74AHC123A; 74AHCT123A
Dual retriggerable monostable multivibrator with reset
Rev. 6 — 4 September 2023
Product data sheet
1. General description
The 74AHC123A; 74AHCT123A is a dual retriggerable monostable multivibrator with reset. The
basic output pulse width is programmed by selection of external components (REXT and CEXT).
Once triggered this basic pulse width may be extended by retriggering either of the edge triggered
inputs (nA or (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. Inputs are overvoltage tolerant. This feature allows the use of
these devices as translators in mixed voltage environments.
2. Features and benefits
•
•
•
•
•
•
•
•
•
•
•
•
Wide supply voltage range from 2.0 V to 5.5 V
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output pulse
Overvoltage tolerant inputs to 5.5 V
All inputs have a Schmitt-trigger action
High noise immunity
Input levels:
• For 74AHC123A: CMOS level
• For 74AHCT123A: TTL level
Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
ESD protection:
• HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
• CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range
Name
Description
Version
74AHC123AD
74AHCT123AD
-40 °C to +125 °C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74AHC123APW
74AHCT123APW
-40 °C to +125 °C
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
74AHC123ABQ
74AHCT123ABQ
-40 °C to +125 °C
DHVQFN16
plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5 × 3.5 × 0.85 mm
SOT763-1
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
4. Functional diagram
14
15
1
14 1CEXT
6 2CEXT
2A 9
13 1Q
5 2Q
6
T
1B 2
2B 10
7
4 1Q
Q
13
&
4
3
S
Q
RCX
2
15 1REXT/CEXT
7 2REXT/CEXT
1A 1
CX
9
12 2Q
R
CX
RCX
5
&
10
RD
1RD 3
12
2RD 11
11
R
001aae522
001aae521
Fig. 1.
Logic symbol
Fig. 2.
IEC logic symbol
14
15
S
1A
1B
1RD
Q
1
13
Q
2
2RD
1Q
4
1Q
RD
3
6
S
2B
1REXT/CEXT
T
7
2A
1CEXT
Q
9
5
2CEXT
2REXT/CEXT
2Q
T
10
Q
12
2Q
RD
11
aaa-000650
Fig. 3.
Functional diagram
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
2 / 20
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
R
001aae524
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
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
3 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1. Pinning
D package
SOT109-1 (SO16)
1A
1
16 VCC
1B
2
15 1REXT/CEXT
1RD
3
14 1CEXT
1Q
4
13 1Q
2Q
5
12 2Q
2CEXT
6
11 2RD
2REXT/CEXT
7
10 2B
GND
8
9
2A
aaa-035377
1
1A
terminal 1
index area
PW package
SOT403-1 (TSSOP16)
1A
1
16 VCC
16 VCC
BQ package
SOT763-1 (DHVQFN16)
1B
2
15 1REXT/CEXT
1RD
3
14 1CEXT
1B
2
15 1REXT/CEXT
1Q
4
13 1Q
1RD
3
14 1CEXT
2Q
5
12 2Q
1Q
4
13 1Q
6
5
12 2Q
2CEXT
2Q
2REXT/CEXT
7
8
9
2A
aaa-035378
9
10 2B
GND
8
11 2RD
7
2A
6
11
2RD
10 2B
GND
2CEXT
2REXT/CEXT
GND(1)
aaa-035379
Transparent top view
(1) This is not a ground pin. There is no electrical or mechanical requirement to solder
the pad. In case soldered, the solder land should remain floating or connected to GND.
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
4 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
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
6. Functional description
Table 3. Function table
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.
Input
nRD
[1]
Output
nA
nB
nQ
nQ
L
X
X
L
H
X
H
X
L [1]
H [1]
X
X
L
L [1]
H [1]
H
L
↑
H
↓
H
↑
L
H
If the monostable multivibrator was triggered before this condition was established, the pulse will continue as programmed.
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
5 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
Min
Max
Unit
VCC
supply voltage
-0.5
+7.0
V
VI
input voltage
-0.5
+7.0
V
IIK
input clamping current
VI < -0.5 V
[1]
-20
-
mA
IOK
output clamping current
VO < -0.5 V or VO > VCC + 0.5 V
[1]
-
±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
-
500
mW
[1]
[2]
Tamb = -40 °C to +125 °C
[2]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SOT109-1 (SO16) package: Ptot derates linearly with 12.4 mW/K above 110 °C.
