74HC423D.653 [NXP]
Dual retriggerable monostable multivibrator with reset; 双可再触发单稳多谐振荡器与重置
| 型号： | 74HC423D.653 |
| 厂家： | 
NXP |
| 描述： | Dual retriggerable monostable multivibrator with reset |
| 文件： | 总24页 (文件大小：295K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74HC423; 74HCT423
Dual retriggerable monostable multivibrator with reset
Rev. 6 — 19 December 2011
Product data sheet
1. General description
74HC423; 74HCT423 are high-speed Si-gate CMOS devices that are pin compatible with
Low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC423; 74HCT423 dual retriggerable monostable multivibrator with reset has two
methods of output pulse width control.
1. The minimum pulse width is essentially determined by the selection of an external
resistor (REXT) and capacitor (CEXT), see Section 12.1.
2. Once triggered, the basic output pulse width may be extended by retriggering the
gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB). By
repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made
as long as desired. When nRD is LOW, it forces the nQ output LOW, the nQ output
HIGH and also inhibits the triggering. Figure 10 and Figure 11 illustrate pulse control
by reset.
The nA and nB inputs’ Schmitt trigger action makes them highly tolerant to slower input
rise and fall times.
The 74HC423; 74HCT423 are identical to the 74HC123; 74HCT123 except that they
cannot be triggered via the reset input.
2. Features and benefits
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output pulse
Schmitt-trigger action on all inputs except for the reset input
Complies with JEDEC standard no. 7A
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Specified from 40 C to +85 C and from 40 C to +125 C
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
3. Ordering information
Table 1.
Type number Package
Temperature range Name
Ordering information
Description
Version
74HC423N
40 C to +125 C
40 C to +125 C
40 C to +125 C
DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-4
74HCT423N
74HC423D
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74HCT423D
74HC423BQ
74HCT423BQ
DHVQFN16 plastic dual in-line compatible thermal enhanced very thin SOT763-1
quad flat package; no leads; 16 terminals;
body 2.5 3.5 0.85 mm
74HCT423DB 40 C to +125 C
74HCT423PW 40 C to +125 C
SSOP16
plastic shrink small outline package; 16 leads;
body width 5.3 mm
SOT338-1
SOT403-1
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
4. Functional diagram
14
1CEXT
15
1REXT/CEXT
S
13
1Q
1Q
Q
Q
1
1A
T
4
2
3
1B
RD
6
7
1RD
2CEXT
2REXT/CEXT
S
5
2Q
2Q
Q
Q
9
2A
T
12
10
11
2B
RD
2RD
001aah796
Fig 1. Functional Diagram
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
2 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
14
CX
15
13
RCX
1
&
1CEXT 14
2CEXT
2
3
4
6
R
1REXT/CEXT 15
2REXT/CEXT
7
S
1Q 13
6
7
CX
Q
Q
2Q
5
1
9
1A
2A
5
RCX
T
9
1Q
4
&
2
1B
10
12
2Q 12
RD
10 2B
11
R
3
1RD
001aah797
11 2RD
001aah798
Fig 2. Logic symbol
Fig 3. IEC Logic symbol
REXT/CEXT
V
CC
Q
Q
RD
R
CL
CL
V
CC
V
CC
R
CL
CL
CL
A
B
001aah799
Fig 4. Logic diagram
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
3 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1 Pinning
74HC423
74HCT423
terminal 1
index area
74HC423
74HCT423
2
3
4
5
6
7
15
14
13
12
11
10
1B
1RD
1REXT/CEXT
1CEXT
1Q
1A
1
2
3
4
5
6
7
8
16 V
CC
1Q
1B
1RD
15 1REXT/CEXT
14 1CEXT
13 1Q
2Q
2Q
1Q
2CEXT
2REXT/CEXT
2RD
2B
(1)
CC
V
2Q
12 2Q
2CEXT
2REXT/CEXT
GND
11 2RD
10 2B
001aah784
9
2A
Transparent top view
001aah785
(1) The die substrate is attached to this pad using a
conductive die attach material. It cannot be used as
supply pin or input
Fig 5. Pin configuration DIP16, SO16 and (T)SSOP16
Fig 6. Pin configuration DHVQFN16
5.2 Pin description
Table 2.
