74HC123PW [NEXPERIA]
Dual retriggerable monostable multivibrator with resetProduction;型号: | 74HC123PW |
厂家: | Nexperia |
描述: | Dual retriggerable monostable multivibrator with resetProduction 时钟 输入元件 光电二极管 逻辑集成电路 |
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74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Rev. 12 — 11 August 2021
Product data sheet
1. General description
The 74HC123; 74HCT123 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 include clamp diodes. This enables the use of current
limiting resistors to interface inputs to voltages in excess of VCC
.
Schmitt-trigger action in the nA and nB inputs, makes the circuit highly tolerant to slower input rise
and fall times.
2. Features and benefits
•
Wide supply voltage range from 2.0 V to 6.0 V
•
•
•
•
CMOS low power dissipation
High noise immunity
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Complies with JEDEC standards:
•
•
JESD8C (2.7 V to 3.6 V)
JESD7A (2.0 V to 6.0 V)
•
Input levels:
•
•
For 74HC123: CMOS level
For 74HCT123: TTL level
•
•
•
•
•
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
ESD protection:
•
•
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
•
•
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range Name
Description
Version
74HC123D
-40 °C to +125 °C
-40 °C to +125 °C
-40 °C to +125 °C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74HCT123D
74HC123PW
74HCT123PW
74HC123BQ
TSSOP16
plastic thin shrink small outline package; 16 leads; SOT403-1
body width 4.4 mm
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
4. Functional diagram
14
1CEXT
15
1REXT/CEXT
S
13
1Q
1Q
Q
Q
1
1A
T
4
2
3
1B
RD
1RD
6
7
2CEXT
2REXT/CEXT
S
5
2Q
2Q
Q
Q
9
2A
T
12
10
11
2B
RD
2RD
001aaa610
Fig. 1. Functional diagram
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
2 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
14
CX
15
13
RCX
1
&
2
1CEXT 14
2CEXT
4
6
3
R
1REXT/CEXT 15
2REXT/CEXT
7
6
S
CX
1Q 13
7
5
Q
Q
RCX
2Q
5
1
9
1A
2A
9
T
&
10
1Q
4
2
1B
12
2Q 12
RD
10 2B
11
R
3
1RD
mna515
11
2RD
mna516
Fig. 2. Logic symbol
Fig. 3. IEC logic symbol
nREXT/CEXT
V
CC
nQ
nQ
nRD
R
R
CL
CL
V
CC
V
CC
R
CL
CL
CL
nA
nB
R
mna518
Fig. 4. Logic diagram
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
3 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1. Pinning
74HC123
terminal 1
index area
2
3
4
5
6
7
15
14
13
12
11
10
1B
1RD
1REXT/CEXT
1CEXT
1Q
74HC123
74HCT123
1Q
2Q
2Q
1A
1
2
3
4
5
6
7
8
16 V
CC
(1)
CC
2CEXT
2REXT/CEXT
2RD
2B
V
1B
1RD
15 1REXT/CEXT
14 1CEXT
13 1Q
1Q
001aaf046
2Q
12 2Q
2CEXT
2REXT/CEXT
GND
11 2RD
Transparent top view
10 2B
(1) This is not a supply pin. There is no electrical or
mechanical requirement to solder the pad. In case
soldered, the solder land should remain floating or
9
2A
001aaa698
connected to VCC
.
