74AHC123A; 74AHCT123A
Dual retriggerable monostable multivibrator with reset
Rev. 4 — 8 November 2011
Product data sheet
1. General description
The 74AHC123A; 74AHCT123A 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 74AHC123A; 74AHCT123A are dual retriggerable monostable multivibrators with
output pulse width control by three methods. The basic pulse time is programmed by
selection of an external resistor (REXT) and capacitor (CEXT). The external resistor and
capacitor are normally connected as shown in Figure 11.
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. Alternatively an output delay can be terminated at any time by a LOW-going edge
on input nRD, which also inhibits the triggering.
An internal connection from nRD to the input gate makes it possible to trigger the circuit by
a positive-going signal at input nRD as shown in Table 3. Figure 8 and Figure 9 illustrate
pulse control by retriggering and early reset. The basic output pulse width is essentially
determined by the value of the external timing components REXT and CEXT. When
CEXT 10 nF, the typical output pulse width is defined as: tW = REXT CEXT where
tW = pulse width in ns; REXT = external resistor in k; CEXT = external capacitor in pF.
Schmitt-trigger action at all inputs makes the circuit highly tolerant to slower input rise and
fall times.
2. Features and benefits
All inputs have a Schmitt-trigger action
Inputs accept voltages higher than VCC
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output pulse
For 74AHC123A only: operates with CMOS input levels
For 74AHCT123A only: operates with TTL input levels
ESD protection:
HBM JESD22-A114E exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
CDM JESD22-C101C exceeds 1000 V
Multiple package options
Specified from 40 C to +85 C and from 40 C to +125 C
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
3. Ordering information
Table 1.
Ordering information
Type number
74AHC123AD
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; SOT403-1
body width 4.4 mm
40 C to +125 C
DHVQFN16
plastic dual in-line compatible thermal enhanced
SOT763-1
very thin quad flat package; no leads; 16 terminals;
body 2.5 3.5 0.85 mm
74AHCT123AD
74AHC123APW
74AHCT123APW
74AHC123ABQ
74AHCT123ABQ
4. Functional diagram
14
15
1
14 1CEXT
6 2CEXT
CX
RCX
13
&
2
15 1REXT/CEXT
7 2REXT/CEXT
4
3
R
S
Q
1A 1
2A 9
1B 2
2B 10
13 1Q
5 2Q
6
T
7
Q
4 1Q
9
12 2Q
CX
RCX
5
&
10
RD
1RD 3
12
2RD 11
11
R
001aae521
Fig 1. Logic symbol
74AHC_AHCT123A
Product data sheet
001aae522
Fig 2. IEC logic symbol
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Rev. 4 — 8 November 2011
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Nexperia B.V. 2017. All rights reserved
2 of 22
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
14
15
S
1A
1B
1RD
Q
1
13
4
Q
2
2RD
1Q
1Q
RD
3
6
S
2B
1REXT/CEXT
T
7
2A
1CEXT
5
Q
9
2CEXT
2REXT/CEXT
2Q
T
Q
10
12
2Q
RD
11
aaa-000650
Fig 3. Functional diagram
74AHC_AHCT123A
Product data sheet
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Rev. 4 — 8 November 2011
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Nexperia B.V. 2017. All rights reserved
3 of 22
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
nREXT/CEXT
VCC
Q
RD
R
Q
R
CL
VCC
CL
VCC
R
CL
A
B
CL
CL
001aae524
R
For minimum noise generation it is recommended to ground pins 6 (2CEXT) and 14 (1CEXT) externally to pin 8 (GND).
Fig 4. Functional diagram
74AHC_AHCT123A
Product data sheet
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Nexperia B.V. 2017. All rights reserved
4 of 22
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1 Pinning
1
1A
terminal 1
index area
74AHC123A
74AHCT123A
1RD
3
14 1CEXT
1Q
4
13 1Q
2Q
5
12 2Q
2CEXT
6
11 2RD
2REXT/CEXT
7
10 2B
GND
8
9
1RD
3
14 1CEXT
1Q
4
13 1Q
2Q
5
12 2Q
2CEXT
6
2REXT/CEXT
7
2A
GND(1)
11 2RD
10 2B
9
15 1REXT/CEXT
15 1REXT/CEXT
8
16 VCC
2
2
2A
1
1B
1B
GND
1A
16 VCC
74AHC123A
74AHCT123A
001aah067
Transparent top view
001aah068
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as
a supply pin or input.
