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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 J and K inputs, clock (CP) inputs, set (SD) and reset (RD) inputs and complementary Q and Q outputs. The set and reset are asynchronous active LOW inputs and operate independently of the clock input. The J and K inputs control the state changes of the flip-flops as described in the mode select function table. The J and K 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 J and K inputs together. This device features reduced input threshold levels to allow interfacing to TTL logic levels. Inputs also include clamp diodes, this 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

  • J and K inputs for easy D-type flip-flop
  • Toggle flip-flop or "do nothing" mode
  • Wide supply voltage range:
    • For 74HC109: from 2.0 V to 6.0 V
    • For 74HCT109: from 4.5 V to 5.5 V
  • CMOS low power dissipation
  • High noise immunity
  • Input levels:
    • For 74HC109: CMOS level
    • For 74HCT109: TTL level
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • 74HC109 complies with JEDEC standards:
    • JESD8C (2.7 V to 3.6 V)
    • JESD7A (2.0 V to 6.0 V)
  • 74HCT109 complies with JEDEC standard JESD7A (2.0 V to 6.0 V)
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • 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
74HC109PWProduction2.0 - 6.0CMOS± 5.21575low-40~1251193.248.1TSSOP16
74HCT109DProduction4.5 - 5.5TTL± 41761low-40~125866.644SO16
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 )
74HC109PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1Active74HC10974HC109PWJ
( 9356 912 05118 )
74HCT109D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT109D74HCT109D,653
( 9337 149 60653 )
74HCT109PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT10974HCT109PW,118
( 9351 863 30118 )

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))
74HC109D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack, CECCDiscontinued / End-of-life74HC109D74HC109D,652
( 9337 144 80652 )
74HCT109D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack, CECCDiscontinued / End-of-life74HCT109D74HCT109D,652
( 9337 149 60652 )
74HCT109PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeHCT10974HCT109PW,112
( 9351 863 30112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC109D933714480652
74HCT109D933714960652
74HCT109PW935186330112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC109D74HC109D,65374HC109Dweek 6, 200439.31.37.69E811
74HC109PW74HC109PWJ74HC109PW39.31.37.69E811
74HCT109D74HCT109D,65374HCT109Dweek 6, 200439.31.37.69E811
74HCT109PW74HCT109PW,11874HCT109PWweek 10, 200539.31.37.69E811

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
74HC109D74HC109D,65274HC109Dweek 6, 200439.31.37.69E811
74HCT109D74HCT109D,65274HCT109Dweek 6, 200439.31.37.69E811
74HCT109PW74HCT109PW,11274HCT109PWweek 10, 200539.31.37.69E811
Quality and reliability disclaimer

Documentation (9)

File nameTitleTypeDate
74HC_HCT109Dual JK flip-flop with set and reset; positive-edge-triggerData sheet2021-08-05
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
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
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
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

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