For SOT403-1 (TSSOP16) package: Ptot derates linearly with 8.5 mW/K above 91 °C.
For SOT763-1 (DHVQFN16) package: Ptot derates linearly with 11.2 mW/K above 106 °C.
8. Recommended operating conditions
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
VCC
supply voltage
VI
input voltage
VO
output voltage
Tamb
ambient temperature
Δt/ΔV
input transition rise and
fall rate
74AHC_AHCT123A
Product data sheet
Conditions
74AHC123A
74AHCT123A
Unit
Min
Typ
Max
Min
Typ
Max
2.0
5.0
5.5
4.5
5.0
5.5
V
0
-
5.5
0
-
5.5
V
0
-
VCC
0
-
VCC
V
-40
+25
+125
-40
+25
+125
°C
VCC = 3.3 V ± 0.3 V
-
-
100
-
-
-
ns/V
VCC = 5.0 V ± 0.5 V
-
-
20
-
-
20
ns/V
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
6 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
9. Static characteristics
Table 6. Static characteristics
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
-40 °C to
+125 °C
Unit
Min
Typ
Max
Min
Max
Min
Max
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 μA; VCC = 2.0 V
1.9
2.0
-
1.9
-
1.9
-
V
IO = -50 μA; VCC = 3.0 V
2.9
3.0
-
2.9
-
2.9
-
V
IO = -50 μA; 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 μA; VCC = 2.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 μA; VCC = 3.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 μA; 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 μA
-
-
±0.1
-
±1.0
-
±2.0
μA
-
-
4.0
-
40
-
80
μA
VCC = 3.0 V
-
160
250
-
280
-
280
μA
VCC = 4.5 V
-
380
500
-
650
-
650
μA
VCC = 5.5 V
-
560
750
-
975
-
975
μA
74AHC123A
VIH
VIL
VOH
VOL
II
HIGH-level
input voltage
LOW-level
input voltage
HIGH-level
output voltage
LOW-level
output voltage
input leakage
current
VI = VIH or VIL
VI = VIH or VIL
VI = 5.5 V or GND;
VCC = 0 V to 5.5 V
nREXT/CEXT
[1]
pins nA, nB, nRD
ICC
supply current
VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
active state (per circuit);
VI = VCC or GND
[1]
CI
input
capacitance
-
5.0
10
-
10
-
10
pF
CO
output
capacitance
-
4.0
-
-
-
-
-
pF
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
7 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
-40 °C to
+125 °C
Min
Typ
Max
Min
Max
Min
Max
Unit
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 μA
4.4
4.5
-
4.4
-
4.4
-
V
IO = -8.0 mA
3.94
-
-
3.8
-
3.70
-
V
IO = 50 μA
-
0
0.1
-
0.1
-
0.1
V
IO = 8.0 mA
-
-
0.36
-
0.44
-
0.55
V
-
-
±0.25
-
±2.5
-
±10.0 μA
pins nA, nB, nRD;
VI = VCC or GND; VCC = 5.5 V
-
-
±0.1
-
±1.0
-
±2.0
μA
VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
4.0
-
40
-
80
μA
VCC = 4.5 V
-
380
500
-
650
-
650
μA
VCC = 5.5 V
VOL
II
ICC
LOW-level
output voltage
input leakage
current
supply current
VI = VIH or VIL; VCC = 4.5 V
nREXT/CEXT;
VI = 5.5 V or GND;
VCC = 0 V to 5.5 V
[1]
active state (per circuit);
VI = VCC or GND
[1]
-
560
750
-
975
-
975
μA
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
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
8 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7. Dynamic characteristics
GND = 0 V; For test circuit see Fig. 10.