Fig. 5. Pin configuration SOT109-1 (SO16) and
SOT403-1 (TSSOP16)
Fig. 6. Pin configuration SOT763-1 (DHVQFN16)
5.2. Pin description
Table 2. Pin description
Symbol
Pin
1
Description
1A
negative-edge triggered input 1
positive-edge triggered input 1
direct reset LOW and positive-edge triggered input 1
active LOW output 1
1B
2
1RD
3
1Q
4
2Q
5
active HIGH output 2
2CEXT
6
external capacitor connection 2
external resistor and capacitor connection 2
ground (0 V)
2REXT/CEXT
7
GND
8
2A
9
negative-edge triggered input 2
positive-edge triggered input 2
direct reset LOW and positive-edge triggered input 2
active LOW output 2
2B
10
11
12
13
14
15
16
2RD
2Q
1Q
active HIGH output 1
1CEXT
1REXT/CEXT
VCC
external capacitor connection 1
external resistor and capacitor connection 1
supply voltage
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
4 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
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
Output
nRD
L
nA
X
nB
X
nQ
L
nQ
H
X
H
X
X
L [1]
L [1]
H [1]
H [1]
X
L
H
L
↑
H
↑
↓
H
H
L
[1] If the monostable 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 Unit
supply voltage
-0.5
+7
V
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
-
-
-
±20
±20
±25
mA
mA
mA
IOK
IO
except for pins nREXT/CEXT;
VO = -0.5 V to (VCC + 0.5 V)
ICC
supply current
-
-
50
mA
mA
IGND
Tstg
Ptot
ground current
-50
storage temperature
total power dissipation
-65
-
+150 °C
500 mW
[1]
[1] 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.
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
5 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
8. Recommended operating conditions
Table 5. Recommended operating conditions
Symbol Parameter
Conditions
74HC123
74HCT123
Unit
Min
2.0
0
Typ
Max
6.0
Min
4.5
0
Typ
Max
5.5
VCC
VI
supply voltage
input voltage
output voltage
5.0
5.0
V
V
V
-
-
VCC
VCC
-
-
VCC
VCC
VO
0
0
Δt/ΔV
input transition rise and
fall rate
nRD input
VCC = 2.0 V
-
-
-
625
139
83
-
-
-
-
ns/V
VCC = 4.5 V
VCC = 6.0 V
1.67
-
1.67
-
139 ns/V
ns/V
+125 °C
-
-
-
Tamb
ambient temperature
-40
+25
+125
-40
+25
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min Typ Max
Min
Max
Min
Max
74HC123
VIH
HIGH-level
input voltage
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
VI = VIH or VIL
1.5
1.2
2.4
3.2
0.8
-
-
1.5
-
-
1.5
-
-
V
V
V
V
V
V
3.15
3.15
3.15
4.2
-
4.2
-
4.2
-
VIL
LOW-level
input voltage
-
-
-
0.5
-
-
-
0.5
1.35
1.8
-
-
-
0.5
1.35
1.8
2.1 1.35
2.8
1.8
VOH
HIGH-level
output voltage
IO = -20 μA; VCC = 2.0 V
1.9
4.4
5.9
2.0
4.5
6.0
-
-
-
-
-
1.9
4.4
-
-
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
-
-
V
V
V
V
V
IO = -20 μA; VCC = 4.5 V
IO = -20 μA; VCC = 6.0 V
IO = -4 mA; VCC = 4.5 V
IO = -5.2 mA; VCC = 6.0 V
5.9
3.98 4.32
5.48 5.81
3.84
5.34
VOL
LOW-level
VI = VIH or VIL
output voltage
IO = 20 μA; VCC = 2.0 V
IO = 20 μA; VCC = 4.5 V
IO = 20 μA; VCC = 6.0 V
IO = 4 mA; VCC = 4.5 V
IO = 5.2 mA; VCC = 6.0 V
-
-
-
-
-
-
0
0
0
0.1
0.1
0.1
-
-
-
-
-
-
0.1
0.1
-
-
-
-
-
-
0.1
0.1
0.1
0.4
0.4
±1.0
V
V
0.1
V
0.15 0.26
0.16 0.26
0.33
0.33
±1.0
V
V
II
input leakage VI = VCC or GND; VCC = 6.0 V
current
-
±0.1
8.0
-
μA
ICC
CI
supply current VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
-
-
-
-
-
80
-
-
-
160
-
μA
pF
input
3.5
capacitance
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
6 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Symbol Parameter
74HCT123
Conditions
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min Typ Max
Min
Max
Min
Max
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
2.0
-
1.6
1.2
-
2.0
-
-
2.0
-
-
V
V
VIL
LOW-level
0.8
0.8
0.8
input voltage
VOH
HIGH-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = -20 μA
4.4
4.5
-
-
4.4
-
-
4.4
3.7
-
-
V
V
IO = -4 mA
3.98 4.32
3.84
VOL
LOW-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 μA
-
-
-
0
0.1
-
-
-
0.1
-
-
-
0.1
0.4
V
IO = 4.0 mA
0.15 0.26
0.33
±1.0
V
II
input leakage VI = VCC or GND; VCC = 5.5 V
current
-
±0.1
±1.0
μA
ICC
ΔICC
supply current VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
8.0
-
80
-
160
μA
additional
supply current VI = VCC - 2.1 V;
other inputs at VCC or GND;
per input pin; IO = 0 A;
VCC = 4.5 V to 5.5 V
pins nA, nB
-
-
-
35
50
125
180
-
-
-
-
160
225
-
-
-
-
170
245
-
μA
μA
pF
pin nRD
CI
input
3.5
capacitance
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
7 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Fig. 12.
