Data Sheet

74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
Rev. 2 — 23 December 2015
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
CEXT 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
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
3. Ordering information
Table 1.
Ordering information
Type number
74HC4538D-Q100
Package
Temperature range
Name
Description
Version
40 C to +125 C
SO16
plastic small outline package; 16 leads; body width
3.9 mm
SOT109-1
40 C to +125 C
TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
74HCT4538D-Q100
74HC4538PW-Q100
74HCT4538PW-Q100
4. Functional diagram
2
1REXT/CEXT
1
1CEXT
5
1A
4
1B
3
6
1Q
7
2Q
10
2Q
9
1CD
14
2REXT/CEXT
15
2CEXT
11
2A
12
2B
13
1Q
2CD
001aae727
Fig 1.
Functional diagram
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
2 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
nB
nA
VCC
nREXT/CEXT
Vref1
enable
nCEXT
GND
nCD
power-on reset
VCC
Vref2
enable
nQ
nQ
mba338
GND
Fig 2.
Logic diagram (one multivibrator)
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
3 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
5. Pinning information
5.1 Pinning
+&4
+&74
&(;7
9&&
5(;7&(;7
&(;7
&'
5(;7&(;7
%
+&4
+&74
&'
&(;7
9&&
5(;7&(;7
&(;7
&'
5(;7&(;7
$
%
%
&'
4
$
$
%
4
$
4
4
*1'
4
*1'
4
4
DDD
Fig 3.
4
DDD
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
external capacitor connection (always connected to ground)
1REXT/CEXT, 2REXT/CEXT
2, 14
external capacitor/resistor connection
1CD, 2CD
3, 13
direct reset input (active LOW)
1B, 2B
4, 12
input (LOW to HIGH triggered)
1A, 2A
5, 11
input (HIGH to LOW triggered)
1Q, 2Q
6, 10
output
1Q, 2Q
7, 9
complementary output (active LOW)
GND
8
ground (0 V)
VCC
16
supply voltage
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
4 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
6. Functional description
Table 3.
Function table
Inputs
Outputs
nA
nB
nCD

L
H
H

H
X
X
L
[1]
nQ
nQ
L
H
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
(3)
nA input
(4)
nCD input
nREXT/CEXT input
Vref2
Vref1
Vref1
Vref2
nQ output
T
T
(5)
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
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
5 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
CEXT
REXT
VCC
GND
nCEXT
nREXT/CEXT
nA
nB
nQ
T
nQ
T = 0.7 × REXT × CEXT
nCD
Fig 6.
001aak192
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
VCC
supply voltage
Conditions
Min
Max
Unit
0.5
+7.0
V
-
20
mA
-
20
mA
-
25
mA
input clamping current
VI < 0.5 V or VI > VCC + 0.5 V
[1]
IOK
output clamping current
VO < 0.5 V or VO > VCC + 0.5 V
[1]
IO
output current
VO = 0.5 V to VCC + 0.5 V
ICC
supply current
-
+50
mA
IGND
ground current
50
-
mA
Tstg
storage temperature
65
+150
C
Ptot
total power dissipation
IIK
Tamb = 40 C to +125 C
SO16 package
[2]
-
500
mW
TSSOP16 package
[3]
-
500
mW
[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
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
6 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
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
2.0
5.0
6.0
4.5
5.0
5.5
V
input voltage
0
-
VCC
0
-
VCC
V
output voltage
0
-
VCC
0
-
VCC
V
VCC
supply voltage
VI
VO
Tamb
ambient temperature
t/V
input transition rise and fall rate
40
-
+125
40
-
+125
VCC = 2.0 V
-
-
625
-
-
-
ns/V
C
VCC = 4.5 V
-
1.67
139
-
1.67
139
ns/V
VCC = 6.0 V
-
-
83
-
-
-
ns/V
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ
Max
Min
Max
Min
Max
VCC = 2.0 V
1.5
1.2
-
1.5
-
1.5
-
V
74HC4538-Q100
VIH
VIL
VOH
VOL
II
HIGH-level
input voltage
LOW-level
input voltage
HIGH-level
output voltage
LOW-level
output voltage
input leakage
current
74HC_HCT4538_Q100
Product data sheet
VCC = 4.5 V
3.15
2.4
-
3.15
-
3.15
-
V
VCC = 6.0 V
4.2
3.2
-
4.2
-
4.2
-
V
VCC = 2.0 V
-
0.8
0.5
-
0.5
-
0.5
V
VCC = 4.5 V
-
2.1
1.35
-
1.35
-
1.35
V
VCC = 6.0 V
-
2.8
1.8
-
1.8
-
1.8
V
IO = 20 A; VCC = 2.0 V
1.9
2.0
-
1.9
-
1.9
-
V
IO = 20 A; VCC = 4.5 V
4.4
4.5
-
4.4
-
4.4
-
V
VI = VIH or VIL
IO = 20 A; VCC = 6.0 V
5.9
6.0
-
5.9
-
5.9
-
V
IO = 4.0 mA; VCC = 4.5 V
3.98
4.32
-
3.84
-
3.7
-
V
IO = 5.2 mA; VCC = 6.0 V
5.48
5.81
-
5.34
-
5.2
-
V
IO = 20 A; VCC = 2.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 20 A; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
IO = 20 A; VCC = 6.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 4.0 mA; VCC = 4.5 V
-
0.15
0.26
-
0.33
-
0.4
V
IO = 5.2 mA; VCC = 6.0 V
VI = VIH or VIL
-
0.16
0.26
-
0.33
-
0.4
V
VI = VCC or GND;
VCC = 6.0 V
-
-
0.1
-
1
-
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
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
7 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
Table 6.
