1. General description
The 74LV123 is a low-voltage Si-gate CMOS device and is pin and function compa tible
with the 74HC123; 74HCT123. It is a dual retriggerable monostable multivibrator which
uses three methods to control the output pulse width:
1. The basic pulse time is programmed by the sele ction of an external resistor (REXT)
and capacitor (CEXT). These are norma lly con n ec ted as sh own in Figure 9.
2. Once triggered, the basic output pulse width may b e extended by retrigger ing the
gated active LOW- going edge input (nA) or the active HIGH-going edge in put (nB). By
repeating this process, the ou tput pulse peri od (nQ = HIGH, n Q = LOW) can be made
as long as desired (see Figure 12).
3. Alternatively, an output delay can be ter mina ted at an y time by a LOW - going edg e on
input nRD, which also inhibits the triggering (see Figure 13).
Schmitt-trigger action in the nA and nB inputs makes the circuit highly tolerant of slower
input rise and fall times.
2. Features and benefits
Optimized for low-volta ge applications: 1.0 V to 5.5 V
Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V
Typical output ground bounce: < 0.8 V at VCC = 3.3 V and Tamb = 25 C
Typical HIGH-leve l ou tput vo ltage (VOH) undershoot: > 2 V at VCC = 3.3 V and
Tamb = 25 C
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset termina te s ou tp ut puls es
Schmitt-trigger action on all inputs except for the rese t input
74LV123
Dual retriggerable monostable multivibrator with reset
Rev. 8 — 4 March 2016 Product data sheet
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 2 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
3. Ordering information
4. Functional diagram
Tabl e 1. Ordering information
Type number Package
Temperature range Name Description Version
74LV123D 40 Cto+125C SO16 plastic small outline package; 16 leads; body width
3.9 mm SOT109-1
74LV123DB 40 Cto+125C SSOP16 plastic shrink small outline package; 16 leads; body width
5.3 mm SOT338-1
74LV123PW 40 Cto+125C TSSOP16 plastic thin shrink small outline package; 16 leads; bo dy
width 4.4 mm SOT403-1
74LV123BQ 40 Cto+125C 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
Fig 1. Logic symbol Fig 2. IEC logic symbol
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 3 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
Fig 3. Functional diag ram
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 4 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
Fig 4. Logic diagra m
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 5 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1 Pinning
5.2 Pin description
(1) This is not a supply pin. The substrate is attached to this
pad using conductive die attach material. There is no
electrical or mechanical requirement to solder this pad.
However, if it is soldered, the solder land should remain
floating or be connected to VCC.
Fig 5. Pin configuration for SO16 and (T)SSOP16 Fig 6. Pin configuration for DHVQFN16
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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 LO W 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
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 6 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
6. Functional description
[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.
Table 3. Function table[1]
Input Output
nRDnA nB nQ nQ
LXXLH
XHXL
[2] H[2]
XXLL
[2] H[2]
HL
HH
LH
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 7 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
7. Limiting values
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For SO16 package: Ptot derates linearly with 8 mW/K above 70 C.
[3] For SSOP16 and TSSOP16 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
[4] For DHVQFN16 package: Ptot derates linearly with 4.5 mW/K above 60 C.
8. Recommended operating conditions
[1] The 74LV123 is guaranteed to function down to VCC = 1.0 V (input levels GND or VCC); Section 9 “Static characteristics” are guaranteed
from VCC = 1.2 V to VCC = 5.5 V.
[2] Except for Schmitt-trigger inputs nA and nB.