Symbol
1A, 2A
Pin description
Pin
Description
1, 9
2, 10
3, 11
4, 12
8
trigger input (negative edge triggered)
trigger input (positive edge triggered)
direct reset (active LOW)
output (active LOW)
1B, 2B
1RD, 2RD
1Q, 2Q
GND
ground (0 V)
1Q, 2Q
13, 5
14, 6
15, 7
16
output (active HIGH)
1CEXT, 2CEXT
1REXT/CEXT, 2REXT/CEXT
VCC
external capacitor connection
external resistor/capacitor connection
supply voltage
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
4 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
6. Functional description
Table 3.
Function table[1]
Input
nRD
L
Output
nA
X
nB
X
nQ
nQ
H
L
X
H
X
X
L[2]
L[2]
H[2]
H[2]
X
L
H
L
H
H
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
= LOW-to-HIGH transition;
= HIGH-to-LOW transition;
= one HIGH level output pulse;
= one LOW level output pulse.
[2] If the monostable multivibrator was triggered before this condition was established, the pulse will continue as programmed.
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
VCC
IIK
Parameter
Conditions
Min
Max
+7
Unit
V
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
0.5 V < VO < VCC + 0.5 V
-
20
20
25
50
mA
mA
mA
mA
mA
C
IOK
-
IO
-
ICC
supply current
-
IGND
Tstg
Ptot
ground current
50
-
storage temperature
total power dissipation
65
+150
750
500
[2]
[3]
DIP16 package
-
-
mW
mW
SO16, SSOP16, TSSOP16 and
DHVQFN16 packages
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For DIP16 packages: above 70 C the value of Ptot derates linearly at 12 mW/K.
[3] For SO16 packages: above 70 C the value of Ptot derates linearly at 8 mW/K;
For SSOP16 and TSSOP16 packages: above 60 C the value of Ptot derates linearly at 5.5 mW/K;
For DHVQFN16 packages: above 60 C the value of Ptot derates linearly at 4.5 mW/K.
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
5 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
74HC423
74HCT423
Unit
Min
Typ
Max
Min
Typ
Max
VCC
VI
supply voltage
input voltage
2.0
5.0
6.0
4.5
5.0
5.5
V
V
V
0
-
VCC
VCC
+125
0
-
VCC
VCC
VO
output voltage
ambient temperature
0
-
0
-
Tamb
t/V
40
-
40
-
+125 C
input transition rise
and fall rate
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
-
-
-
-
1.67
-
625
139
83
-
-
-
-
1.67
-
-
ns/V
ns/V
ns/V
139
-
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 Unit
+125 C
Min Typ Max Min Max Min Max
74HC423
VIH
HIGH-level
input voltage
VCC = 2.0 V
1.5
1.2
-
-
1.5
-
-
1.5
-
-
V
V
V
V
V
V
VCC = 4.5 V
3.15 2.4
3.15
3.15
VCC = 6.0 V
4.2
3.2
0.8
-
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
IO = 4.0 mA; VCC = 4.5 V
IO = 5.2 mA; VCC = 6.0 V
VI = VIH or VIL
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
3.98 4.32
5.48 5.81
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
VI = VCC or GND; 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
V
V
V
V
V
0.1
0.15 0.26
0.16 0.26
0.33
0.33
1.0
II
input leakage
current
-
0.1
1.0 A
ICC
supply current
VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
-
-
8.0
-
80
-
160 A
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
6 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
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 Unit
+125 C
Min Typ Max Min Max Min Max
CI
input capacitance
-
3.5
-
-
-
-
-
pF
74HCT423
VIH
HIGH-level input VCC = 4.5 V to 5.5 V
voltage
2.0
-
1.6
1.2
-
2.0
-
-
2.0
-
-
V
V
VIL
LOW-level input VCC = 4.5 V to 5.5 V
voltage
0.8
0.8
0.8
VOH
HIGH-level
VI = VIH or VIL; VCC = 4.5 V
output voltage
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 VI = VIH or VIL; VCC = 4.5 V
voltage
IO = 20 A
-
-
-
0
0.1
-
-
-
0.1
-
-
-
0.1
0.4
V
V
IO = 4.0 mA
0.15 0.26
0.33
1.0
II
input leakage
current
VI = VCC or GND; VCC = 5.5 V
-
0.1
1.0 A
ICC
ICC
supply current
VI = VCC or GND; VCC = 5.5 V;
IO = 0 A
-
-
8.0
-
80
-
160 A
additional supply per input pin; VI = VCC 2.1 V;
current
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V; IO = 0 A
nA, nB inputs
nRD input
-
-
-
35
50
126
180
-
-
-
-
158
225
-
-
-
-
172 A
245 A
CI
input capacitance
3.5
-
pF
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
7 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V; test circuit see Figure 12.