Static characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
ICC
supply current
CI
input
capacitance
25 C
Conditions
VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
40 C to +85 C 40 C to +125 C Unit
Min
Typ
Max
Min
Max
Min
Max
-
-
8.0
-
80
-
160
A
-
3.5
-
-
-
-
-
pF
74HCT4538-Q100
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
2.0
1.6
-
2.0
-
2.0
-
V
VIL
LOW-level
input voltage
VCC = 4.5 V to 5.5 V
-
1.2
0.8
-
0.8
-
0.8
V
VOH
HIGH-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 A
4.4
4.5
-
4.4
-
4.4
-
V
IO = 4.0 mA
3.98
4.32
-
3.84
-
3.7
-
V
IO = 20 A; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
IO = 4.0 mA; VCC = 4.5 V
-
0.15
0.26
-
0.33
-
0.4
V
VI = VCC or GND;
VCC = 5.5 V
-
-
0.1
-
1
-
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
-
-
8.0
-
80
-
160
A
pin nA, nB
-
50
180
-
225
-
245
A
pin nCD
-
65
234
-
293
-
319
A
-
3.5
-
-
-
-
-
pF
LOW-level
output voltage
VOL
input leakage
current
II
VI = VIH or VIL; VCC = 4.5 V
ICC
supply current
VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
ICC
additional
supply current
VI = VCC  2.1 V; IO = 0 A;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V
CI
[1]
input
capacitance
This measurement can only be carried out after a trigger pulse is applied.
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
8 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
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
25 C
Conditions
40 C to
+85 C
40 C to
+125 C
Unit
Min
Typ[1]
Max
Min
Max
Min
Max
VCC = 2.0 V
-
85
265
-
330
-
400
ns
VCC = 4.5 V
-
31
53
-
66
-
80
ns
VCC = 5.0 V; CL = 15 pF
-
27
-
-
-
-
-
ns
VCC = 6.0 V
-
25
45
-
56
-
68
ns
VCC = 2.0 V
-
83
265
-
340
-
400
ns
VCC = 4.5 V
-
30
53
-
68
-
80
ns
VCC = 6.0 V
-
24
45
-
58
-
68
ns
-
83
265
-
330
-
400
ns
74HC4538-Q100
tPLH
LOW to HIGH
propagation
delay
nA, nB to nQ;
see Figure 7
nCD to nQ; see Figure 7
tPHL
HIGH to LOW
propagation
delay
nA, nB to nQ;
see Figure 7
VCC = 2.0 V
VCC = 4.5 V
-
30
53
-
66
-
80
ns
VCC = 5.0 V; CL = 15 pF
-
27
-
-
-
-
-
ns
VCC = 6.0 V
-
24
45
-
56
-
68
ns
VCC = 2.0 V
-
80
265
-
330
-
400
ns
VCC = 4.5 V
-
29
53
-
66
-
80
ns
-
23
45
-
56
-
68
ns
nCD to nQ; see Figure 7
VCC = 6.0 V
tt
transition time
74HC_HCT4538_Q100
Product data sheet
nQ and nQ; see Figure 7
[2]
VCC = 2.0 V
-
19
75
-
95
-
119
ns
VCC = 4.5 V
-
7
15
-
19
-
22
ns
VCC = 6.0 V
-
6
13
-
16
-
19
ns
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
9 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
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
tW
pulse width
25 C
Conditions
40 C to
+85 C
40 C to
+125 C
Unit
Min
Typ[1]
Max
Min
Max
Min
Max
VCC = 2.0 V
80
17
-
100
-
120
-
ns
VCC = 4.5 V
16
6
-
20
-
24
-
ns
VCC = 6.0 V
14
5
-
17
-
20
-
ns