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
Min Typ[1] Max
-40 °C to
+125 °C
Min
Max
Min
Max
Unit
74AHC123A
tpd
propagation nA and nB to nQ and nQ; see Fig. 5
delay
VCC = 3.0 V to 3.6 V; CL = 15 pF
[2]
-
7.4
20.6
1.0
24.0
1.0
26.0
ns
VCC = 3.0 V to 3.6 V; CL = 50 pF
-
10.5
24.1
1.0
27.5
1.0
30.0
ns
VCC = 4.5 V to 5.5 V; CL = 15 pF
-
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 = 3.0 V to 3.6 V; CL = 15 pF
-
8.2
22.4
1.0
26.0
1.0
28.0
ns
VCC = 3.0 V to 3.6 V; CL = 50 pF
-
11.7
25.9
1.0
29.5
1.0
32.0
ns
VCC = 4.5 V to 5.5 V; CL = 15 pF
-
5.6
12.9
1.0
15.0
1.0
16.5
ns
VCC = 4.5 V to 5.5 V; CL = 50 pF
-
8.1
14.9
1.0
17.0
1.0
19.0
ns
VCC = 3.0 V to 3.6 V; CL = 15 pF
-
6.4
15.8
1.0
18.5
1.0
20.0
ns
VCC = 3.0 V to 3.6 V; CL = 50 pF
-
9.2
19.3
1.0
22.0
1.0
24.5
ns
VCC = 4.5 V to 5.5 V; CL = 15 pF
-
4.4
9.4
1.0
11.0
1.0
12.0
ns
VCC = 4.5 V to 5.5 V; CL = 50 pF
-
6.3
11.4
1.0
13.0
1.0
14.5
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
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
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
μs
VCC = 4.5 V to 5.5 V
90
100
110
90
110
85
115
μs
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 = 4.5 V to 5.5 V; CL = 50 pF
nRD to nQ and nQ; see Fig. 5
[2]
nRD to nQ and nQ (reset); see Fig. 5 [2]
tW
pulse width
inputs; nA = LOW; see Fig. 5
inputs; nB = HIGH; see Fig. 5
inputs; nRD = LOW; see Fig. 5
outputs; nQ = LOW and
nQ = HIGH; CL = 50 pF;
see Fig. 5, Fig. 6, Fig. 7 and Fig. 8
[3]
CEXT = 28 pF; REXT = 2 kΩ
CEXT = 0.01 μF; REXT = 10 kΩ
CEXT = 0.1 μF; REXT = 10 kΩ;
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
9 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
Min Typ[1] Max
trtrig
retrigger
time
-40 °C to
+125 °C
Min
Max
Min
Max
Unit
nA to nB; CEXT = 100 pF;
REXT = 1 kΩ; CL = 50 pF;
see Fig. 6 and Fig. 8
VCC = 3.0 V to 3.6 V
-
60
-
-
-
-
-
ns
VCC = 4.5 V to 5.5 V
-
39
-
-
-
-
-
ns
VCC = 3.0 V to 3.6 V
-
1.5
-
-
-
-
-
μs
VCC = 4.5 V to 5.5 V
-
1.2
-
-
-
-
-
μs
-
57
-
-
-
-
-
pF
-
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
VCC = 4.5 V to 5.5 V; CL = 15 pF
-
5.2
12.9
1.0
15.0
1.0
16.5
ns
VCC = 4.5 V to 5.5 V; CL = 50 pF
-
7.5
14.9
1.0
17.0
1.0
18.5
ns
VCC = 4.5 V to 5.5 V; CL = 15 pF
-
4.7
9.4
1.0
11.0
1.0
12.0
ns
VCC = 4.5 V to 5.5 V; 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
μs
0.9
1
1.1
0.9
1.1
0.85
1.15
ms
nA to nB; CEXT = 0.01 μF;
REXT = 1 kΩ; CL = 50 pF;
see Fig. 6 and Fig. 8
CPD
power
CL = 50 pF; fi = 1 MHz;
dissipation
VI = GND to VCC
capacitance
[4]
74AHCT123A
tpd
propagation nA and nB to nQ and nQ; see Fig. 5
delay
VCC = 4.5 V to 5.5 V; CL = 15 pF
[2]
VCC = 4.5 V to 5.5 V; CL = 50 pF
nRD to nQ and nQ; see Fig. 5
[2]
nRD to nQ and nQ (reset); see Fig. 5 [2]
tW
pulse width
inputs; nA = LOW; CL = 50 pF;
see Fig. 5
VCC = 4.5 V to 5.5 V
inputs; nB = HIGH; CL = 50 pF;
see Fig. 5
VCC = 4.5 V to 5.5 V
inputs; nRD = LOW; CL = 50 pF;
see Fig. 5
VCC = 4.5 V to 5.5 V
outputs; nQ = LOW and
nQ = HIGH; CL = 50 pF;
CEXT = 28 pF; REXT = 2 kΩ;
see Fig. 5, Fig. 6, Fig. 7 and Fig. 8
VCC = 4.5 V to 5.5 V
[3]
CEXT = 0.01 μF; REXT = 10 kΩ
VCC = 4.5 V to 5.5 V
CEXT = 0.1 μF; REXT = 10 kΩ
VCC = 4.5 V to 5.5 V
74AHC_AHCT123A
Product data sheet
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10 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
Min Typ[1] Max
trtrig
retrigger
time
-40 °C to
+125 °C
Min
Max
Min
Max
Unit
nA to nB; CEXT = 100 pF;
REXT = 1 kΩ; CL = 50 pF;
see Fig. 6 and Fig. 8
VCC = 4.5 V to 5.5 V
-
60
-
-
-
-
-
ns
-
1.5
-
-
-
-
-
μs
-
58
-
-
-
-
-
pF
VCC = 2.0 V
5
-
-
-
-
-
-
kΩ
VCC > 3.0 V
1
-
-
-
-
-
-
kΩ
[5]
-
-
-
-
-
-
-
pF
[5]
-
-
-
-
-
-
-
pF
nA to nB; CEXT = 0.01 μF;
REXT = 1 kΩ; CL = 50 pF;
