×

74AHC74; 74AHCT74

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

The 74AHC74; 74AHCT74 is a high-speed Si-gate CMOS device and is pin compatible with Low-Power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard No. 7-A.

The 74AHC74; 74AHCT74 is a dual positive-edge triggered, D-type flip-flop with individual data inputs (D), clock inputs (CP), set inputs (SD) and reset inputs (RD). It also has complementary outputs (Q and Q).

The set and reset are asynchronous active LOW inputs that operate independent of the clock input. Information on the data input is transferred to the Q output on the LOW to HIGH transition of the clock pulse. The data inputs must be stable one set-up time prior to the LOW to HIGH clock transition for predictable operation.

Schmitt-trigger action in the clock input makes the circuit highly tolerant to slower clock rise and fall times.

Features and benefits

  • Balanced propagation delays
  • All inputs have Schmitt-trigger actions
  • Inputs accept voltages higher than VCC
  • Input levels:
    • For 74AHC74: CMOS level
    • For 74AHCT74: TTL level
  • ESD protection:
    • HBM EIA/JESD22-A114E exceeds 2000 V
    • MM EIA/JESD22-A115-A exceeds 200 V
    • CDM EIA/JESD22-C101C 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)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHC74BQProduction2.0 - 5.5CMOS± 83.7170low-40~12510620.974DHVQFN14
74AHC74DProduction2.0 - 5.5CMOS± 83.7170low-40~12510820.166SO14
74AHC74PWProduction2.0 - 5.5CMOS± 83.7170low-40~1251417.868TSSOP14
74AHCT74BQProduction4.5 - 5.5TTL± 83.3160low-40~12510620.974DHVQFN14
74AHCT74DProduction4.5 - 5.5TTL± 83.3160low-40~12510820.166SO14
74AHCT74PWProduction4.5 - 5.5TTL± 83.3160low-40~1251417.868TSSOP14

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74AHC74BQ
DHVQFN14
(SOT762-1)
SOT762-1Reel 7” Q1/T1 or Q2/T3ActiveAHC7474AHC74BQ,115
( 9352 788 07115 )
74AHC74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1Active74AHC74D74AHC74D,118
( 9352 630 78118 )
74AHC74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveAHC7474AHC74PW,118
( 9352 630 79118 )
74AHCT74BQ
DHVQFN14
(SOT762-1)
SOT762-1Reel 7” Q1/T1 or Q2/T3ActiveAHT7474AHCT74BQ,115
( 9352 788 09115 )
74AHCT74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1Active74AHCT74D74AHCT74D,118
( 9352 630 76118 )
74AHCT74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveAHCT7474AHCT74PW,118
( 9352 630 77118 )

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))
74AHC74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk PackDiscontinued / End-of-life74AHC74D74AHC74D,112
( 9352 630 78112 )
74AHC74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeAHC7474AHC74PW,112
( 9352 630 79112 )
74AHCT74D
SO14
(SOT108-1)
SOT108-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk PackDiscontinued / End-of-life74AHCT74D74AHCT74D,112
( 9352 630 76112 )
74AHCT74PW
TSSOP14
(SOT402-1)
SOT402-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeAHCT7474AHCT74PW,112
( 9352 630 77112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74AHC74D935263078112
74AHC74PW935263079112
74AHCT74D935263076112
74AHCT74PW935263077112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74AHC74BQ74AHC74BQ,11574AHC74BQAlways Pb-free19.30.52E911
74AHC74D74AHC74D,11874AHC74Dweek 32, 200419.30.52E911
74AHC74PW74AHC74PW,11874AHC74PWweek 10, 200519.30.52E911
74AHCT74BQ74AHCT74BQ,11574AHCT74BQAlways Pb-free19.30.52E911
74AHCT74D74AHCT74D,11874AHCT74Dweek 32, 200419.30.52E911
74AHCT74PW74AHCT74PW,11874AHCT74PWweek 10, 200519.30.52E911

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
74AHC74D74AHC74D,11274AHC74Dweek 32, 200419.30.52E911
74AHC74PW74AHC74PW,11274AHC74PWweek 10, 200519.30.52E911
74AHCT74D74AHCT74D,11274AHCT74Dweek 32, 200419.30.52E911
74AHCT74PW74AHCT74PW,11274AHCT74PWweek 10, 200519.30.52E911
Quality and reliability disclaimer

Documentation (10)

File nameTitleTypeDate
74AHC_AHCT74Dual D-type flip-flop with set and reset; positive-edge triggerData sheet2020-04-22
ahc74ahc74 IBIS modelIBIS model2013-04-07
ahct74ahct74 IBIS modelIBIS model2013-04-07
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

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
ahc74ahc74 IBIS modelIBIS model2013-04-07
ahct74ahct74 IBIS modelIBIS model2013-04-07

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.