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74HC27; 74HCT27

Triple 3-input NOR gate

The 74HC27; 74HCT27 is a triple 3-input NOR gate. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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 74HC27: CMOS level

    • For 74HCT27: TTL level

  • ESD protection:

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

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

  • Multiple package options

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

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)fmax (MHz)Nr of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC27BQProduction2.0 - 6.0CMOS± 5.28.0363low-40~12510721.775DHVQFN14
74HC27DProduction2.0 - 6.0CMOS± 5.28.0363low-40~12510920.968SO14
74HC27PWProduction2.0 - 6.0CMOS± 5.28.0363low-40~1251428.168TSSOP14
74HCT27BQProduction4.5 - 5.5TTL± 410363low-40~12510721.775DHVQFN14
74HCT27DProduction4.5 - 5.5TTL± 410363low-40~12510920.968SO14
74HCT27PWProduction4.5 - 5.5TTL± 410363low-40~1251428.168TSSOP14

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC27BQ
DHVQFN14
(SOT762-1) 		SOT762-1SOT762-1_115ActiveHC2774HC27BQ,115
( 9352 836 78115 )
74HC27D
SO14
(SOT108-1) 		SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT108-1_653Active74HC27D74HC27D,653
( 9337 141 70653 )
74HC27PW
TSSOP14
(SOT402-1) 		SOT402-1SSOP-TSSOP-VSO-WAVE
SOT402-1_118ActiveHC2774HC27PW,118
( 9351 890 10118 )
74HCT27BQ
DHVQFN14
(SOT762-1) 		SOT762-1SOT762-1_115ActiveHCT2774HCT27BQ,115
( 9352 836 79115 )
74HCT27D
SO14
(SOT108-1) 		SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT108-1_653Active74HCT27D74HCT27D,653
( 9337 141 80653 )
74HCT27PW
TSSOP14
(SOT402-1) 		SOT402-1SSOP-TSSOP-VSO-WAVE
SOT402-1_118ActiveHCT2774HCT27PW,118
( 9351 895 80118 )

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))
74HC27D
SO14
(SOT108-1) 		SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT108-1_652Withdrawn / End-of-life74HC27D74HC27D,652
( 9337 141 70652 )
74HC27PW
TSSOP14
(SOT402-1) 		SOT402-1SSOP-TSSOP-VSO-WAVE
SOT402-1_112Withdrawn / End-of-lifeHC2774HC27PW,112
( 9351 890 10112 )
74HCT27D
SO14
(SOT108-1) 		SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT108-1_652Withdrawn / End-of-life74HCT27D74HCT27D,652
( 9337 141 80652 )
74HCT27PW
TSSOP14
(SOT402-1) 		SOT402-1SSOP-TSSOP-VSO-WAVE
SOT402-1_112Withdrawn / End-of-lifeHCT2774HCT27PW,112
( 9351 895 80112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC27D9337141706522021-12-312022-06-3074HC27D
    74HC27PW9351890101122021-12-312022-06-3074HC27PW
      74HCT27D9337141806522021-12-312022-06-3074HCT27D
        74HCT27PW9351895801122021-12-312022-06-3074HCT27PW

          Environmental information

          Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
          74HC27BQ74HC27BQ,11574HC27BQAlways Pb-free
          74HC27D74HC27D,65374HC27Dweek 5, 2004
          74HC27PW74HC27PW,11874HC27PWweek 10, 2005
          74HCT27BQ74HCT27BQ,11574HCT27BQAlways Pb-free
          74HCT27D74HCT27D,65374HCT27Dweek 5, 2004
          74HCT27PW74HCT27PW,11874HCT27PWweek 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
          74HC27D74HC27D,65274HC27Dweek 5, 2004
          74HC27PW74HC27PW,11274HC27PWweek 10, 2005
          74HCT27D74HCT27D,65274HCT27Dweek 5, 2004
          74HCT27PW74HCT27PW,11274HCT27PWweek 10, 2005
          Quality and reliability disclaimer

          Documentation (10)

          File nameTitleTypeDate
          74HC_HCT27Triple 3-input NOR gateData sheet2024-03-25
          AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
          HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
          SOT762-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 14 terminals; 0.5 mm pitch; 2.5 x 3 x 1 mm bodyPackage information2023-04-05
          SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
          SOT402-1plastic, thin shrink small outline package; 14 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.2 mm bodyPackage information2023-11-07
          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
          SOT108-1plastic, small outline package; 14 leads; 1.27 mm pitch; 8.65 mm x 3.9 mm x 1.75 mm bodyPackage information2023-11-07

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