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 V
IIK input clamping current VI<0.5 V or VI>V
CC +0.5V [1] -20 mA
IOK output clamping current VO<0.5 V or VO>V
CC +0.5V [1] -50 mA
IOoutput current except for pins nREXT/CEXT;
VO=0.5 V to (VCC +0.5V) [1] -25 mA
ICC supply current -+50mA
IGND ground current 50 - mA
Tstg storage temperature 65 +150 C
Ptot total power dissipation Tamb =40 C to +125 C
SO16 package [2] -500mW
SSOP16 package [3] -500mW
TSSOP16 package [3] -500mW
DHVQFN16 package [4] -500mW
Table 5. Recommended operating conditions
Symbol Parameter Conditions Min Typ Max Unit
VCC supply voltage [1] 1.0 3.3 5.5 V
VIinput voltage 0 - VCC V
VOoutput voltage 0 - VCC V
Tamb ambient temperature in free air 40 +25 +125 C
t/V input transition rise and fall rate VCC = 1.0 V to 2.0 V [2] - - 500 ns/V
VCC = 2.0 V to 2.7 V - - 200 ns/V
VCC = 2.7 V to 3.6 V - - 100 ns/V
VCC = 3.6 V to 5.5 V - - 50 ns/V
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 8 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ[1] Max Unit
Tamb = 40 C to +85 C
VIH HIGH-level input voltage VCC = 1.2 V 0.9 - - V
VCC = 2.0 V 1.4 - - V
VCC = 2.7 V to 3.6 V 2.0 - - V
VCC = 4.5 V to 5.5 V 0.7 VCC --V
VIL LOW-level input voltage VCC = 1.2 V - - 0.3 V
VCC = 2.0 V - - 0.6 V
VCC = 2.7 V to 3.6 V - - 0.8 V
VCC = 4.5 V to 5.5 V - - 0.3 VCC V
VOH HIGH-level output voltage VI = VIH or VIL
lO = 100 A; VCC = 1.2 V - 1.2 - V
lO = 100 A; VCC = 2.0 V 1.8 2.0 - V
lO = 100 A; VCC = 2.7 V 2.5 2.7 - V
lO = 100 A; VCC = 3.0 V 2.8 3.0 - V
lO = 100 A; VCC = 4.5 V 4.3 4.5 - V
lO = 6 mA; VCC = 3.0 V 2.40 2.82 - V
lO = 12 mA; VCC = 4.5 V 3.60 4.20 - V
VOL LOW-level output voltage VI = VIH or VIL
IO = 100 A; VCC = 1.2 V - 0 - V
IO = 100 A; VCC = 2.0 V - 0 0.2 V
IO = 100 A; VCC = 2.7 V - 0 0.2 V
IO = 100 A; VCC = 3.0 V - 0 0.2 V
IO = 100 A; VCC = 4.5 V - 0 0.2 V
IO = 6 mA; VCC = 3.0 V - 0.25 0.40 V
IO = 12 mA; VCC = 4.5 V - 0.35 0.55 V
IIinput leakage current VI = VCC or GND; VCC = 5.5 V - - 1.0 A
ICC supply current VI = VCC or GND; IO = 0 A; VCC = 5.5 V - - 20.0 A
ICC additional supply current VI = VCC 0.6 V; VCC = 2.7 V to 3.6 V - - 500 A
CIinput capacitance - 3.5 - pF
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 9 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
[1] All typical values are measured at Tamb = 25 C.
Tamb = 40 C to +125 C
VIH HIGH-level input voltage VCC = 1.2 V 0.9 - - V
VCC = 2.0 V 1.4 - - V
VCC = 2.7 V to 3.6 V 2.0 - - V
VCC = 4.5 V to 5.5 V 0.7 VCC --V
VIL LOW-level input voltage VCC = 1.2 V - - 0.3 V
VCC = 2.0 V - - 0.6 V
VCC = 2.7 V to 3.6 V - - 0.8 V
VCC = 4.5 V to 5.5 V - - 0.3 VCC V
VOH HIGH-level output voltage VI = VIH or VIL
lO = 100 A; VCC = 1.2 V - - - V
lO = 100 A; VCC = 2.0 V 1.8 - - V
lO = 100 A; VCC = 2.7 V 2.5 - - V
lO = 100 A; VCC = 3.0 V 2.8 - - V
lO = 100 A; VCC = 4.5 V 4.3 - - V
lO = 6 mA; VCC = 3.0 V 2.2 - - V
lO = 12 mA; VCC = 4.5 V 3.5 - - V
VOL LOW-level output voltage VI = VIH or VIL
IO = 100 A; VCC = 1.2 V - - - V
IO = 100 A; VCC = 2.0 V - - 0.2 V
IO = 100 A; VCC = 2.7 V - - 0.2 V
IO = 100 A; VCC = 3.0 V - - 0.2 V
IO = 100 A; VCC = 4.5 V - - 0.2 V
IO = 6 mA; VCC = 3.0 V - - 0.5 V
IO = 12 mA; VCC = 4.5 V - - 0.65 V
IIinput leakage current VI = VCC or GND; VCC = 5.5 V - - 1.0 A
ICC supply current VI = VCC or GND; IO = 0 A; VCC = 5.5 V - - 160 A
ICC additional supply current VI = VCC 0.6 V ; VCC = 2.7 V to 3.6 V - - 850 A
Table 6. Static characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ[1] Max Unit
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 10 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7. Dynamic characteristics
GND = 0 V; tr = tf
2.5 ns; for test circuit see Figure 8.
