74HC(T)74

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

  • Input levels:
    • For 74HC74: CMOS level
    • For 74HCT74: TTL level
  • Symmetrical output impedance
  • Low power dissipation
  • High noise immunity
  • Balanced propagation delays
  • Specified in compliance with JEDEC standard no. 7A
  • 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
74HC74DB
NRND
Not for design in2.0 - 6.0CMOS+/- 5.21482low-40~12515640.0SSOP14
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
74HCT74DB
NRND
Not for design in4.5 - 5.5TTL+/- 41559low-40~12515640.0SSOP14
74HCT74PWProduction4.5 - 5.5TTL± 41559low-40~1251417.867TSSOP14

Package

Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC74BQ
DHVQFN14
(SOT762-1)
SOT762-1Reel 7" Q1/T1ActiveHC7474HC74BQ,115
( 9352 736 72115 )
74HC74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC74D74HC74D,653
( 9337 133 80653 )
Bulk Pack, CECCActive74HC74D74HC74D,652
( 9337 133 80652 )
74HC74DB
NRND

SSOP14
(SOT337-1)
SOT337-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC7474HC74DB,118
( 9351 751 70118 )
Bulk PackActiveHC7474HC74DB,112
( 9351 751 70112 )
74HC74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC7474HC74PW,118
( 9351 751 30118 )
Bulk PackActiveHC7474HC74PW,112
( 9351 751 30112 )
74HCT74BQ
DHVQFN14
(SOT762-1)
SOT762-1Reel 7" Q1/T1ActiveHCT7474HCT74BQ,115
( 9352 736 15115 )
74HCT74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT74D74HCT74D,653
( 9337 133 90653 )
Bulk Pack, CECCActive74HCT74D74HCT74D,652
( 9337 133 90652 )
74HCT74DB
NRND

SSOP14
(SOT337-1)
SOT337-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT7474HCT74DB,118
( 9351 751 80118 )
Bulk PackActiveHCT7474HCT74DB,112
( 9351 751 80112 )
74HCT74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT7474HCT74PW,118
( 9351 751 50118 )
Bulk PackActiveHCT7474HCT74PW,112
( 9351 751 50112 )

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

Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HCT74D/S242
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1Withdrawn / End-of-lifeStandard Marking74HCT74D/S242,118
( 9350 485 70118 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC74D/S242935040540118
74HCT74D/S242935048570118
74HCT74D/S242935048570112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC74BQ74HC74BQ,11574HC74BQAlways Pb-free84.96.621.51E811
74HC74D74HC74D,65374HC74Dweek 13, 200584.96.621.51E811
74HC74D74HC74D,65274HC74Dweek 13, 200584.96.621.51E811
74HC74DB
NRND
74HC74DB,11874HC74DBweek 12, 200511
74HC74DB
NRND
74HC74DB,11274HC74DBweek 12, 200511
74HC74PW74HC74PW,11874HC74PWweek 10, 200584.96.621.51E811
74HC74PW74HC74PW,11274HC74PWweek 10, 200584.96.621.51E811
74HCT74BQ74HCT74BQ,11574HCT74BQAlways Pb-free84.96.621.51E811
74HCT74D74HCT74D,65374HCT74Dweek 30, 200484.96.621.51E811
74HCT74D74HCT74D,65274HCT74Dweek 30, 200484.96.621.51E811
74HCT74DB
NRND
74HCT74DB,11874HCT74DBweek 12, 200511
74HCT74DB
NRND
74HCT74DB,11274HCT74DBweek 12, 200511
74HCT74PW74HCT74PW,11874HCT74PWweek 10, 200584.96.621.51E811
74HCT74PW74HCT74PW,11274HCT74PWweek 10, 200584.96.621.51E811

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
74HCT74D/S24274HCT74D/S242,118notAvailable84.96.621.51E811
Quality and reliability disclaimer

Documentation (22)

File nameTitleTypeDate
74HC_HCT74Dual D-type flip-flop with set and reset; positive edge-triggerData sheet2017-03-30
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
hchc Spice modelSPICE model2013-05-06
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SOT337-1_118Standard product orientation 12NC ending 118Packing2013-04-04
SOT337-1plastic, shrink small outline package; 14 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm bodyOutline drawing2018-10-18
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT762-1_471DHVQFN14; Reel sulfur barrier pack, SMD, 7" Q1/T1 standard product orientation Orderable part number ending ,471 or Z Ordering code (12NC) ending 471Packing2016-01-21
SOT762-1_115Standard product orientation 12NC ending 115Packing2013-04-09
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 bodyOutline drawing2018-11-14
SOT402-1_623TSSOP14; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 623 or XP; Ordering code (12NC) ending 623Packing2013-05-15
SOT402-1_653TSSOP14; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 653 or HL; Ordering code (12NC) ending 653Packing2013-05-15
SOT402-1plastic, thin shrink small outline package; 14 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-10-18
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT402-1_118TSSOP14; Reel pack for SMD, 13"; Q1/T1 product orientationPacking2019-11-29
SOT108-1_431SO14; Reel sulfur barrier pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-11-24
SOT108-1_118SO14; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-08
SOT108-1plastic, small outline package; 14 leads; 1.27 mm pitch; 8.65 mm x 3.9 mm x 1.75 mm bodyOutline drawing2018-10-18
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08

Support

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Models

File nameTitleTypeDate
hchc Spice modelSPICE model2013-05-06

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