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74LV123DB

Dual retriggerable monostable multivibrator with reset

The 74LV123 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. Control inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess VCC. Schmitt-trigger action at nA and nB inputs makes the circuit tolerant of slower input rise and fall times.

Not recommended for new designs (NRND).

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors

Features and benefits

  • Wide supply voltage range from 1.0 V to 5.5 V
  • CMOS low power dissipation
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Optimized for low-voltage applications: 1.0 V to 3.6 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-level output voltage (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 terminates output pulses
  • Schmitt-trigger action on all inputs except for the reset input
  • Complies with JEDEC standards:
    • JESD8-7 (1.65 V to 1.95 V)
    • JESD8-5 (2.3 V to 2.7 V)
    • JESD8C (2.7 V to 3.6 V)
    • JESD36 (4.5 V to 5.5 V)
  • 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

Applications

Parametrics

Type numberProduct statusPackage name
74LV123DB
NRND
End of lifeSSOP16

Package

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74LV123DB
NRND
74LV123DB,118
( 9352 102 60118 )
Discontinued / End-of-lifeLV123
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1

Discontinuation information

Type numberOrderable part numberOrdering codeLast time buy dateLast time delivery dateReplacement productStatusComments
74LV123DB
NRND
74LV123DB,1189352102601182021-12-312022-06-3074LV123PWVersion withdrawal

Quality, reliability & chemical content

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74LV123DB
NRND
74LV123DB,11874LV123DB11
Quality and reliability disclaimer

Documentation (4)

File nameTitleTypeDate
74LV123Dual retriggerable monostable multivibrator with resetData sheet2021-09-22
lvlv Spice modelSPICE model2013-05-06
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08

Support

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Models

File nameTitleTypeDate
lvlv Spice modelSPICE model2013-05-06