Fig 5. Pin configuration SO16, TSSOP16
Fig 6. Pin configuration DHVQFN16
5.2 Pin description
Table 2.
Pin description
Symbol
Pin
Description
1A
1
negative-edge triggered input 1
1B
2
positive-edge triggered input 1
1RD
3
direct reset LOW and positive-edge triggered input 1
1Q
4
active LOW output 1
2Q
5
active HIGH output 2
2CEXT
6
external capacitor connection 2
2REXT/CEXT
7
external resistor and capacitor connection 2
GND
8
ground (0 V)
2A
9
negative-edge triggered input 2
2B
10
positive-edge triggered input 2
2RD
11
direct reset LOW and positive-edge triggered input 2
2Q
12
active LOW output 2
1Q
13
active HIGH output 1
1CEXT
14
external capacitor connection 1
1REXT/CEXT
15
external resistor and capacitor connection 1
VCC
16
supply voltage
74AHC_AHCT123A
Product data sheet
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Rev. 4 — 8 November 2011
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Nexperia B.V. 2017. All rights reserved
5 of 22
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
6. Functional description
Function table[1]
Table 3.
Input
Output
nRD
nA
nB
nQ
nQ
L
X
X
L
H
H[2]
H[2]
X
H
X
L[2]
X
X
L
L[2]
H
L
H
H
L
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
Parameter
VCC
supply voltage
VI
input voltage
Conditions
Min
Max
Unit
0.5
+7.0
V
0.5
+7.0
V
IIK
input clamping current
VI < 0.5 V
[1]
IOK
output clamping current
VO < 0.5 V or VO > VCC + 0.5 V
[1]
20
-
mA
-
20
mA
IO
output current
VO = 0.5 V to (VCC + 0.5 V)
-
25
mA
ICC
supply current
-
75
mA
IGND
ground current
75
-
mA
Tstg
storage temperature
65
+150
C
Ptot
total power dissipation
Tamb = 40 C to +125 C
SO16 package
[2]
-
500
mW
TSSOP16 package
[3]
-
500
mW
DHVQFN16 package
[4]
-
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.
[4]
Ptot derates linearly with 4.5 mW/K above 60 C.
74AHC_AHCT123A
Product data sheet
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Rev. 4 — 8 November 2011
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Nexperia B.V. 2017. All rights reserved
6 of 22
74AHC123A; 74AHCT123A
Nexperia
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
74AHC123A
Min
74AHCT123A
Typ
Max
Min
Typ
Unit
Max
VCC
supply voltage
2.0
5.0
5.5
4.5
5.0
5.5
V
VI
input voltage
0
-
5.5
0
-
5.5
V
VO
output voltage
0
-
VCC
0
-
VCC
V
Tamb
ambient temperature
40
+25
+125
40
+25
+125
C
t/V
input transition rise
and fall rate
VCC = 3.3 V 0.3 V
-
-
100
-
-
-
ns/V
VCC = 5.0 V 0.5 V
-
-
20
-
-
20
ns/V
9. Static characteristics
Table 6.
