-
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
5
17
20
nCD LOW; see Figure 8
VCC = 2.0 V
80
16
14
19
7
-
-
-
100
20
-
-
-
120
24
-
-
-
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
6
17
20
nQ and nQ HIGH or LOW;
see Figure 8
VCC = 5.0 V;
CEXT = 0.1 F;
REXT = 10 k
630
700
770
602
798
595
805 s
trec
recovery time nCD to nA, nB;
see Figure 8
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
35
7
6
2
2
-
-
-
45
9
-
-
-
55
11
9
-
-
-
ns
ns
ns
6
8
trtrig
retrigger time nA, nB; see Figure 8;
X = CEXT / (4.5 VCC
)
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
-
-
455 + X
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ns
ns
ns
k
k
80 + X
-
-
-
55 + X
-
-
REXT
external
VCC = 2.0 V
VCC = 5.0 V
10
2
-
-
1000
1000
-
-
resistance
CEXT
CPD
external
capacitance
no limits
[3]
power
dissipation
capacitance
per multivibrator;
VI = GND to VCC
-
136
-
-
-
-
-
pF
74HC_HCT4538_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 2 August 2012
10 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
Table 7.
Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.
Symbol Parameter
Conditions
25 C
40 C to
+85 C
40 C to
+125 C
Unit
Min
Typ[1]
Max
Min
Max
Min
Max
74HCT4538-Q100
tPLH
LOW to HIGH nA, nB to nQ;
propagation
delay
see Figure 7
VCC = 4.5 V
-
-
35
30
60
-
-
75
-
90
ns
ns
VCC = 5.0 V; CL = 15 pF
nCD to nQ; see Figure 7
VCC = 4.5 V
-
-
-
-
-
35
60
-
75
-
90
ns
tPHL
HIGH to LOW nA, nB to nQ;
propagation
delay
see Figure 7
VCC = 4.5 V
-
-
35
30
60
-
-
-
75
-
-
-
90
-
ns
ns
VCC = 5.0 V; CL = 15 pF
nCD to nQ; see Figure 7
VCC = 4.5 V
-
35
7
60
15
-
-
75
19
-
-
90
21
-
ns
ns
ns
ns
ns
[2]
tt
transition time nQ and nQ; see Figure 7
VCC = 4.5 V
-
-
-
tW
pulse width
nA LOW; see Figure 8
VCC = 4.5 V
20
16
20
11
5
25
20
25
30
24
30
nB HIGH; see Figure 8
VCC = 4.5 V
-
-
-
nCD LOW; see Figure 8
VCC = 4.5 V
11
-
-
-
nQ and nQ HIGH or LOW;
see Figure 8
VCC = 5.0 V;
CEXT = 0.1 F;
REXT = 10 k
630
700
770
602
798
595
11
805 s
trec
recovery time nCD to nA, nB;
see Figure 8
VCC = 4.5 V
7
2
-
9
-
-
ns
trtrig
retrigger time nA, nB; see Figure 8;
X = CEXT / (4.5 VCC
)
VCC = 4.5 V
-
80 + X
-
-
-
-
-
-
-
-
-
-
ns
REXT
CEXT
external
resistance
VCC = 5.0 V
2
1000
k
external
VCC = 5.0 V
no limits
capacitance
74HC_HCT4538_Q100
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Product data sheet
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74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
Table 7.
Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9.
Symbol Parameter
Conditions
25 C
40 C to
+85 C
40 C to
+125 C
Unit
Min
Typ[1]
Max
Min
Max
Min
Max
[3]
CPD
power
per multivibrator;
-
138
-
-
-
-
-
pF
dissipation
capacitance
VI = GND to (VCC 1.5 V)
[1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2] tt is the same as tTHL and tTLH
[3] PD is used to determine the dynamic power dissipation (PD in W).
.
C
PD = CPD VCC2 fi (CL VCC2 fo) + 0.48 CEXT VCC2 fo + D 0.8 VCC where:
fi = input frequency in MHz;
fo = output frequency in MHz;
(CL VCC2 fo) = sum of the outputs;
CL = output load capacitance in pF;
VCC = supply voltage in V;
D = duty cycle factor in %;
CEXT = external timing capacitance in pF.
11. Waveforms
V
I
nB input
GND
V
M
t
W
V
I
nA input
GND
V
M
t
W
V
I
nCD input
GND
V
M
t
t
t
PHL
PLH
PLH
PHL
V
OH
V
Y
nQ output
V
V
M
M
V
X
V
OL
t
t
t
t
t
PLH
PHL
THL
TLH
V
OH
V
Y
nQ output
V
M
V
X
V
OL
001aak194
Measurement points are given in Table 8.
Logic levels: VOL and VOH are typical output levels that occur with the output load.