Symbol Parameter
Conditions
25 C
40 C to 40 C to Unit
+85 C +125 C
Min Typ Max Min Max Min Max
74HC423
[1]
tpd
propagation
delay
nA or nB to nQ or nQ; REXT = 5 k;
CEXT = 0 pF; see Figure 7
VCC = 2.0 V
-
-
-
-
80
29
25
23
255
51
-
-
-
-
-
320
64
-
-
-
-
-
385 ns
77 ns
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
VCC = 6.0 V
-
ns
43
54
65 ns
[1]
nRD to nQ or nQ; see Figure 7
VCC = 2.0 V
-
-
-
-
66
24
20
19
215
43
-
-
-
-
-
270
54
-
-
-
-
-
325 ns
65 ns
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
VCC = 6.0 V
-
ns
37
46
55 ns
[2]
tt
transition time see Figure 7
VCC = 2.0 V
-
-
-
19
7
75
15
13
-
-
-
95
19
16
-
-
-
110 ns
22 ns
19 ns
VCC = 4.5 V
VCC = 6.0 V
6
tW
pulse width
nA input LOW; see Figure 7 and Figure 8
VCC = 2.0 V
100
20
11
4
-
-
-
125
25
-
-
-
150
30
-
-
-
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
17
3
21
26
nB input HIGH; see Figure 7 and Figure 8
VCC = 2.0 V
100 17
-
-
-
125
25
-
-
-
150
30
-
-
-
ns
ns
ns
VCC = 4.5 V
20
17
6
5
VCC = 6.0 V
21
26
nRD input LOW; see Figure 7 and Figure 8
VCC = 2.0 V
100 14
-
-
-
-
125
25
21
-
-
-
-
-
150
30
26
-
-
-
-
-
ns
ns
ns
s
VCC = 4.5 V
20
17
-
5
4
VCC = 6.0 V
nQ HIGH or nQ LOW; VCC = 5.0 V;
REXT = 10 k; CEXT = 100 nF;
see Figure 7 and Figure 8
450
[3]
[4]
nQ HIGH or nQ LOW; VCC = 5.0 V;
REXT = 5 k; CEXT = 0 pF;
-
-
75
-
-
-
-
-
-
-
-
-
-
ns
ns
VI = GND to VCC
;
see Figure 7 and Figure 8
trtrig
retrigger time nA or nB input; VCC = 5.0 V; REXT = 5 k;
110
CEXT = 0 pF; see Figure 10
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
8 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
Table 7.
Dynamic characteristics …continued
GND = 0 V; test circuit see Figure 12.
Symbol Parameter
Conditions
25 C
40 C to 40 C to Unit
+85 C +125 C
Min Typ Max Min Max Min Max
REXT
external timing VCC = 2.0 V; see Figure 8
10
2
-
-
1000
1000
-
-
-
-
-
-
-
-
k
k
pF
resistor
VCC = 5.0 V
[5]
[6]
CEXT
CPD
external timing VCC = 5.0 V; see Figure 8
capacitor
no limits
power
per package; VI = GND to VCC
-
54
-
-
-
-
-
pF
dissipation
capacitance
74HCT423
tpd
propagation
delay
nA or nB to nQ or nQ; REXT = 5 k;
CEXT = 0 pF; see Figure 7
[1]
[1]
[1]
VCC = 4.5 V
-
-
-
30
26
26
51
-
-
-
-
64
-
-
-
-
77 ns
ns
VCC = 5.0 V; CL = 15 pF
-
nRD to nQ or nQ; REXT = 5 k;
48
60
72 ns
CEXT = 0 pF; see Figure 7
[1]
[1]
[2]
V
CC = 4.5 V
VCC = 5.0 V; CL = 15 pF
transition time VCC = 4.5 V; Figure 7
pulse width trigger pulse; nA input LOW; VCC = 4.5 V;
-
-
26
22
7
48
-
-
-
60
-
-
-
72 ns
-
ns
tt
-
15
-
-
19
-
-
22 ns
tW
20
5
25
30
-
-
-
-
ns
ns
ns
s
see Figure 7 and Figure 10
trigger pulse; nB input HIGH; VCC = 4.5 V;
see Figure 7 and Figure 10
20
20
-
5
7
-
-
-
25
25
-
-
-
-
30
30
-
reset pulse; nRD input LOW; VCC = 4.5 V;
see Figure 7 and Figure 11
output pulse; nQ HIGH or nQ LOW;
VCC = 5.0 V; REXT = 10 k; CEXT = 100 nF;
see Figure 7, Figure 10 and Figure 11
450
[3]
output pulse; nQ HIGH or nQ LOW;
VCC = 5.0 V; REXT = 5 k; CEXT = 0 pF;
VI = GND to VCC 1.5 V; see Figure 7,
Figure 10 and Figure 11
-
75
-
-
-
-
-
ns
trtrig
retrigger time nA or nB input; VCC = 5.0 V; REXT = 5 k;
-
110
-
-
-
-
-
-
-
-
-
ns
CEXT = 0 pF; see Figure 10
REXT
CEXT
external timing VCC = 5.0 V; see Figure 8
resistor
2
1000
-
k
pF
[5]
external timing VCC = 5.0 V; see Figure 8
capacitor
no limits
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
9 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
Table 7.