Symbol Parameter Conditions 40 C to +85 C40 C to +125 CUnit
Min Typ[1] Max Min Max
Propagation delay; see Figure 7
tpd propagation
delay nRD, nA and nB to nQ [2]
VCC = 1.2 V - 120 - - - ns
VCC = 2.0 V - 40 76 - 92 ns
VCC = 2.7 V - 30 56 - 68 ns
VCC = 3.0 V to 3.6 V - 25 48 - 57 ns
VCC = 4.5 V to 5.5 V - 18 40 - 46 ns
nRD to nQ (reset) [2]
VCC = 1.2 V - 100 - - - ns
VCC = 2.0 V - 30 57 - 68 ns
VCC = 2.7 V - 23 43 - 51 ns
VCC = 3.0 V to 3.6 V - 20 38 - 45 ns
VCC = 4.5 V to 5.5 V - 14 31 - 36 ns
Inputs nA, nB and nRD; see Figure 7
tWpulse width nA = LOW
VCC = 2.0 V 30 5 - 40 - ns
VCC = 2.7 V 25 3.5 - 30 - ns
VCC = 3.0 V to 3.6 V 20 3.0 - 25 - ns
VCC = 4.5 V to 5.5 V 15 2.5 - 20 - ns
nB = HIGH
VCC = 2.0 V 30 13 - 40 - ns
VCC = 2.7 V 25 8 - 30 - ns
VCC = 3.0 V to 3.6 V 20 7 - 25 - ns
VCC = 4.5 V to 5.5 V 15 5 - 20 - ns
nRD = LOW; see Figure 13
VCC = 2.0 V 35 6 - 45 - ns
VCC = 2.7 V 30 5 - 40 - ns
VCC = 3.0 V to 3.6 V 25 4 - 30 - ns
VCC = 4.5 V to 5.5 V 20 3 - 25 - ns
trtrig retrigger time nB to nA; see Figure 12
VCC = 2.0 V - 70 - - - ns
VCC = 2.7 V - 55 - - - ns
VCC = 3.0 V to 3.6 V - 45 - - - ns
VCC = 4.5 V to 5.5 V - 40 - - - ns
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 11 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
[1] All typical values are measured at Tamb = 25 C and nominal supply values (VCC = 3.3 V and 5.0 V).
[2] tpd is the same as tPLH and tPHL; CEXT = 0 pF; REXT =5 k.
[3] For other REXT and CEXT combinations see Figure 11 and Section 12.1.1 “Basic timing”.
[4] CEXT has no limits.
[5] CPD is used to determine the dynamic power dissipation (PD in W).
PD=C
PD VCC2fiN+(CLVCC2fo) where:
fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
(CLVCC2fo) = sum of the outputs.
Outputs; nQ = LOW and nQ = HIGH, see Figure 7
tWpulse width CEXT = 100 nF; REXT = 10 k
VCC = 2.0 V -470- - -ns
VCC = 2.7 V - 460 - - - ns
VCC = 3.0 V to 3.6 V - 450 - - - ns
VCC = 4.5 V to 5.5 V - 430 - - - ns
CEXT = 0 pF; REXT = 5 k
VCC = 2.0 V - 100 - - - ns
VCC = 2.7 V - 90 - - - ns
VCC = 3.0 V to 3.6 V - 80 - - - ns
VCC = 4.5 V to 5.5 V - 70 - - - ns
External components
REXT external
resistance see Figure 11 [3]
VCC = 1.2 V 10 - 1000 - - k
VCC = 2.0 V 5 - 1000 - - k
VCC = 2.7 V 3 - 1000 - - k
VCC = 3.0 V to 3.6 V 2 - 1000 - - k
VCC = 4.5 V to 5.5 V 2 - 1000 - - k
CEXT external
capacitance see Figure 11 [3]
[4]
VCC = 1.2 V - - - - - pF
VCC = 2.0 V - - - - - pF
VCC = 2.7 V - - - - - pF
VCC = 3.0 V to 3.6 V - - - - - pF
VCC = 4.5 V to 5.5 V - - - - - pF
Dynamic power dissipation
CPD power
dissipation
capacitance
VCC =3.3V; V
I = GND to VCC [5] -60- - -pF
Table 7. Dynamic characteristics …continued
GND = 0 V; tr = tf
2.5 ns; for test circuit see Figure 8.