VCC = 2.0 V
80
17
-
100
-
120
-
ns
VCC = 4.5 V
16
6
-
20
-
24
-
ns
VCC = 6.0 V
14
5
-
17
-
20
-
ns
VCC = 2.0 V
80
19
-
100
-
120
-
ns
VCC = 4.5 V
16
7
-
20
-
24
-
ns
VCC = 6.0 V
14
6
-
17
-
20
-
ns
630
700
770
602
798
595
805
s
nA LOW; see Figure 8
nB HIGH; see Figure 8
nCD LOW; see Figure 8
nQ and nQ HIGH or LOW;
see Figure 8
VCC = 5.0 V;
CEXT = 0.1 F;
REXT = 10 k
trec
trtrig
REXT
recovery time
retrigger time
external
resistance
CEXT
external
capacitance
CPD
power
dissipation
capacitance
74HC_HCT4538_Q100
Product data sheet
nCD to nA, nB;
see Figure 8
VCC = 2.0 V
35
6
-
45
-
55
-
ns
VCC = 4.5 V
7
2
-
9
-
11
-
ns
VCC = 6.0 V
6
2
-
8
-
9
-
ns
VCC = 2.0 V
-
455 + X
-
-
-
-
-
ns
VCC = 4.5 V
-
80 + X
-
-
-
-
-
ns
VCC = 6.0 V
-
55 + X
-
-
-
-
-
ns
VCC = 2.0 V
10
-
1000
-
-
-
-
k
VCC = 5.0 V
2
-
1000
-
-
-
-
k
-
-
-
pF
nA, nB; see Figure 8;
X = CEXT / (4.5  VCC)
no limits
per multivibrator;
VI = GND to VCC
[3]
-
136
-
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
-
© NXP Semiconductors N.V. 2015. All rights reserved.
10 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
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
25 C
Conditions
Min
40 C to
+85 C
Typ[1]
Max
40 C to
+125 C
Min
Max
Min
Max
Unit
74HCT4538-Q100
tPLH
LOW to HIGH
propagation
delay
nA, nB to nQ;
see Figure 7
VCC = 4.5 V
-
35
60
-
75
-
90
ns
VCC = 5.0 V; CL = 15 pF
-
30
-
-
-
-
-
ns
-
35
60
-
75
-
90
ns
VCC = 4.5 V
-
35
60
-
75
-
90
ns
VCC = 5.0 V; CL = 15 pF
-
30
-
-
-
-
-
ns
-
35
60
-
75
-
90
ns
-
7
15
-
19
-
21
ns
20
11
-
25
-
30
-
ns
16
5
-
20
-
24
-
ns
20
11
-
25
-
30
-
ns
630
700
770
602
798
595
805
s
7
2
-
9
-
11
-
ns
nCD to nQ; see Figure 7
VCC = 4.5 V
tPHL
HIGH to LOW
propagation
delay
nA, nB to nQ;
see Figure 7
nCD to nQ; see Figure 7
VCC = 4.5 V
tt
transition time
nQ and nQ; see Figure 7
VCC = 4.5 V
tW
pulse width
[2]
nA LOW; see Figure 8
VCC = 4.5 V
nB HIGH; see Figure 8
VCC = 4.5 V
nCD LOW; see Figure 8
VCC = 4.5 V
nQ and nQ HIGH or LOW;
see Figure 8
VCC = 5.0 V;
CEXT = 0.1 F;
REXT = 10 k
trec
recovery time
nCD to nA, nB;
see Figure 8
VCC = 4.5 V
trtrig
retrigger time
VCC = 4.5 V
-
80 + X
-
-
-
-
-
ns
REXT
external
resistance
VCC = 5.0 V
2
-
1000
-
-
-
-
k
CEXT
external
capacitance
VCC = 5.0 V
74HC_HCT4538_Q100
Product data sheet
nA, nB; see Figure 8;
X = CEXT / (4.5  VCC)
no limits
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
11 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
CPD
[1]
25 C
Conditions
power
dissipation
capacitance
per multivibrator;
VI = GND to (VCC  1.5 V)
[3]
40 C to
+85 C
40 C to
+125 C
Min
Typ[1]
Max
Min
Max
Min
Max
-
138
-
-
-
-
-
Unit
pF
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]
CPD is used to determine the dynamic power dissipation (PD in W).