Static characteristics
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
-
-
1.5
-
1.5
-
V
VCC = 3.0 V
2.1
-
-
2.1
-
2.1
-
V
VCC = 5.5 V
3.85
-
-
3.85
-
3.85
-
V
VCC = 2.0 V
-
-
0.5
-
0.5
-
0.5
V
VCC = 3.0 V
-
-
0.9
-
0.9
-
0.9
V
VCC = 5.5 V
-
-
1.65
-
1.65
-
1.65
V
IO = 50 A; VCC = 2.0 V
1.9
2.0
-
1.9
-
1.9
-
V
IO = 50 A; VCC = 3.0 V
2.9
3.0
-
2.9
-
2.9
-
V
IO = 50 A; VCC = 4.5 V
4.4
4.5
-
4.4
-
4.4
-
V
IO = 4.0 mA; VCC = 3.0 V
2.58
-
-
2.48
-
2.40
-
V
IO = 8.0 mA; VCC = 4.5 V
3.94
-
-
3.8
-
3.70
-
V
IO = 50 A; VCC = 2.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 A; VCC = 3.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 A; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
IO = 4.0 mA; VCC = 3.0 V
-
-
0.36
-
0.44
-
0.55
V
IO = 8.0 mA; VCC = 4.5 V
-
-
0.36
-
0.44
-
0.55
V
-
-
0.25
-
2.5
-
10.0
A
-
-
0.1
-
1.0
-
2.0
A
74AHC123A
VIH
VIL
VOH
VOL
II
HIGH-level
input voltage
LOW-level
input voltage
HIGH-level
output
voltage
LOW-level
output
voltage
VI = VIH or VIL
VI = VIH or VIL
input leakage VI = 5.5 V or GND;
current
VCC = 0 V to 5.5 V
[1]
nREXT/CEXT
pins nA, nB, nRD
74AHC_AHCT123A
Product data sheet
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74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
Table 6.
Static characteristics …continued
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
ICC
supply
current
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ
Max
Min
Max
Min
Max
-
-
4.0
-
40
-
80
A
VCC = 3.0 V
-
160
250
-
280
-
280
A
VCC = 4.5 V
-
380
500
-
650
-
650
A
VCC = 5.5 V
-
560
750
-
975
-
975
A
VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
[1]
active state (per circuit);
VI = VCC or GND
CI
input
capacitance
-
5.0
10
-
10
-
10
pF
CO
output
capacitance
-
4.0
-
-
-
-
-
pF
74AHCT123A
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
2.0
-
-
2.0
-
2.0
-
V
VIL
LOW-level
input voltage
VCC = 4.5 V to 5.5 V
-
-
0.8
-
0.8
-
0.8
V
VOH
HIGH-level
output
voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 50 A
4.4
4.5
-
4.4
-
4.4
-
V
IO = 8.0 mA
3.94
-
-
3.8
-
3.70
-
V
LOW-level
output
voltage
VI = VIH or VIL; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
VOL
II
ICC
IO = 50 A
IO = 8.0 mA
-
-
0.36
-
0.44
-
0.55
V
-
-
0.25
-
2.5
-
10.0
A
pins nA, nB, nRD;
VI = VCC or GND;
VCC = 5.5 V
-
-
0.1
-
1.0
-
2.0
A
VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
4.0
-
40
-
80
A
VCC = 4.5 V
-
380
500
-
650
-
650
A
VCC = 5.5 V
[1]
input leakage nREXT/CEXT;
current
VI = 5.5 V or GND;
VCC = 0 V to 5.5 V
supply
current
active state (per circuit);
VI = VCC or GND
[1]
-
560
750
-
975
-
975
A
CI
input
capacitance
-
3
10
-
10
-
10
pF
CO
output
capacitance
-
4.0
-
-
-
-
-
pF
[1]
Voltage on nREXT/CEXT = 0.5 VCC and pin nREXT/CEXT in OFF-state during test.
74AHC_AHCT123A
Product data sheet
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Rev. 4 — 8 November 2011
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Nexperia B.V. 2017. All rights reserved
8 of 22
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V; For test circuit see Figure 12.
Symbol Parameter
25 C
Conditions
Min
40 C to +85 C 40 C to +125 C Unit
Typ[1]
Max
Min
Max
Min
Max
74AHC123A
tpd
propagation
delay
nA and nB to nQ and nQ;
see Figure 7
[2]
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
7.4
20.6
1.0
24.0
1.0
26.0
ns
CL = 50 pF
-
10.5
24.1
1.0
27.5
1.0
30.0
ns
-
5.1
12.0
1.0
14.0
1.0
15.5
ns
-
7.3
14.0
1.0
16.0
1.0
17.5
ns
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
[2]
nRD to nQ and nQ;
see Figure 7
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
8.2
22.4
1.0
26.0
1.0
28.0
ns
CL = 50 pF
-
11.7
25.9
1.0
29.5
1.0
32.0
ns
-
5.6
12.9
1.0
15.0
1.0
16.5
ns
-
8.1
14.9
1.0
17.0
1.0
19.0
ns
CL = 15 pF
-
6.4
15.8
1.0
18.5
1.0
20.0
ns
CL = 50 pF
-
9.2
19.3
1.0
22.0
1.0
24.5
ns
CL = 15 pF
-
4.4
9.4
1.0
11.0
1.0
12.0
ns
CL = 50 pF
-
6.3
11.4
1.0
13.0
1.0
14.5
ns
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
nRD to nQ and nQ (reset);
see Figure 7
[2]
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
74AHC_AHCT123A
Product data sheet
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Rev. 4 — 8 November 2011
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Nexperia B.V. 2017. All rights reserved
9 of 22
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
Table 7.
