Nexperia
Or cross multiple parts
×

74LVC161

Presettable synchronous 4-bit binary counter; asynchronous reset

The 74LVC161 is a synchronous presettable binary counter with an internal look-head carry. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (CP). The outputs (Q0 to Q3) of the counters may be preset HIGH or LOW. A LOW at the parallel enable input (PE) disables the counting action and causes the data at the data inputs (D0 to D3) to be loaded into the counter on the positive-going edge of the clock. Preset takes place regardless of the levels at count enable inputs (CEP and CET). A LOW at the master reset input (MR) sets Q0 to Q3 LOW regardless of the levels at input pins CP, PE, CET and CEP (thus providing an asynchronous clear function). The look-ahead carry simplifies serial cascading of the counters. Both CEP and CET must be HIGH to count. The CET input is fed forward to enable the terminal count output (TC). The TC output thus enabled will produce a HIGH output pulse of a duration approximately equal to a HIGH output of Q0. This pulse can be used to enable the next cascaded stage.

Inputs can be driven from either 3.3 V or 5 V devices. This feature allows the use of these devices as translators in mixed 3.3 V and 5 V environments.

Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times.

Features and benefits

  • Overvoltage tolerant inputs to 5.5 V

  • Wide supply voltage range from 1.2 V to 3.6 V

  • CMOS low power dissipation

  • Direct interface with TTL levels

  • Asynchronous reset

  • Synchronous counting and loading

  • Two count enable inputs for n-bit cascading

  • Positive edge-triggered clock

  • Complies with JEDEC standard:

    • JESD8-7A (1.65 V to 1.95 V)

    • JESD8-5A (2.3 V to 2.7 V)

    • JESD8-C/JESD36 (2.7 V to 3.6 V)

  • ESD protection:

    • HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

    • CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V

  • Specified from -40 °C to +85 °C and -40 °C to +125 °C

Parametrics

Type numberProduct statusVCC (V)Output drive capability (mA)Logic switching levelstpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74LVC161BQProduction1.2 - 3.6± 24CMOS/LVTTL4.9low-40~1259313.862DHVQFN16
74LVC161DProduction1.2 - 3.6± 24CMOS/LVTTL4.9low-40~125929.651.7SO16
74LVC161PWProduction1.2 - 3.6± 24CMOS/LVTTL4.9low-40~1251254.654.7TSSOP16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74LVC161BQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveLVC16174LVC161BQ,115
( 9352 756 12115 )
74LVC161D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_118Active74LVC161D74LVC161D,118
( 9352 105 10118 )
74LVC161PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveLVC16174LVC161PW,118
( 9352 105 30118 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74LVC161D
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_112Withdrawn / End-of-life74LVC161D74LVC161D,112
( 9352 105 10112 )
74LVC161PW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112Withdrawn / End-of-lifeLVC16174LVC161PW,112
( 9352 105 30112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74LVC161D9352105101122021-12-312022-06-3074LVC161D
    74LVC161PW9352105301122021-12-312022-06-3074LVC161PW

      Environmental information

      Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
      74LVC161BQ74LVC161BQ,11574LVC161BQAlways Pb-free
      74LVC161D74LVC161D,11874LVC161DAlways Pb-free
      74LVC161PW74LVC161PW,11874LVC161PWweek 10, 2005

      The variants in the table below are discontinued. See the table Discontinuation information for more information.

      Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
      74LVC161D74LVC161D,11274LVC161DAlways Pb-free
      74LVC161PW74LVC161PW,11274LVC161PWweek 10, 2005
      Quality and reliability disclaimer

      Documentation (13)

      File nameTitleTypeDate
      74LVC161Presettable synchronous 4-bit binary counter; asynchronous resetData sheet2024-02-12
      AN263Power considerations when using CMOS and BiCMOS logic devicesApplication note2023-02-07
      AN11009Pin FMEA for LVC familyApplication note2019-01-09
      lvc161lvc161 IBIS modelIBIS model2013-04-07
      Nexperia_Selection_guide_2023Nexperia Selection Guide 2023Selection guide2023-05-10
      lvclvc Spice modelSPICE model2013-05-06
      SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2023-05-11
      SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
      SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
      WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
      SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2023-11-07
      SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm bodyPackage information2023-11-08
      SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

      Support

      If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.

      Models

      File nameTitleTypeDate
      lvc161lvc161 IBIS modelIBIS model2013-04-07
      lvclvc Spice modelSPICE model2013-05-06

      Ordering, pricing & availability

      Sample

      As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

      Sample orders normally take 2-4 days for delivery.

      If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.