Symbol Parameter Conditions 40 C to +85 C40 C to +125 CUnit
Min Typ[1] Max Min Max
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 12 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
11. Waveforms
Measurement points are given in Table 8.
Fig 7. Propagation delays from inputs (nA, nB, nRD) to outputs (nQ, nQ)
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VCC VM
2.7 V 1.5 V
< 2.7 V 0.5 VCC
Test data is given in Table 9.
Definitions for test circuit:
RL = Load resistance.
CL = Load capacitance including jig and probe capacitance.
RT = Termination resistance should be equal to Zo of the pulse generator.
Fig 8. Test circuit for measuring switching times
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 13 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
12. Application information
12.1 Timing components
12.1.1 Basic timing
The basic output pulse wid th is essentially determined by the values of the external timing
component s REXT and CEXT.
If CEXT > 10 nF, the following formula is valid: tW = K REXT CEXT (typ.) where:
tW = output pulse width in ns
REXT = external resistor in k
CEXT = external capacitor in pF
K = constant: this is 0.45 for VCC = 5.0 V and 0.48 for VCC = 2.0 V (see Figure 10)
The inherent test jig and pin capacitance at pin 15 and pin 7 (nREXT/CEXT) is
approximately 7 pF.
Table 9. Test data
Supply voltage Input Load Test
VCC VItr, tfCLRL
< 2.7 V VCC 2.5 ns 5 0 pF 1 ktPHL, tPLH
2.7 V to 3.6 V 2.7 V 2.5 ns 50 pF 1 ktPHL, tPLH
4.5 V VCC 2.5 ns 50 pF 1 ktPHL, tPLH
(1) For minimum noise generation it is recommended to ground pins 6 (2CEXT) and 14 (1CEXT)
externally to pin 8 (GND).
Fig 9. Timing components connections
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 14 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
12.1.2 Retrigger timing
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 pulses meets the minimum retrigger time. If CEXT > 10 pF, the
next formula for the set-up time of a retrigger pulse is valid:
at VCC = 5.0 V: trtrig = 30 + 0.19REXT CEXT0.9 + 13 REXT1.05 (typ.)
at VCC = 3.0 V: trtrig = 41 + 0.15REXT CEXT0.9 1 REXT (typ.)
where:
trtrig = retrigger time in ns
CEXT = external capacitor in pF
REXT = external resistor in k
CEXT =10nF; R
EXT = 10 k to 100 k VCC = 3.3 V and Tamb = 25 C
Fig 10. Typical ‘K’ facto r as a fun ction of VCC Fig 11. Typical output pulse width as a function of the
external ca pacitance values
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 15 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
12.1.3 Reset timing
12.2 Power considerations
12.2.1 Power-up
When the monostable multivibrator 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 RC circuit on pin nRD shown in Figure 14.
12.2.2 Power-down
A large capacitor (CEXT) may cause problems when powering-down the monostable due
to the energy stored in this cap acitor. When a system containing this device is
powered-down or a r apid 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, connect a damping diode DEXT (preferably a germanium or Schottky type
diode) able to withstand large current surges - see Figure 14.
nA = LOW
Fig 13. Output pulse control using reset input nRD
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 16 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
13. Package outline
Fig 15. Package outline SOT109-1 (SO16)
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 17 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
Fig 16. Package outline SOT338-1 (SSOP16)
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 18 of 23
Nexperia 74LV123
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74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 19 of 23
Nexperia 74LV123
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© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 20 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
14. Abbreviations
15. Revision history
Table 10. Abbreviations
Acronym Description
CMOS Complementary Metal Oxide Semiconductor
DUT Device Under Test
Table 11. Revision history
Document ID Release date Data sheet status Change notice Supersedes
74LV123 v.8 20160304 Product data sheet - 74LV123 v.7
Modifications: •Type numbers 74LV1 23N (SOT38-4) removed.