Dynamic characteristics …continued
GND = 0 V; For test circuit see Figure 12.
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 = 3.0 V to 3.6 V
5.0
-
-
5.0
-
5.0
-
ns
VCC = 4.5 V to 5.5 V
5.0
-
-
5.0
-
5.0
-
ns
VCC = 3.0 V to 3.6 V
5.0
-
-
5.0
-
5.0
-
ns
VCC = 4.5 V to 5.5 V
5.0
-
-
5.0
-
5.0
-
ns
5.0
-
-
5.0
-
5.0
-
ns
5.0
-
-
5.0
-
5.0
-
ns
inputs; nA = LOW;
see Figure 7
inputs; nB = HIGH;
see Figure 7
inputs; nRD = LOW;
see Figure 7
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
[3]
outputs; nQ = LOW and
nQ = HIGH; CL = 50 pF;
see Figure 7, Figure 8,
Figure 9 and Figure 10
CEXT = 28 pF; REXT = 2 k
VCC = 3.0 V to 3.6 V
-
115
240
-
300
-
300
ns
VCC = 4.5 V to 5.5 V
-
100
200
-
240
-
240
ns
VCC = 3.0 V to 3.6 V
90
100
110
90
110
85
115
s
VCC = 4.5 V to 5.5 V
90
100
110
90
110
85
115
s
VCC = 3.0 V to 3.6 V
0.9
1
1.1
0.9
1.1
0.85
1.15
ms
VCC = 4.5 V to 5.5 V
0.9
1
1.1
0.9
1.1
0.85
1.15
ms
VCC = 3.0 V to 3.6 V
-
60
-
-
-
-
-
ns
VCC = 4.5 V to 5.5 V
-
39
-
-
-
-
-
ns
-
1.5
-
-
-
-
-
s
-
1.2
-
-
-
-
-
s
-
57
-
-
-
-
-
pF
CEXT = 0.01 F;
REXT = 10 k
CEXT = 0.1 F;
REXT = 10 k;
trtrig
retrigger
time
nA to nB; CEXT = 100 pF;
REXT = 1 k; CL = 50 pF;
see Figure 8 and Figure 10
nA to nB; CEXT = 0.01 F;
REXT = 1 k; CL = 50 pF;
see Figure 8 and Figure 10
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
CPD
power
CL = 50 pF; fi = 1 MHz;
dissipation
VI = GND to VCC
capacitance
74AHC_AHCT123A
Product data sheet
[4]
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 8 November 2011
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Nexperia B.V. 2017. All rights reserved
10 of 22
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
Table 7.
Dynamic characteristics …continued
GND = 0 V; For test circuit see Figure 12.