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min Typ Max
Min
Max
Min
Max
74HC123
tpd
propagation
delay
nRD, nA, nB to nQ or nQ;
CEXT = 0 pF; REXT = 5 kΩ;
see Fig. 9
[1]
VCC = 2.0 V
-
-
-
-
83 255
-
-
-
-
320
64
-
-
-
-
-
385
77
-
ns
ns
ns
ns
VCC = 4.5 V
30
26
24
51
-
VCC = 5 V; CL = 15 pF
VCC = 6.0 V
43
54
65
nRD (reset) to nQ or nQ;
CEXT = 0 pF; REXT = 5 kΩ;
see Fig. 9
VCC = 2.0 V
-
-
-
-
66 215
-
-
-
-
270
54
-
-
-
-
-
325
65
-
ns
ns
ns
ns
VCC = 4.5 V
24
20
19
43
-
VCC = 5 V; CL = 15 pF
VCC = 6.0 V
37
46
55
tt
transition time see Fig. 9
VCC = 2.0 V
[1]
-
-
-
19
7
75
15
13
-
-
-
95
19
16
-
-
-
110
22
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
6
19
tW
pulse width
nA LOW; see Fig. 10
VCC = 2.0 V
100
20
8
3
2
-
-
-
125
25
-
-
-
150
30
-
-
-
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
17
21
26
nB HIGH; see Fig. 10
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 LOW; see Fig. 11
VCC = 2.0 V
100 14
-
-
-
125
25
-
-
-
150
30
-
-
-
ns
ns
ns
VCC = 4.5 V
20
17
5
4
VCC = 6.0 V
21
26
nQ HIGH and nQ LOW;
VCC = 5.0 V; see Fig. 10
and Fig. 11
[2]
CEXT = 100 nF;
REXT = 10 kΩ
-
-
-
450
75
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
μs
ns
ns
CEXT = 0 pF;
REXT = 5 kΩ
trtrig
retrigger time nA, nB; CEXT = 0 pF;
REXT = 5 kΩ; VCC = 5.0 V;
see Fig. 10
[3] [4]
110
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
8 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min Typ Max
Min
Max
Min
Max
REXT
external timing see Fig. 7
resistor
VCC = 2.0 V
10
2
-
-
-
1000
1000
-
-
-
-
-
-
-
-
-
-
-
-
-
kΩ
kΩ
pF
VCC = 5.0 V
CEXT
CPD
external timing VCC = 5.0 V; see Fig. 7
capacitor
[4]
[5]
-
power
dissipation
capacitance
per monostable;
VI = GND to VCC
-
54
-
-
-
-
-
pF
74HCT123
tPHL HIGH to LOW nRD, nA, nB to nQ or nQ;
propagation
delay
CEXT = 0 pF; REXT = 5 kΩ;
see Fig. 9
VCC = 4.5 V
-
-
30
26
51
-
-
-
64
-
-
-
77
-
ns
ns
VCC = 5 V; CL = 15 pF
nRD (reset) to nQ or nQ;
CEXT = 0 pF; REXT = 5 kΩ;
see Fig. 9
VCC = 4.5 V
-
-
27
23
46
-
-
-
58
-
-
-
69
-
ns
ns
VCC = 5 V; CL = 15 pF
tPLH
LOW to HIGH nRD, nA, nB to nQ or nQ;
propagation
delay
CEXT = 0 pF; REXT = 5 kΩ;
see Fig. 9
VCC = 4.5 V
-
-
28
26
51
-
-
-
64
-
-
-
77
-
ns
ns
VCC = 5 V; CL = 15 pF
nRD (reset) to nQ or nQ;
CEXT = 0 pF; REXT = 5 kΩ;
see Fig. 9
VCC = 4.5 V
-
-
-
23
23
7
46
-
-
-
-
58
-
-
-
