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74LVC244A; 74LVCH244A

Octal buffer/line driver; 3-state

The 74LVC244A; 74LVCH244A are 8-bit buffer/line drivers with 3-state outputs. The devices can be used as two 4-bit buffers or one 8-bit buffer. Both devices features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. 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.

This device is fully specified for partial power down applications using IOFF. The IOFF circuitry disables the output, preventing the potentially damaging backflow current through the device when it is powered down.

Features and benefits

  • Wide supply voltage range from 1.2 V to 3.6 V

  • CMOS low-power consumption

  • Direct interface with TTL levels

  • Overvoltage tolerant inputs to 5.5 V

  • IOFF circuitry provdes partial Power-down mode operation

  • Bus hold on all data inputs (74LVCH244A only)

  • 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)Logic switching levelsOutput drive capability (mA)fmax (MHz)Nr of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Rth(j-c) (K/W)Package name
74LVC244ABQProduction1.2 - 3.6CMOS/LVTTL± 241758low-40~1257950DHVQFN20
74LVC244ABZProduction1.2 - 3.6CMOS/LVTTL± 241758low-40~1258654.3DHXQFN20
74LVC244ADProduction1.2 - 3.6CMOS/LVTTL± 241758low-40~125858SO20
74LVC244APWProduction1.2 - 3.6CMOS/LVTTL± 241758low-40~12510145TSSOP20
74LVCH244ABQProduction1.2 - 3.6CMOS/LVTTL± 241758low-40~1257850DHVQFN20
74LVCH244ADProduction1.2 - 3.6CMOS/LVTTL± 241758low-40~1258561SO20
74LVCH244APWProduction1.2 - 3.6CMOS/LVTTL± 241758low-40~12510145TSSOP20

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74LVC244ABQ
DHVQFN20
(SOT764-1) 		SOT764-1SOT764-1_115ActiveLVC244A LVC244A Standard Procedure Standard Procedure74LVC244ABQ,115
( 9352 725 05115 )
74LVC244ABZ
DHXQFN20
(SOT8020-1) 		SOT8020-1SOT8020-1_115ActiveVC24474LVC244ABZX
( 9356 911 44115 )
74LVC244AD
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_118Active74LVC244AD 74LVC244AD Standard Procedure Standard Procedure74LVC244AD,118
( 9352 104 00118 )
74LVC244APW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_118ActiveLVC244A74LVC244APW,118
( 9352 104 20118 )
74LVCH244ABQ
DHVQFN20
(SOT764-1) 		SOT764-1SOT764-1_115ActiveLVCH244A74LVCH244ABQ,115
( 9352 754 18115 )
74LVCH244AD
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_118Active74LVCH244AD74LVCH244AD,118
( 9352 103 30118 )
74LVCH244APW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_118ActiveVCH244A74LVCH244APW,118
( 9352 103 50118 )

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))
74LVC244AD
SO20
(SOT163-1) 		SOT163-1WAVE_BG-BD-1
SOT163-1_112Withdrawn / End-of-life74LVC244AD 74LVC244AD Standard Procedure Standard Procedure74LVC244AD,112
( 9352 104 00112 )
74LVC244APW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_112Withdrawn / End-of-lifeLVC244A74LVC244APW,112
( 9352 104 20112 )
74LVCH244APW
TSSOP20
(SOT360-1) 		SOT360-1SSOP-TSSOP-VSO-WAVE
SOT360-1_112Withdrawn / End-of-lifeVCH244A74LVCH244APW,112
( 9352 103 50112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74LVC244AD9352104001122021-12-312022-06-3074LVC244AD
    74LVC244APW9352104201122021-12-312022-06-3074LVC244APW
      74LVCH244AD9352103301122021-12-312022-06-3074LVCH244AD
        74LVCH244APW9352103501122021-12-312022-06-3074LVCH244APW

          Environmental information

          Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
          74LVC244ABQ74LVC244ABQ,11574LVC244ABQweek 13, 2005
          74LVC244ABZ74LVC244ABZX74LVC244ABZ
          74LVC244AD74LVC244AD,11874LVC244ADweek 30, 2004
          74LVC244APW74LVC244APW,11874LVC244APWweek 7, 2005
          74LVCH244ABQ74LVCH244ABQ,11574LVCH244ABQAlways Pb-free
          74LVCH244AD74LVCH244AD,11874LVCH244ADweek 30, 2004
          74LVCH244APW74LVCH244APW,11874LVCH244APWweek 7, 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
          74LVC244AD74LVC244AD,11274LVC244ADweek 30, 2004
          74LVC244APW74LVC244APW,11274LVC244APWweek 7, 2005
          74LVCH244APW74LVCH244APW,11274LVCH244APWweek 7, 2005
          Quality and reliability disclaimer

          Documentation (12)

          File nameTitleTypeDate
          74LVC_LVCH244AOctal buffer/line driver; 3-stateData sheet2023-08-08
          AN263Power considerations when using CMOS and BiCMOS logic devicesApplication note2023-02-07
          AN11009Pin FMEA for LVC familyApplication note2019-01-09
          lvc244alvc244a IBIS modelIBIS model2021-02-02
          lvch244alvch244a IBIS modelIBIS model2013-04-07
          lvclvc Spice modelSPICE model2013-05-06
          SOT8020-1plastic, leadless dual in-line compatible thermal enhanced extreme thin quad flat package;no leads; 20 terminals; 0.4 mm pitch; body 2 mm x 3.2 mm x 0.48 mmPackage information2023-02-28
          SOT764-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 4.5 mm x 2.5 mm x 1 mm bodyPackage information2022-06-21
          SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
          SOT360-1plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm bodyPackage information2022-06-21
          SOT163-1plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm bodyPackage information2022-06-20
          WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08

          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
          lvc244alvc244a IBIS modelIBIS model2021-02-02
          lvch244alvch244a IBIS modelIBIS model2013-04-07
          lvclvc Spice modelSPICE model2013-05-06

          Ordering, pricing & availability

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