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
VI
nB input
GND
VM
tW
VI
nA input
VM
GND
tW
VI
nCD input
GND
VM
tPLH
VOH
nQ output
VM
VOL
tPHL
tPLH
VY
VX
tTHL
tPHL
VM
tPHL
tTLH
VOH
nQ output
tPLH
VY
VM
VX
VOL
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
Product data sheet
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Rev. 2 — 23 December 2015
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12 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
VI
nCD input
VM
GND
trec
tW
tW
VI
nA input
VM
GND
tW
VI
nB input
VM
GND
trtrig
VOH
VM
nQ, nQ output
VOL
tW
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.
Table 8.
Waveforms showing nA, nB, nQ, nQ pulse widths, recovery and retrigger times
Measurement points
Type
Input
Output
VM
VM
VX
VY
74HC4538-Q100
0.5VCC
0.5VCC
0.1VCC
0.9VCC
74HCT4538-Q100
1.3 V
1.3 V
0.1VCC
0.9VCC
74HC_HCT4538_Q100
Product data sheet
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Rev. 2 — 23 December 2015
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13 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
VI
tW
90 %
negative
pulse
VM
0V
tf
tr
tr
tf
VI
90 %
positive
pulse
0V
VM
10 %
VM
VM
10 %
tW
VCC
VCC
G
VI
VO
RL
S1
open
DUT
CL
RT
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.
Table 9.
Test circuit for measuring switching times
Test data
Type
Input
VI
Load
tr, tf
CL
S1 position
RL
tPHL, tPLH
74HC4538-Q100
VCC
6 ns
15 pF, 50 pF
1 k
open
74HCT4538-Q100
3V
6 ns
15 pF, 50 pF
1 k
open
74HC_HCT4538_Q100
Product data sheet
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Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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
DEXT
CEXT
REXT
VCC
GND
nCEXT
nREXT/CEXT
001aak193
Fig 10. Power-down protection circuit
12.2 Graphs
001aak196
1.6
1 kΩ
2 kΩ
5.6 kΩ
51 kΩ
1 MΩ
normalized
K factor
(K)
1.12
REXT ×
CEXT
(tW)
1.2
0.84
1.0
0.70
0.8
0.56
0.6
10−10
10−9
10−8
10−7
10−6
0.42
10−4
10−5
CEXT (F)
VCC = 4.5 V; Tamb = 25 C.
Fig 11. Typical pulse width accuracy versus external capacitance
74HC_HCT4538_Q100
Product data sheet
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Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
15 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
001aak197
1.6
1.12
REXT ×
CEXT
(tW)
normalized
K factor
(K)
1.2
0.84
1 nF
1.0
0.70
> 100 nF
0.8
0.56
0.6
103
104
0.42
106
105
REXT (Ω)
VCC = 4.5 V; Tamb = 25 C.
Fig 12. Typical pulse width accuracy versus external resistance
001aak198
1.6
1.12
REXT ×
CEXT
(tW)
normalized
K factor
(K)
0.84
1.2
+10 %
REXT
1.0
0.70
−10 %
0.56
0.8
0.6
10−10
10−9
10−8
10−7
10−6
0.42
10−4
10−5
CEXT (F)
VCC = 4.5 V; REXT = 10 k; Tamb = 25 C.
Fig 13. Typical pulse width accuracy versus external capacitance
001aak199
1.7
normalized
K factor
(K)
2 kΩ
1 kΩ
1.19
REXT ×
CEXT
(tW)
5.6 kΩ
1.3
0.91
10 kΩ
1.1
0.77
1 MΩ
0.9
0.63
0.7
0.49
1
2
3
4
5
6
VCC (V)
CEXT = 1 nF; Tamb = 25 C.
Fig 14. Typical pulse width accuracy versus power supply
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
16 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
001aak200
1.7
1.19
REXT ×
CEXT
(tW)
normalized
K factor
(K)
1 kΩ
1.3
0.91
2 kΩ
5.6 kΩ
1 MΩ
1.1
0.77
0.9
0.63
0.7
0.49
1
2
3
4
5
6
VCC (V)
CEXT = 100 nF; Tamb = 25 C.