Dynamic characteristics …continued
GND = 0 V; test circuit see Figure 12.
Symbol Parameter
Conditions
25 C
40 C to 40 C to Unit
+85 C +125 C
Min Typ Max Min Max Min Max
[6]
CPD
power
per package; VI = GND to VCC 1.5 V
-
56
-
-
-
-
-
pF
dissipation
capacitance
[1] tpd is the same as tPHL and tPLH
.
[2] tt is the same as tTHL and tTLH
.
[3] For other REXT and CEXT combinations see Figure 8. If CEXT > 10 pF, the next formula is valid:
tW = K REXT CEXT (typ.), where:
tW = output pulse width in ns;
REXT = external resistor in k;
CEXT = external capacitor in pF;
K = 0.55 for VCC = 2.0 V and 0.45 for VCC = 5.0 V; see Figure 9.
Inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is 7 pF.
[4] The time to retrigger the monostable multivibrator depends on the values of REXT and CEXT. The output pulse width will only be
extended when the time between the active-going edges of the trigger input pulses meets the minimum retrigger time.
If CEXT > 10 pF, the next formula (at VCC = 5.0 V) for the set-up time of a retrigger pulse is valid:
trtrig = 30 + 0.19 REXT CEXT0.9 + 13 REXT1.05 (typ.); where:
trtrig = retrigger time in ns;
CEXT = external capacitor in pF;
REXT = external resistor in k.
Inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is 7 pF.
[5] When the device is powered-up, initiate the device via a reset pulse, when CEXT < 50 pF.
[6] CPD is used to determine the dynamic power dissipation (PD in W):
PD = CPD VCC2 fi N + (CL VCC2 fo); where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
(CL VCC2 fo) = sum of outputs.
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
10 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
11. Waveforms
V
I
nB input
GND
V
M
t
W
V
I
V
nA input
GND
M
t
W
t
W
V
I
V
M
nRD input
GND
t
t
t
(reset)
PHL
t
PLH
PLH
PLH
V
OH
V
Y
nQ output
V
M
V
X
t
V
OL
t
t
W
TLH
THL
t
t
t
(reset)
PLH
t
PHL
PHL
PHL
V
OH
V
Y
nQ output
V
M
V
X
V
OL
t
t
t
TLH
W
THL
001aah911
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 7. Pulse widths, propagation delays from inputs (nA, nB, nRD) to outputs (nQ, nQ) and
output transition times
Table 8.
Type
Measurement points
Input
VI
Output
VM
VM
VX
VY
74HC423
VCC
3 V
0.5VCC
1.3 V
0.5VCC
1.3 V
0.1VCC
0.1VCC
0.9VCC
0.9VCC
74HCT423
74HC_HCT423
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
11 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
001aaa611
001aaa612
6
10
0.8
t
W
'K' factor
0.6
(ns)
(1)
(2)
5
4
3
2
10
(3)
(4)
10
10
10
0.4
0.2
0
10
2
3
4
1
10
10
10
10
(pF)
0
2
4
6
8
C
V
(V)
CC
EXT
VCC = 5.0 V and Tamb = 25 C.