Symbol Parameter
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ[1]
Max
Min
Max
Min
Max
-
5.0
12.0
1.0
14.0
1.0
15.5
ns
-
7.1
14.0
1.0
16.0
1.0
17.5
ns
CL = 15 pF
-
5.2
12.9
1.0
15.0
1.0
16.5
ns
CL = 50 pF
-
7.5
14.9
1.0
17.0
1.0
18.5
ns
CL = 15 pF
-
4.7
9.4
1.0
11.0
1.0
12.0
ns
CL = 50 pF
-
6.7
11.4
1.0
13.0
1.0
14.5
ns
5.0
-
-
5.0
-
5.0
-
ns
5.0
-
-
5.0
-
5.0
-
ns
5.0
-
-
5.0
-
5.0
-
ns
-
100
200
-
240
-
240
ns
90
100
110
90
110
85
115
s
0.9
1
1.1
0.9
1.1
0.85
1.15
ms
74AHCT123A
tpd
propagation
delay
nA and nB to nQ and nQ;
see Figure 7
[2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
[2]
nRD to nQ and nQ;
see Figure 7
VCC = 4.5 V to 5.5 V
nRD to nQ and nQ (reset);
see Figure 7
[2]
VCC = 4.5 V to 5.5 V
tW
pulse width
inputs; nA = LOW;
CL = 50 pF; see Figure 7
VCC = 4.5 V to 5.5 V
inputs; nB = HIGH;
CL = 50 pF; see Figure 7
VCC = 4.5 V to 5.5 V
inputs; nRD = LOW;
CL = 50 pF; see Figure 7
VCC = 4.5 V to 5.5 V
outputs; nQ = LOW and
nQ = HIGH; CL = 50 pF;
CEXT = 28 pF; REXT = 2 k;
see Figure 7, Figure 8,
Figure 9 and Figure 10
VCC = 4.5 V to 5.5 V
[3]
CEXT = 0.01 F;
REXT = 10 k
VCC = 4.5 V to 5.5 V
CEXT = 0.1 F;
REXT = 10 k
VCC = 4.5 V to 5.5 V
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
Table 7.
Dynamic characteristics …continued
GND = 0 V; For test circuit see Figure 12.
Symbol Parameter
trtrig
retrigger
time
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ[1]
Max
Min
Max
Min
Max
-
60
-
-
-
-
-
ns
-
1.5
-
-
-
-
-
s
-
58
-
-
-
-
-
pF
5
-
-
-
-
-
-
k
nA to nB; CEXT = 100 pF;
REXT = 1 k; CL = 50 pF;
see Figure 8 and Figure 10
VCC = 4.5 V to 5.5 V
nA to nB; CEXT = 0.01 F;
REXT = 1 k; CL = 50 pF;
see Figure 8 and Figure 10
VCC = 4.5 V to 5.5 V
power
CL = 50 pF; fi = 1 MHz;
dissipation
VI = GND to VCC
capacitance
CPD
[4]
External components
REXT
external
resistance
CEXT
external
VCC = 2.0 V
capacitance V > 3.0 V
CC
VCC = 2.0 V
VCC > 3.0 V
1
-
-
-
-
-
-
k
[5]
-
-
-
-
-
-
-
pF
[5]
-
-
-
-
-
-
-
pF
[1]
Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2]
tpd is the same as tPLH and tPHL; CEXT = 0 pF; REXT = 5 k.
[3]
For CEXT 10 nF the typical value of the pulse width tW (s) = CEXT (nF) REXT (k).
[4]
CPD is used to determine the dynamic power dissipation PD (W).
PD = CPD VCC2 fi + (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.
[5]
CEXT has no limits.
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
11. Waveforms
nB input
(nA LOW)
VM
tW
VM
nA input
(nB HIGH)
tW
RESET
VM
nRD input
tPLH
nQ output
tPLH
tW
VM
tPHL
tW
nQ output
tPLH
tW
VM
tPHL
tPHL
tPLH
tPHL
001aae528
Measurement points are given in Table 8.
Fig 7.
Propagation delay input (nA, nB, nRD) to output (nQ, nQ)
Table 8.
Measurement points
Type
Input
Output
VM
VM
74AHC123A
0.5VCC
0.5VCC
74AHCT123A
1.5 V
0.5VCC
nB input
tW
nA input
trtrig
tW
nQ output
tW
tW
001aae526
nRD = HIGH
Fig 8. Output pulse control using retrigger pulse
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
nB input
nRD input
nQ output
tW
tW
001aae527
nA = LOW
Fig 9.
Output pulse control using reset input nRD
trt
nA input
nB input
nRD input
nREXT/CEXT
nQ output
nQ output
tW
tW
tW + trt
001aah086
Fig 10. Input and output timing
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
VCC
REXT
CEXT
to nCEXT
(pin 14 or 6)
to nREXT/CEXT
(pin 15 or 7)
mna519
Fig 11. Timing component connections
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 resistor
S1 = Test selection switch
Fig 12. Load circuitry for switching times
Table 9.