see Fig. 6 and Fig. 8
VCC = 4.5 V to 5.5 V
CPD
power
CL = 50 pF; fi = 1 MHz;
dissipation
VI = GND to VCC
capacitance
[4]
External components
REXT
CEXT
[1]
[2]
[3]
[4]
[5]
external
resistance
VCC = 2.0 V
external
capacitance V > 3.0 V
CC
Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
tpd is the same as tPLH and tPHL; CEXT = 0 pF; REXT = 5 kΩ.
For CEXT ≥ 10 nF the typical value of the pulse width tW (μs) = CEXT (nF) × REXT (kΩ).
CPD is used to determine the dynamic power dissipation PD (μW).
2
2
PD = CPD × VCC × fi + Σ(CL × VCC × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V.
CEXT has no limits.
74AHC_AHCT123A
Product data sheet
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11 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
10.1. Waveforms and test circuit
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. 5.
Propagation delay input (nA, nB, nRD) to output (nQ, nQ)
Table 8. Measurement points
Type
Input
Output
VM
VM
74AHC123A
0.5 × VCC
0.5 × VCC
74AHCT123A
1.5 V
0.5 × VCC
nB input
tW
nA input
trtrig
tW
nQ output
tW
tW
001aae526
nRD = HIGH
Fig. 6.
Output pulse control using retrigger pulse
74AHC_AHCT123A
Product data sheet
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Rev. 6 — 4 September 2023
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Nexperia B.V. 2023. All rights reserved
12 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
nB input
nRD input
nQ output
tW
tW
001aae527
nA = LOW
Fig. 7.
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. 8.
Input and output timing
VCC
REXT
CEXT
to nCEXT
(pin 14 or 6)
to nREXT/CEXT
(pin 15 or 7)
mna519
Fig. 9.
Timing component connections
74AHC_AHCT123A
Product data sheet
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Rev. 6 — 4 September 2023
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13 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
VI
negative
pulse
tW
90 %
VM
0V
VI
positive
pulse
0V
VM
10 %
tf
tr
tr
tf
90 %
VM
VM
10 %
tW
VCC
G
VI
DUT
VCC
VO
RL
RT
S1
open
CL
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. 10. Test circuit for measuring switching times
Table 9. Test data
Type
Input
Load
S1 position
VI
tr, tf
CL
RL
tPHL, tPLH
tPZH, tPHZ
tPZL, tPLZ
74AHC123A
VCC
3.0 ns
15 pF, 50 pF
1 kΩ
open
GND
VCC
74AHCT123A
3.0 V
3.0 ns
15 pF, 50 pF
1 kΩ
open
GND
VCC
74AHC_AHCT123A
Product data sheet
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©
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14 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
11. 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
w M
bp
0
2.5
detail X
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
inches
0.069
0.010 0.057
0.004 0.049
0.01
0.019 0.0100 0.39
0.014 0.0075 0.38
0.16
0.15
0.05
0.039
0.016
0.028
0.020
0.01
0.01
0.004
0.028
0.012
0.244
0.041
0.228
θ
o
8
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. 11. Package outline SOT109-1 (SO16)
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
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Nexperia B.V. 2023. All rights reserved
15 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
D
SOT403-1
E
A
X
c
y
HE
v M A
Z
9
16
Q
A2
pin 1 index
(A 3 )
A1
A
θ
Lp
1
L
8
detail X
w M
bp
e
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
0o
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. 12. Package outline SOT403-1 (TSSOP16)
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
16 / 20
74AHC123A; 74AHCT123A
Nexperia
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
B
D
A
A
E
A1
c
detail X
terminal 1
index area
terminal 1
index area
C
e1
e
b
2
7
y
y1 C
v M C A B
w M C
L
1
8
Eh
e
16
9
15
10
Dh
X
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A(1)
max.