Fig 15. Typical pulse width accuracy versus power supply
001aak201
1.7
REXT ×
CEXT
(tW)
1 kΩ
normalized
K factor
(K)
2 kΩ
1.3
1.19
0.91
5.6 kΩ
1.1
0.77
1 MΩ
0.9
0.7
−50
0.63
0
50
0.49
150
100
Tamb (°C)
VCC = 4.5 V; CEXT = 1 nF; Tamb = 25 C.
Fig 16. Typical pulse width accuracy versus temperature
001aak202
1.7
1.19
REXT ×
CEXT
(tW)
normalized
K factor
(K)
1.3
0.91
1.1
0.77
1 kΩ
2 kΩ
5.6 kΩ
1 MΩ
0.9
0.7
−50
0
50
0.63
0.49
150
100
Tamb (°C)
VCC = 4.5 V; CEXT = 1 F; Tamb = 25 C.
Fig 17. Typical pulse width accuracy versus temperature
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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
c
y
HE
v M A
Z
16
9
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
8
e
0
detail X
w M
bp
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
0.01
0.019 0.0100 0.39
0.014 0.0075 0.38
0.039
0.016
0.028
0.020
inches
0.010 0.057
0.069
0.004 0.049
0.16
0.15
0.05
0.244
0.041
0.228
0.01
0.01
0.028
0.004
0.012
θ
8o
o
0
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT109-1
076E07
MS-012
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
Fig 18. Package outline SOT109-1 (SO16)
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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
E
D
A
X
c
y
HE
v M A
Z
9
16
Q
(A 3)
A2
A
A1
pin 1 index
θ
Lp
L
1
8
e
detail X
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
5.1
4.9
4.5
4.3
0.65
6.6
6.2
1
0.75
0.50
0.4
0.3
0.2
0.13
0.1
0.40
0.06
8o
o
0
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.
OUTLINE
VERSION
SOT403-1
REFERENCES
IEC
JEDEC
JEITA
MO-153
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
Fig 19. Package outline SOT403-1 (TSSOP16)
74HC_HCT4538_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
19 of 23
74HC4538-Q100; 74HCT4538-Q100
NXP Semiconductors
Dual retriggerable precision monostable multivibrator
14. Abbreviations
Table 10.
Abbreviations
Acronym
Description
CMOS
Complementary Metal-Oxide Semiconductor
DUT
Device Under Test
ESD
ElectroStatic Discharge
HBM
Human Body Model
LSTTL
Low-power Schottky Transistor-Transistor Logic
MM
Machine Model
TTL
Transistor-Transistor Logic
MIL
Military
15. Revision history
Table 11.
Revision history
Document ID
Release date
74HC_HCT4538_Q100 v.2 20151223
Modifications:
•
Product data sheet
Change notice Supersedes
Product data sheet
-
74HC_HCT4538_Q100 v.1
-
-
CPD formula corrected (errata).
74HC_HCT4538_Q100 v.1 20120802
74HC_HCT4538_Q100
Data sheet status
Product data sheet
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Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
20 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
16. Legal information
16.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
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.
16.2 Definitions
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.
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.
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.
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.
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
Product data sheet
Suitability for use — NXP Semiconductors products are 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.
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.
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.
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.
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.
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.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 23 December 2015
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21 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
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.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors’ warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors’ specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
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.
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
Product data sheet
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Rev. 2 — 23 December 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
22 of 23
NXP Semiconductors
74HC4538-Q100; 74HCT4538-Q100
Dual retriggerable precision monostable multivibrator
18. Contents
1
2
3
4
5
5.1
5.2
6
7
8
9
10
11
12
12.1
12.2
13
14
15
16
16.1
16.2
16.3
16.4
17
18
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
Functional description . . . . . . . . . . . . . . . . . . . 5
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended operating conditions. . . . . . . . 7
Static characteristics. . . . . . . . . . . . . . . . . . . . . 7
Dynamic characteristics . . . . . . . . . . . . . . . . . . 9
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Application information. . . . . . . . . . . . . . . . . . 15
Power-down considerations . . . . . . . . . . . . . . 15
Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 18
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 20
Legal information. . . . . . . . . . . . . . . . . . . . . . . 21
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 21
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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 Semiconductors N.V. 2015.
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: 23 December 2015
Document identifier: 74HC_HCT4538_Q100