-
69
-
ns
ns
ns
VCC = 5 V; CL = 15 pF
tt
transition time VCC = 4.5 V; see Fig. 9
[1]
[2]
15
19
22
tW
pulse width
VCC = 4.5 V
nA LOW; see Fig. 10
nB HIGH; see Fig. 10
nRD LOW; see Fig. 11
20
20
20
3
5
7
-
-
-
25
25
25
-
-
-
30
30
30
-
-
-
ns
ns
ns
nQ HIGH and nQ LOW;
VCC = 5.0 V; see Fig. 10
and Fig. 11
CEXT = 100 nF;
REXT = 10 kΩ
-
-
-
450
75
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
μs
ns
ns
CEXT = 0 pF;
REXT = 5 kΩ
trtrig
retrigger time nA, nB; CEXT = 0 pF;
REXT = 5 kΩ; VCC = 5.0 V;
see Fig. 10
[3] [4]
110
REXT
CEXT
external timing VCC = 5.0 V; see Fig. 7
resistor
2
-
-
-
1000
-
-
-
-
-
-
-
-
-
kΩ
pF
external timing VCC = 5.0 V; see Fig. 7
capacitor
[4]
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
9 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min Typ Max
Min
Max
Min
Max
CPD
power
per monostable;
[5]
-
56
-
-
-
-
-
pF
dissipation
capacitance
VI = GND to VCC - 1.5 V
[1] tpd is the same as tPHL and tPLH; tt is the same as tTHL and tTLH
[2] For other REXT and CEXT combinations see Fig. 7. If CEXT > 10 nF, the next formula is valid:
tW = K × REXT × CEXT, where:
tW = typical output pulse width in ns;
REXT = external resistor in kΩ;
CEXT = external capacitor in pF;
K = constant = 0.45 for VCC = 5.0 V and 0.55 for VCC = 2.0 V, see Fig. 8.
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is approximately 7 pF.
[3] 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 setup time of a retrigger pulse is valid:
trtrig = 30 + 0.19 × REXT × CEXT 0.9 + 13 × REXT 1.05, where:
trtrig = retrigger time in ns;
CEXT = external capacitor in pF; REXT = external resistor in kΩ.
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is 7 pF.
[4] When the device is powered-up, initiate the device via a reset pulse, when CEXT < 50 pF.
[5] CPD is used to determine the dynamic power dissipation (PD in μW).
PD = CPD x VCC 2 x fi + Σ(CL x VCC 2 x fo) + 0.75 x CEXT x VCC 2 x fo + D x 16 × VCC where:
fi = input frequency in MHz;
fo = output frequency in MHz;
D = duty factor in %;
CL = output load capacitance in pF;
VCC = supply voltage in V;
CEXT = timing capacitance in pF;
Σ(CL x VCC 2 x fo) sum of outputs.
001aaa611
6
10
t
W
(ns)
(1)
(2)
5
4
3
2
10
001aaa612
0.8
(3)
(4)
10
10
10
'K' factor
0.6
0.4
0.2
0
10
2
3
4
1
10
10
10
10
(pF)
C
EXT
VCC = 5.0 V; Tamb = 25 °C.