74LV123 v.7 20111212 Product data sheet - 74LV123 v.6
Modifications: •Legal pages updated.
74LV123 v.6 2011082 6 Produ ct data sheet - 74LV123 v.5
74LV123 v.5 2007110 8 Produ ct data sheet - 74LV123 v.4
74LV12 3 v.4 20070919 Product specification - 74LV123 v.3
74LV12 3 v.3 20030313 Product specification - 74LV123 v.2
74LV12 3 v.2 19980420 Product specification - 74LV123 v.1
74LV123 v.1 19970204 Product specification - -
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 21 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
16. Legal information
16.1 Data sheet status
[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) descr ibed in th is document m ay have cha nged since thi s document w as publish ed and may di ffe r in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nexperia.com.
16.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liab ility 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 tit le. A short data sh eet is intended
for quick reference only and shou ld not b e relied u pon to cont ain det ailed 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 pre va il.
Product specificat ion — 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 off er functions and qualities beyond those described in the
Product data sheet.
16.3 Disclaimers
Limited warr a nty and liability — Information in this document is believed to
be accurate and reliable. However, Nexperia does not give any
representations or warrant ies, 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 consequ ential damages (including - wit hout 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 descripti ons, at any time and without
notice. This document supersedes and replaces all informa tion 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 a Nexperia product can reasonably be expected
to result in perso nal 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 ther efore such inclu sion and/or use is at the cu stomer’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 ope ration 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 fo r the planned application and use of
customer’s third party customer(s). Custo mers 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 appl ication or use by customer’s
third party custo mer(s). Customer is responsible for doing all necessa ry
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 individua l 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 i n this document may be interpreted or
construed as an of fer t o sell product s that is open for accept ance or the gr ant,
conveyance or implication of any license under any copyrights, patents or
other industrial or inte llectual property right s.
Document status[1][2] Product status[3] Definition
Objective [short] data sheet Development This document cont ains data from the objective specification for product development.
Preliminary [short] dat a sheet Qualification This document contains data from the preliminary specificat ion.
Product [short] data sheet Production This document contains the product specification.
© Nexperia B.V. 2017. All rights reserved
74LV123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 8 — 4 March 2016 22 of 23
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified,
the product is not suitable for automotive use. It i s neit her qua lif ied nor test ed
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 automot ive specifications and standards, custome r
(a) shall use the product without Nexperia’s warranty of the
product for such au tomotive applications, use and specifica tions, 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 custome r 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.
16.4 Trademarks
Notice: All referenced b rands, produc t names, service names and trademarks
are the property of their respective ow ners.
17. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Nexperia 74LV123
Dual retriggerable monostable multivibrator with reset
18. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 2
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 5
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
6 Functional description . . . . . . . . . . . . . . . . . . . 6
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 7
8 Recommended operating conditions. . . . . . . . 7
9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 8
10 Dynamic characteristics . . . . . . . . . . . . . . . . . 10
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
12 Application information. . . . . . . . . . . . . . . . . . 13
12.1 Timing components . . . . . . . . . . . . . . . . . . . . 13
12.1.1 Basic timing . . . . . . . . . . . . . . . . . . . . . . . . . . 13
12.1.2 Retrigger timing . . . . . . . . . . . . . . . . . . . . . . . 14
12.1.3 Reset timing . . . . . . . . . . . . . . . . . . . . . . . . . . 15
12.2 Power considerations. . . . . . . . . . . . . . . . . . . 15
12.2.1 Power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
12.2.2 Power-down . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16
14 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 20
15 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 20
16 Legal information. . . . . . . . . . . . . . . . . . . . . . . 21
16.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 21
16.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
17 Contact information. . . . . . . . . . . . . . . . . . . . . 22
18 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
© 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:
04 March 2016