Fig 7. Waveforms showing propagation delays and transition times
74HC_HCT4538_Q100
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Product data sheet
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74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
V
I
nCD input
GND
V
M
t
W
t
t
W
rec
V
I
nA input
GND
V
M
t
W
V
I
nB input
GND
V
M
t
rtrig
V
OH
nQ, nQ output
V
M
V
OL
t
W
001aak195
Measurement points are given in Table 8.
Logic levels: VOL and VOH are typical output levels that occur with the output load.
Fig 8. Waveforms showing nA, nB, nQ, nQ pulse widths, recovery and retrigger times
Table 8.
Type
Measurement points
Input
VM
Output
VM
VX
VY
74HC4538-Q100
74HCT4538-Q100
0.5VCC
1.3 V
0.5VCC
1.3 V
0.1VCC
0.1VCC
0.9VCC
0.9VCC
74HC_HCT4538_Q100
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Product data sheet
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74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
t
W
V
I
90 %
negative
pulse
V
V
V
M
M
10 %
0 V
t
t
r
f
t
t
f
r
V
I
90 %
positive
pulse
V
M
M
10 %
0 V
t
W
V
CC
V
CC
V
V
O
I
R
L
S1
G
open
DUT
R
T
C
L
001aad983
Test data is given in Table 9.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch
Fig 9. Test circuit for measuring switching times
Table 9.
Type
Test data
Input
VI
Load
S1 position
tPHL, tPLH
open
tr, tf
6 ns
6 ns
CL
RL
74HC4538-Q100
74HCT4538-Q100
VCC
3 V
15 pF, 50 pF
15 pF, 50 pF
1 k
1 k
open
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
14 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
12. Application information
12.1 Power-down considerations
A large capacitor (CEXT) may cause problems when powering-down the monostable due
to energy stored in this capacitor. When a system containing this device is powered-down
or rapid decrease of VCC to zero occurs, the monostable may sustain damage, due to the
capacitor discharging through the input protection diodes. To avoid this possibility, use a
damping diode (DEXT) preferably a germanium or Schottky type diode able to withstand
large current surges and connect as shown in Figure 10
D
R
EXT
C
EXT
EXT
V
GND
CC
nCEXT
nREXT/CEXT
001aak193
Fig 10. Power-down protection circuit
12.2 Graphs
001aak196
1.6
1.12
R
1 kΩ
2 kΩ
normalized
K factor
(K)
×
EXT
5.6 kΩ
51 kΩ
1 MΩ
C
EXT
(t
)
W
1.2
1.0
0.8
0.6
0.84
0.70
0.56
0.42
−10
−9
−8
−7
−6
−5
−4
10
10
10
10
10
10
10
C
EXT
(F)
VCC = 4.5 V; Tamb = 25 C.
Fig 11. Typical pulse width accuracy versus external capacitance
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
15 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
001aak197
1.6
1.12
normalized
K factor
(K)
R
C
(t
×
EXT
EXT
)
W
1.2
1.0
0.8
0.6
0.84
0.70
0.56
0.42
1 nF
> 100 nF
3
4
5
6
10
10
10
10
R
EXT
(Ω)
VCC = 4.5 V; Tamb = 25 C.
Fig 12. Typical pulse width accuracy versus external resistance
001aak198
1.6
1.12
R
normalized
K factor
(K)
×
EXT
C
EXT
(t
)
W
1.2
1.0
0.8
0.6
0.84
0.70
0.56
0.42
+10 %
R
EXT
−10 %
−10
−9
−8
−7
−6
−5
−4
10
10
10
10
10
10
10
C
EXT
(F)
VCC = 4.5 V; REXT = 10 k; Tamb = 25 C.
Fig 13. Typical pulse width accuracy versus external capacitance
001aak199
1.7
1.19
R
2 kΩ
1 kΩ
normalized
K factor
(K)
×
EXT
C
EXT
(t
)
5.6 kΩ
W
1.3
1.1
0.9
0.7
0.91
10 kΩ
1 MΩ
0.77
0.63
0.49
1
2
3
4
5
6
V
(V)
CC
CEXT = 1 nF; Tamb = 25 C.
Fig 14. Typical pulse width accuracy versus power supply
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
16 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
001aak200
1.7
1.19
normalized
K factor
(K)
R
C
(t
×
EXT
EXT
)
W
1 kΩ
2 kΩ
5.6 kΩ
1 MΩ
1.3
1.1
0.9
0.91
0.77
0.63
0.49
0.7
1
2
3
4
5
6
V
(V)
CC
CEXT = 100 nF; Tamb = 25 C.