(1) REXT = 100 kΩ
(2) REXT = 50 kΩ
0
2
4
6
8
V
(V)
CC
(3) REXT = 10 kΩ
CEXT = 10 nF; REXT = 10 kΩ to 100 kΩ.
Tamb = 25 °C.
(4) REXT = 2 kΩ
Fig. 7. Typical output pulse width as a function of the
external capacitor value
Fig. 8. 74HC123 typical ‘K’ factor as function of VCC
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74HC_HCT123
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Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
10 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
10.1. Waveforms and test circuit
V
I
V
nB input
M
GND
t
W
V
I
V
M
nA input
GND
t
W
V
I
V
nRD input
GND
M
t
t
t
W
PLH
PLH
V
OH
V
Y
nQ output
V
M
V
X
V
OL
t
t
t
t
THL
PHL
(reset)
PLH
t
W
t
W
V
OH
V
Y
nQ output
V
M
V
X
V
OL
t
t
t
PLH
t
PHL
PHL
PHL
TLH
(reset)
001aaa771
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 9. Propagation delays from inputs (nA, nB, nRD) to outputs (nQ, nQ) and output transition times
nB input
t
W
nA input
t
t
W
rtrig
nQ output
t
t
W
W
t
mna521
W
nRD = HIGH
Fig. 10. Output pulse control using retrigger pulse
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74HC_HCT123
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Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
11 / 20
Nexperia
74HC123; 74HCT123
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 %
0 V
t
t
r
f
t
t
f
r
V
I
90 %
positive
pulse
V
M
M
10 %
0 V
t
W
V
V
CC
CC
V
I
V
O
R
L
S1
G
open
DUT
R
T
C
L
001aad983
Test data is given in Table 8.
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. 12. Test circuit for measuring switching times
Table 8. Test data
Type
Input
VI
Load
S1 position
tPHL, tPLH
open
tr, tf
6 ns
6 ns
CL
RL
74HC123
VCC
3 V
15 pF, 50 pF
15 pF, 50 pF
1 kΩ
1 kΩ
74HCT123
open
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74HC_HCT123
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Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
12 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
11. Application information
11.1. 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 nREXT/CEXT
14 (6) 15 (7)
13 (5)
123
nQ
nQ
1 (9)
nA
nB
2 (10)
4 (12)
3 (11)
nRD
001aaa854
(1) For minimum noise generation it is recommended to ground pins 6 (2CEXT) and
14 (1CEXT) externally to pin 8 (GND).
Fig. 13. Timing component connections
11.2. 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 Fig. 14.
C
EXT
R
EXT
V
CC
GND
8
nCEXT
14 (6)
nREXT/CEXT
15 (7)
13 (5)
123
nQ
1 (9)
nA
nB
2 (10)
4 (12)
nQ
3 (11)
nRD
V
RESET
CC
001aaa613
Fig. 14. Power-up output pulse elimination circuit
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
13 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
11.3. Power-down considerations
A large capacitor CEXT may cause problems when powering-down the monostable due to the
energy stored in this capacitor. 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 Fig. 15.
