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74HC74; 74HCT74

Dual D-type flip-flop with set and reset; positive edge-trigger

The 74HC74 and 74HCT74 are dual positive edge triggered D-type flip-flop. They have individual data (nD), clock (nCP), set (nSD) and reset (nRD) inputs, and complementary nQ and nQ outputs. Data at the nD-input, that meets the set-up and hold time requirements on the LOW-to-HIGH clock transition, is stored in the flip-flop and appears at the nQ output. Schmitt-trigger action in the clock input, makes the circuit highly tolerant to slower clock rise and fall times. Inputs include clamp diodes that enable 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 to 6.0 V
  • CMOS low power dissipation
  • High noise immunity
  • Input levels:
    • For 74HC74: CMOS level
    • For 74HCT74: TTL level
  • Symmetrical output impedance
  • High noise immunity
  • Balanced propagation delays
  • 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)
  • 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

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)fmax (MHz)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC74BQProduction2.0 - 6.0CMOS± 5.21482low-40~12510620.974DHVQFN14
74HC74DProduction2.0 - 6.0CMOS± 5.21482low-40~12510820.166SO14
74HC74PWProduction2.0 - 6.0CMOS± 5.21482low-40~1251417.867TSSOP14
74HCT74BQProduction4.5 - 5.5TTL± 41559low-40~12510620.974DHVQFN14
74HCT74DProduction4.5 - 5.5TTL± 41559low-40~12510820.166SO14
74HCT74PWProduction4.5 - 5.5TTL± 41559low-40~1251417.867TSSOP14

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC74BQ
DHVQFN14
(SOT762-1)
SOT762-1Reel 7” Q1/T1 or Q2/T3ActiveHC7474HC74BQ,115
( 9352 736 72115 )
74HC74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC74D74HC74D,653
( 9337 133 80653 )
74HC74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC7474HC74PW,118
( 9351 751 30118 )
74HCT74BQ
DHVQFN14
(SOT762-1)
SOT762-1Reel 7” Q1/T1 or Q2/T3ActiveHCT7474HCT74BQ,115
( 9352 736 15115 )
74HCT74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT74D74HCT74D,653
( 9337 133 90653 )
74HCT74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT7474HCT74PW,118
( 9351 751 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))
74HC74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack, CECCDiscontinued / End-of-life74HC74D74HC74D,652
( 9337 133 80652 )
74HC74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeHC7474HC74PW,112
( 9351 751 30112 )
74HCT74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack, CECCDiscontinued / End-of-life74HCT74D74HCT74D,652
( 9337 133 90652 )
74HCT74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeHCT7474HCT74PW,112
( 9351 751 50112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC74D933713380652
74HC74PW935175130112
74HCT74D933713390652
74HCT74PW935175150112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC74BQ74HC74BQ,11574HC74BQAlways Pb-free29.90.91.11E911
74HC74D74HC74D,65374HC74Dweek 13, 200529.90.91.11E911
74HC74PW74HC74PW,11874HC74PWweek 10, 200529.90.91.11E911
74HCT74BQ74HCT74BQ,11574HCT74BQAlways Pb-free29.90.91.11E911
74HCT74D74HCT74D,65374HCT74Dweek 30, 200429.90.91.11E911
74HCT74PW74HCT74PW,11874HCT74PWweek 10, 200529.90.91.11E911

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

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC74D74HC74D,65274HC74Dweek 13, 200529.90.91.11E911
74HC74PW74HC74PW,11274HC74PWweek 10, 200529.90.91.11E911
74HCT74D74HCT74D,65274HCT74Dweek 30, 200429.90.91.11E911
74HCT74PW74HCT74PW,11274HCT74PWweek 10, 200529.90.91.11E911
Quality and reliability disclaimer

Documentation (11)

File nameTitleTypeDate
74HC_HCT74Dual D-type flip-flop with set and reset; positive edge-triggerData sheet2021-09-13
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hchc Spice modelSPICE model2013-05-06
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; 3 mm x 2.5 mm x 1 mm bodyPackage information2021-08-17
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 1.1 mm bodyPackage information2020-04-21
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SOT108-1plastic, small outline package; 14 leads; 1.27 mm pitch; 8.65 mm x 3.9 mm x 1.75 mm bodyPackage information2021-01-06
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08

Support

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Models

File nameTitleTypeDate
hchc Spice modelSPICE model2013-05-06

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