REXT = 100 k.
External capacitance = 10 nF,
external resistance = 10 k to 100 k and Tamb = 25 C.
(1)
(2) REXT = 50 k.
(3) REXT = 10 k.
(4)
REXT = 2 k.
Fig 8. Typical output pulse width as a function of the
external capacitor values
Fig 9. Typical ‘K’ factor
nB input
t
W
nA input
t
t
rtrig
W
nQ output
t
t
W
W
t
mna521
W
nRD = HIGH.
Fig 10. Output pulse control using retrigger pulse (trtrig
)
74HC_HCT423
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Product data sheet
Rev. 6 — 19 December 2011
12 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
nB input
nRD input
t
W
nQ output
t
t
W
W
mna522
nA = LOW.
Fig 11. Output pulse control using reset input nRD
t
W
V
I
90 %
negative
pulse
V
V
V
M
M
10 %
GND
t
t
r
f
t
t
f
r
V
I
90 %
positive
pulse
V
M
M
10 %
GND
t
W
V
CC
V
V
O
I
G
DUT
R
T
C
L
001aah768
Test data is given in Table 9.
Definitions for test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
Fig 12. Test circuit for measuring switching times
Table 9.
Supply
VCC
Test data
Input
VI
Load
tr, tf
CL
2.0 V to 6.0 V
VCC
6 ns
15 pF, 50 pF
74HC_HCT423
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
13 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
12. Application information
12.1 Timing component connections
The basic output pulse width is essentially determined by the values of the external timing
components REXT and CEXT
.
C
EXT
R
EXT
(1)
V
CC
GND
8
nCEXT
14 (6)
nREXT/CEXT
15 (7)
13 (5)
423
nQ
1 (9)
nA
nB
2 (10)
4 (12)
nQ
3 (11)
nRD
001aah917
(1) For minimum noise generation it is recommended that the nCEXT pins (6, 14) are connected to ground externally to
the GND pin (8).
Fig 13. Timing component connections
12.1.1 Minimum monostable pulse width
To set the minimum pulse width, when CEXT < 10 nF, see Figure 8 and
when CEXT > 10 nF, the output pulse width is defined as:
tW = 0.45 REXT CEXT (typ.), where:
tW = pulse width in s;
REXT = external resistor in k;
CEXT = external capacitor in nF.
12.2 Power-up considerations
When the monostable is powered-up it may produce an output pulse, with a pulse width
defined by the values of REXT and CEXT, this output pulse can be eliminated using the
circuit shown in Figure 14.
74HC_HCT423
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
14 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
C
EXT
R
EXT
V
CC
GND
8
nCEXT
14 (6)
nREXT/CEXT
15 (7)
13 (5)
423
nQ
1 (9)
nA
nB
2 (10)
4 (12)
nQ
3 (11)
nRD
V
RESET
CC
001aah918
Fig 14. Power-up output pulse elimination circuit
12.3 Power-down considerations
A large capacitor CEXT may cause problems when powering-down the monostable due to
the capacitor’s stored energy. When a system containing this device is powered-down or a
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 15.
D
EXT
C
EXT
R
EXT
V
CC
GND
8
nCEXT
14 (6)
nREXT/CEXT
15 (7)
13 (5)
423
nQ
1 (9)
nA
nB
2 (10)
4 (12)
nQ
3 (11)
001aah919
nRD
Fig 15. Power-down protection circuit
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
15 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
13. Package outline
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
D
M
E
A
2
A
A
1
L
c
e
w M
Z
b
1
(e )
1
b
b
2
16
9
M
H
pin 1 index
E
1
8
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
(1)
A
A
A
2
(1)
(1)
Z
1
w
UNIT
mm
b
b
b
c
D
E
e
e
L
M
M
H
1
2
1
E
max.
min.
max.
max.