D
EXT
C
EXT
R
EXT
V
CC
GND
8
nCEXT
14 (6)
nREXT/CEXT
15 (7)
13 (5)
123
nQ
1 (9)
nA
nB
2 (10)
4 (12)
nQ
3 (11)
001aaa614
nRD
Fig. 15. Power-down protection circuit
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74HC_HCT123
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Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
14 / 20
Nexperia
74HC123; 74HCT123
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
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
E
L
L
p
Q
v
w
y
Z
θ
1
2
3
p
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
0.1
0.25
0.01
8o
0o
0.0100
0.0075
0.010 0.057
0.004 0.049
0.019
0.014
0.39
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. 16. Package outline SOT109-1 (SO16)
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74HC_HCT123
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Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
15 / 20
Nexperia
74HC123; 74HCT123
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
1
0.2
0.13
0.1
0.25
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. 17. Package outline SOT403-1 (TSSOP16)
©
74HC_HCT123
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Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
16 / 20
Nexperia
74HC123; 74HCT123
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
1
b
c
E
h
e
e
y
D
D
E
L
v
w
y
1
1
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_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
17 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
13. Abbreviations
Table 9. Abbreviations
Acronym
CMOS
DUT
Abbreviation
Complementary Metal Oxide Semiconductor
Device Under Test
ESD
ElectroStatic Discharge
Human Body Model
Machine Model
HBM
MM
TTL
Transistor-Transistor Logic
14. Revision history
Table 10. Revision history
Document ID
Release date
20210811
Data sheet status
Change notice
Supersedes
74HC_HCT123 v.12
Modifications:
Product data sheet
-
74HC_HCT123 v.11
•
Type numbers 74HC123DB and 74HCT123DB (SOT338-1/SSOP16) removed.
74HC_HCT123 v.11
Modifications:
20200903 Product data sheet 74HC_HCT123 v.10
-
•
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 have been updated.
74HC_HCT123 v.10
Modifications:
20151203
Type numbers 74HC123N and 74HCT123N (SOT38-4) removed.
20150119 Product data sheet
Product data sheet
-
74HC_HCT123 v.9
•
74HC_HCT123 v.9
Modifications:
-
74HC_HCT123 v.8
•
Table 7: Power dissipation capacitance condition for 74HCT123 is corrected.
74HC_HCT123 v.8
Modifications:
20111216
Product data sheet
-
74HC_HCT123 v.7
•
Legal pages updated.
74HC_HCT123 v.7
74HC_HCT123 v.6
74HC_HCT123 v.5
74HC_HCT123 v.4
74HC_HCT123 v.3
20110825
20110314
20090713
20060616
20040511
Product data sheet
Product data sheet
Product data sheet
Product data sheet
Product specification
Product specification
-
-
-
-
-
-
74HC_HCT123 v.6
74HC_HCT123 v.5
74HC_HCT123 v.4
74HC_HCT123 v.3
74HC_HCT123_CNV v.2
-
74HC_HCT123_CNV v.2 19980708
©
74HC_HCT123
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Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
18 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
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.
15. Legal information
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.
Data sheet status
Document status Product
Definition
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.
[1][2]
status [3]
Objective [short]
data sheet
Development
This document contains data from
the objective specification for
product development.
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.
Preliminary [short]
data sheet
Qualification
Production
This document contains data from
the preliminary specification.
Product [short]
data sheet
This document contains the product
specification.
[1] Please consult the most recently issued document before initiating or
completing a design.
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.
[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 https://www.nexperia.com.
Definitions
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.
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.
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.
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.
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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
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Export control — This document as well as the item(s) described herein
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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.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified, the
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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 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.
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.
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
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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.
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.
Trademarks
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
Notice: All referenced brands, product names, service names and
trademarks are the property of their respective owners.
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
19 / 20
Nexperia
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Contents
1. General description......................................................1
2. Features and benefits.................................................. 1
3. Ordering information....................................................2
4. Functional diagram.......................................................2
5. Pinning information......................................................4
5.1. Pinning.........................................................................4
5.2. Pin description.............................................................4
6. Functional description................................................. 5
7. Limiting values............................................................. 5
8. Recommended operating conditions..........................6
9. Static characteristics....................................................6
10. Dynamic characteristics............................................ 8
10.1. Waveforms and test circuit...................................... 11
11. Application information............................................13
11.1. Timing component connections............................... 13
11.2. Power-up considerations..........................................13
11.3. Power-down considerations.....................................14
12. Package outline........................................................ 15
13. Abbreviations............................................................18
14. Revision history........................................................18
15. Legal information......................................................19
© Nexperia B.V. 2021. 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: 11 August 2021
©
74HC_HCT123
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 12 — 11 August 2021
20 / 20
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