Fig 15. Typical pulse width accuracy versus power supply
001aak201
1.7
1.19
R
1 kΩ
normalized
K factor
(K)
×
EXT
C
EXT
(t
)
W
2 kΩ
1.3
1.1
0.9
0.7
0.91
5.6 kΩ
1 MΩ 0.77
0.63
0.49
150
−50
0
50
100
T
(°C)
amb
VCC = 4.5 V; CEXT = 1 nF; Tamb = 25 C.
Fig 16. Typical pulse width accuracy versus temperature
001aak202
1.7
1.19
R
normalized
K factor
(K)
×
EXT
C
EXT
(t
)
W
1.3
1.1
0.9
0.7
0.91
0.77
0.63
0.49
1 kΩ
2 kΩ
5.6 kΩ
1 MΩ
−50
0
50
100
150
T
(°C)
amb
VCC = 4.5 V; CEXT = 1 F; Tamb = 25 C.
Fig 17. Typical pulse width accuracy versus temperature
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
17 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
13. Package outline
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
D
E
A
X
v
c
y
H
M
A
E
Z
16
9
Q
A
2
A
(A )
3
A
1
pin 1 index
θ
L
p
L
1
8
e
w
M
detail X
b
p
0
2.5
scale
5 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
(1)
(1)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
p
Q
v
w
y
Z
θ
1
2
3
p
E
max.
0.25
0.10
1.45
1.25
0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8
6.2
5.8
1.0
0.4
0.7
0.6
0.7
0.3
mm
1.27
0.05
1.05
0.041
1.75
0.25
0.01
0.25
0.01
0.25
0.1
8o
0o
0.010 0.057
0.004 0.049
0.019 0.0100 0.39
0.014 0.0075 0.38
0.16
0.15
0.244
0.228
0.039 0.028
0.016 0.020
0.028
0.012
inches
0.069
0.01 0.004
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-19
SOT109-1
076E07
MS-012
Fig 18. Package outline SOT109-1 (SO16)
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
18 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
D
E
A
X
c
y
H
v
M
A
E
Z
9
16
Q
(A )
3
A
2
A
A
1
pin 1 index
θ
L
p
L
1
8
detail X
w
M
b
p
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
A
(1)
(2)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
Q
v
w
y
Z
θ
1
2
3
p
E
p
max.
8o
0o
0.15
0.05
0.95
0.80
0.30
0.19
0.2
0.1
5.1
4.9
4.5
4.3
6.6
6.2
0.75
0.50
0.4
0.3
0.40
0.06
mm
1.1
0.65
0.25
1
0.2
0.13
0.1
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-18
SOT403-1
MO-153
Fig 19. Package outline SOT403-1 (TSSOP16)
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
19 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
14. Abbreviations
Table 10. Abbreviations
Acronym
CMOS
DUT
Description
Complementary Metal-Oxide Semiconductor
Device Under Test
ESD
ElectroStatic Discharge
Human Body Model
HBM
LSTTL
MM
Low-power Schottky Transistor-Transistor Logic
Machine Model
TTL
Transistor-Transistor Logic
Military
MIL
15. Revision history
Table 11. Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
74HC_HCT4538_Q100 v.1 20120802
Product data sheet
-
74HC_HCT4538_CNV_2
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
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74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
16. Legal information
16.1 Data sheet status
Document status[1][2]
Product status[3]
Development
Definition
Objective [short] data sheet
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Preliminary [short] data sheet Qualification
Product [short] data sheet Production
[1]
[2]
[3]
Please consult the most recently issued document before initiating or completing a design.
The term ‘short data sheet’ is explained in section “Definitions”.
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
Suitability for use in automotive applications — This NXP
16.2 Definitions
Semiconductors product has been qualified for use in automotive
applications. Unless otherwise agreed in writing, the product is not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer's own
risk.
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
16.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
21 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
16.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
17. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
74HC_HCT4538_Q100
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Product data sheet
Rev. 1 — 2 August 2012
22 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
18. Contents
1
2
3
4
General description. . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5
5.1
5.2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
6
Functional description . . . . . . . . . . . . . . . . . . . 5
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended operating conditions. . . . . . . . 7
Static characteristics. . . . . . . . . . . . . . . . . . . . . 7
Dynamic characteristics . . . . . . . . . . . . . . . . . . 9
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
8
9
10
11
12
12.1
12.2
Application information. . . . . . . . . . . . . . . . . . 15
Power-down considerations . . . . . . . . . . . . . . 15
Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13
14
15
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 18
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 20
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 20
16
Legal information. . . . . . . . . . . . . . . . . . . . . . . 21
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 21
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
16.1
16.2
16.3
16.4
17
18
Contact information. . . . . . . . . . . . . . . . . . . . . 22
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2012.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 2 August 2012
Document identifier: 74HC_HCT4538_Q100
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