1.73
1.30
0.53
0.38
1.25
0.85
0.36
0.23
19.50
18.55
6.48
6.20
3.60
3.05
8.25
7.80
10.0
8.3
4.2
0.51
3.2
2.54
0.1
7.62
0.3
0.254
0.01
0.76
0.068 0.021 0.049 0.014
0.051 0.015 0.033 0.009
0.77
0.73
0.26
0.24
0.14
0.12
0.32
0.31
0.39
0.33
inches
0.17
0.02
0.13
0.03
Note
1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
95-01-14
03-02-13
SOT38-4
Fig 16. Package outline SOT38-4 (DIP16)
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
16 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
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 17. Package outline SOT109-1 (SO16)
74HC_HCT423
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
17 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
DHVQFN16: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;
16 terminals; body 2.5 x 3.5 x 0.85 mm
SOT763-1
B
A
D
A
A
1
E
c
detail X
terminal 1
index area
C
terminal 1
index area
e
1
y
y
e
b
v
M
C
C
A
B
C
1
w
M
2
7
L
1
8
9
E
h
e
16
15
10
D
h
X
0
2.5
scale
5 mm
DIMENSIONS (mm are the original dimensions)
(1)
A
(1)
(1)
UNIT
A
b
c
E
e
e
1
y
D
D
E
L
v
w
y
1
1
h
h
max.
0.05 0.30
0.00 0.18
3.6
3.4
2.15
1.85
2.6
2.4
1.15
0.85
0.5
0.3
mm
0.05
0.1
1
0.2
0.5
2.5
0.1
0.05
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
02-10-17
03-01-27
SOT763-1
- - -
MO-241
- - -
Fig 18. Package outline SOT763-1 (DHVQFN16)
74HC_HCT423
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
18 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
D
E
A
X
c
y
H
v
M
A
E
Z
9
16
Q
A
2
A
(A )
3
A
1
pin 1 index
θ
L
p
L
8
1
detail X
w M
b
p
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
A
(1)
(1)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
Q
v
w
y
Z
θ
p
p
1
2
3
E
max.
8o
0o
0.21
0.05
1.80
1.65
0.38
0.25
0.20
0.09
6.4
6.0
5.4
5.2
7.9
7.6
1.03
0.63
0.9
0.7
1.00
0.55
mm
2
0.25
0.65
1.25
0.2
0.13
0.1
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-19
SOT338-1
MO-150
Fig 19. Package outline SOT338-1 (SSOP16)
74HC_HCT423
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
19 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
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 20. Package outline SOT403-1 (TSSOP16)
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
20 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
14. Abbreviations
Table 10. Abbreviations
Acronym
CMOS
DUT
Description
Complementary Metal Oxide Semiconductor
Device Under Test
ESD
ElectroStatic Discharge
Human Body Model
Machine Model
HBM
MM
TTL
Transistor-Transistor Logic
15. Revision history
Table 11. Revision history
Document ID
Release date
20111219
Data sheet status
Change notice Supersedes
74HC_HCT423 v.6
Modifications:
Product data sheet
-
74HC_HCT423 v.5
• Legal pages updated.
74HC_HCT423 v.5
74HC_HCT423 v.4
74HC_HCT423 v.3
74HC_HCT423_CNV v.2
20110825
20110318
20080724
19980708
Product data sheet
-
-
-
-
74HC_HCT423 v.4
74HC_HCT423 v.3
74HC_HCT423_CNV v.2
-
Product data sheet
Product data sheet
Product specification
74HC_HCT423
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Product data sheet
Rev. 6 — 19 December 2011
21 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
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.
malfunction of an NXP Semiconductors product can reasonably be expected
16.2 Definitions
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts 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.
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.
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.
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
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.
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.
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.
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.
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.
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.
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.
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
74HC_HCT423
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
22 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
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
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.
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
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_HCT423
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 19 December 2011
23 of 24
74HC423; 74HCT423
NXP Semiconductors
Dual retriggerable monostable multivibrator with reset
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. . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recommended operating conditions. . . . . . . . 6
Static characteristics. . . . . . . . . . . . . . . . . . . . . 6
Dynamic characteristics . . . . . . . . . . . . . . . . . . 8
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7
8
9
10
11
12
Application information. . . . . . . . . . . . . . . . . . 14
Timing component connections . . . . . . . . . . . 14
Minimum monostable pulse width. . . . . . . . . . 14
Power-up considerations . . . . . . . . . . . . . . . . 14
Power-down considerations . . . . . . . . . . . . . . 15
12.1
12.1.1
12.2
12.3
13
14
15
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 21
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 21
16
Legal information. . . . . . . . . . . . . . . . . . . . . . . 22
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 22
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
16.1
16.2
16.3
16.4
17
18
Contact information. . . . . . . . . . . . . . . . . . . . . 23
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
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. 2011.
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: 19 December 2011
Document identifier: 74HC_HCT423
相关型号：
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