A1
b
c
D (1)
Dh
E (1)
Eh
e
e1
L
v
w
y
y1
mm
1
0.05
0.00
0.30
0.18
0.2
3.6
3.4
2.15
1.85
2.6
2.4
1.15
0.85
0.5
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. 13. Package outline SOT763-1 (DHVQFN16)
74AHC_AHCT123A
Product data sheet
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Rev. 6 — 4 September 2023
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Nexperia B.V. 2023. All rights reserved
17 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
12. 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
TTL
Transistor-Transistor Logic
13. Revision history
Table 11. Revision history
Document ID
Release date
Data sheet status
Change notice Supersedes
74AHC_AHCT123A v.6
20230904
Product data sheet
-
Modifications:
•
74AHC_AHCT123A v.5
20200617
Modifications:
•
•
•
•
Section 2: ESD specification updated according to the latest JEDEC standard.
20111108
Modifications:
•
74AHC_AHCT123A v.3
20110908
74AHC_AHCT123A v.2
74AHC_AHCT123A v.1
Product data sheet
Product data sheet
-
74AHC_AHCT123A v.4
The format of this data sheet has been redesigned to comply with the identity
guidelines of Nexperia.
Legal texts have been adapted to the new company name where appropriate.
Section 1 and Section 2 updated.
Table 4: Derating values for Ptot total power dissipation updated.
74AHC_AHCT123A v.4
74AHC_AHCT123A
74AHC_AHCT123A v.5
Product data sheet
-
74AHC_AHCT123A v.3
Product data sheet
-
74AHC_AHCT123A v.2
20080118
Product data sheet
-
74AHC_AHCT123A v.1
20000315
Product specification
-
-
Legal pages updated.
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
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Nexperia B.V. 2023. All rights reserved
18 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
14. Legal information
injury, death or severe property or environmental damage. Nexperia and its
suppliers accept 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.
Data sheet status
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
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]
[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 https://www.nexperia.com.
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.
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. Nexperia takes no responsibility
for the content in this document if provided by an information source outside
of Nexperia.
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.
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.
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 malfunction
of an Nexperia product can reasonably be expected to result in personal
74AHC_AHCT123A
Product data sheet
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.
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
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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.
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
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.
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.
Trademarks
Notice: All referenced brands, product names, service names and
trademarks are the property of their respective owners.
All information provided in this document is subject to legal disclaimers.
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19 / 20
74AHC123A; 74AHCT123A
Nexperia
Dual retriggerable monostable multivibrator with reset
Contents
1. General description...................................................... 1
2. Features and benefits.................................................. 1
3. Ordering information....................................................1
4. Functional diagram.......................................................2
5. Pinning information......................................................4
5.1. Pinning.........................................................................4
5.2. Pin description............................................................. 5
6. Functional description................................................. 5
7. Limiting values............................................................. 6
8. Recommended operating conditions..........................6
9. Static characteristics....................................................7
10. Dynamic characteristics............................................ 9
10.1. Waveforms and test circuit...................................... 12
11. Package outline........................................................ 15
12. Abbreviations............................................................ 18
13. Revision history........................................................18
14. Legal information......................................................19
©
Nexperia B.V. 2023. 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: 4 September 2023
74AHC_AHCT123A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 4 September 2023
©
Nexperia B.V. 2023. All rights reserved
20 / 20