74HC109; 74HCT109

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

The 74HC109; 74HCT109 is a dual positive edge triggered JK flip-flop featuring individual nJ and nK inputs. It has clock (nCP) inputs, set (nSD) and reset (nRD) inputs and complementary nQ and nQ outputs. The set and reset are asynchronous active LOW inputs and operate independently of the clock input. The nJ and nK inputs control the state changes of the flip-flops as described in the mode select function table. The nJ and nK inputs must be stable one set-up time prior to the LOW-to-HIGH clock transition for predictable operation. The JK design allows operation as a D-type flip-flop by connecting the nJ and nK inputs together. Inputs include clamp diodes. It enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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

Features and benefits

  • Input levels:
    • For 74HC109: CMOS level
    • For 74HCT109: TTL level
  • J and K inputs for easy D-type flip-flop
  • Toggle flip-flop or "do nothing" mode
  • 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
74HC109DProduction2.0 - 6.0CMOS± 5.21575low-40~125866.644SO16
74HCT109DProduction4.5 - 5.5TTL± 41761low-40~125866.644SO16
74HCT109DB
NRND
Not for design inSSOP16
74HCT109PWProduction4.5 - 5.5TTL± 41761low-40~1251193.248.1TSSOP16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC109D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC109D74HC109D,653
( 9337 144 80653 )
Bulk Pack, CECCActive74HC109D74HC109D,652
( 9337 144 80652 )
74HCT109D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT109D74HCT109D,653
( 9337 149 60653 )
Bulk Pack, CECCActive74HCT109D74HCT109D,652
( 9337 149 60652 )
74HCT109DB
NRND

SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Bulk PackActiveHCT10974HCT109DB,112
( 9351 863 20112 )
74HCT109PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT10974HCT109PW,118
( 9351 863 30118 )
Bulk PackActiveHCT10974HCT109PW,112
( 9351 863 30112 )

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))
74HCT109DB
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1Discontinued / End-of-lifeHCT10974HCT109DB,118
( 9351 863 20118 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HCT109DB9351863201182021-06-302021-12-3174HCT109PW

    Quality, reliability & chemical content

    Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
    74HC109D74HC109D,65374HC109Dweek 6, 200484.96.621.51E811
    74HC109D74HC109D,65274HC109Dweek 6, 200484.96.621.51E811
    74HCT109D74HCT109D,65374HCT109Dweek 6, 200484.96.621.51E811
    74HCT109D74HCT109D,65274HCT109Dweek 6, 200484.96.621.51E811
    74HCT109DB
    NRND
    74HCT109DB,11274HCT109DBweek 12, 200511
    74HCT109PW74HCT109PW,11874HCT109PWweek 10, 200584.96.621.51E811
    74HCT109PW74HCT109PW,11274HCT109PWweek 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
    74HCT109DB74HCT109DB,11874HCT109DBweek 12, 200511
    Quality and reliability disclaimer

    Documentation (11)

    File nameTitleTypeDate
    74HC_HCT109Dual JK flip-flop with set and reset; positive-edge triggerData sheet2020-04-01
    AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
    HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
    SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2021-01-06
    SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
    SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
    SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
    SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21
    SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
    SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
    SOT338-1plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm bodyPackage information2020-04-21

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