Test data
Type
Input
VI
tr, tf
CL
RL
tPHL, tPLH
tPZH, tPHZ
tPZL, tPLZ
74AHC123A
VCC
3.0 ns
15 pF, 50 pF
1 k
open
GND
VCC
74AHCT123A
3.0 V
3.0 ns
15 pF, 50 pF
1 k
open
GND
VCC
74AHC_AHCT123A
Product data sheet
Load
S1 position
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Dual retriggerable monostable multivibrator with reset
12. 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 13. Package outline SOT109-1 (SO16)
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
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
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
MO-153
Fig 14. Package outline SOT403-1 (TSSOP16)
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
DHVQFN16: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;
SOT763-1
16 terminals; body 2.5 x 3.5 x 0.85 mm
A
B
D
A
A1
E
c
detail X
terminal 1
index area
terminal 1
index area
C
e1
e
2
7
y
y1 C
v M C A B
w M C
b
L
1
8
Eh
e
16
9
15
10
Dh
X
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
mm
A(1)
max.
A1
b
1
0.05
0.00
0.30
0.18
c
D (1)
Dh
E (1)
Eh
0.2
3.6
3.4
2.15
1.85
2.6
2.4
1.15
0.85
e
0.5
e1
L
v
w
y
y1
2.5
0.5
0.3
0.1
0.05
0.05
0.1
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
JEITA
SOT763-1
---
MO-241
---
EUROPEAN
PROJECTION
ISSUE DATE
02-10-17
03-01-27
Fig 15. Package outline SOT763-1 (DHVQFN16)
74AHC_AHCT123A
Product data sheet
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Rev. 4 — 8 November 2011
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Dual retriggerable monostable multivibrator with reset
13. Abbreviations
Table 10.
Abbreviations
Acronym
Description
CDM
Charged-Device Model
CMOS
Complementary Metal Oxide Semiconductor
DUT
Device Under Test
ESD
ElectroStatic Discharge
HBM
Human Body Model
MM
Machine Model
TTL
Transistor-Transistor Logic
14. Revision history
Table 11.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
74AHC_AHCT123A v.4
20111108
Product data sheet
-
74AHC_AHCT123A v.3
-
74AHC_AHCT123A v.2
Modifications:
•
Legal pages updated.
74AHC_AHCT123A v.3
20110908
Product data sheet
74AHC_AHCT123A v.2
20080118
Product data sheet
-
74AHC_AHCT123A v.1
74AHC_AHCT123A v.1
20000315
Product specification
-
-
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
15. Legal information
15.1 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.nexperia.com.
15.2 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. Nexperia 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 Nexperia 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
Nexperia and its customer, unless Nexperia and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the Nexperia product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
15.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, Nexperia 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 Nexperia 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, Nexperia’s 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 Nexperia.
malfunction of a Nexperia product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. Nexperia accepts no liability for inclusion and/or use of
Nexperia 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. Nexperia 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 Nexperia products, and Nexperia
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the Nexperia
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.
Nexperia 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 Nexperia
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). Nexperia 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 — Nexperia
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nexperia.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. Nexperia hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of Nexperia products by customer.
Right to make changes — Nexperia 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.
Suitability for use — Nexperia 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
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.
74AHC_AHCT123A
Product data sheet
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Dual retriggerable monostable multivibrator with reset
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia 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. Nexperia
accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
Nexperia’s specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies Nexperia for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond Nexperia’s
standard warranty and Nexperia’s product specifications.
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 Nexperia’s warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
16. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
74AHC_AHCT123A
Product data sheet
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Nexperia B.V. 2017. All rights reserved
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Dual retriggerable monostable multivibrator with reset
17. Contents
1
2
3
4
5
5.1
5.2
6
7
8
9
10
11
12
13
14
15
15.1
15.2
15.3
15.4
16
17
©
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 6
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended operating conditions. . . . . . . . 7
Static characteristics. . . . . . . . . . . . . . . . . . . . . 7
Dynamic characteristics . . . . . . . . . . . . . . . . . . 9
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 19
Legal information. . . . . . . . . . . . . . . . . . . . . . . 20
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 20
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Contact information. . . . . . . . . . . . . . . . . . . . . 21
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Nexperia B.V. 2017. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release: 08 November 2011