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74HCT109D

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.

Alternatives

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: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

    • CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V

  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Parametrics

Type number VCC (V) Logic switching levels Output drive capability (mA) tpd (ns) fmax (MHz) Power dissipation considerations Tamb (°C) Package name
74HCT109D 4.5 - 5.5 TTL ± 4 17 61 low -40~125 SO16

PCB Symbol, Footprint and 3D Model

Model Name Description

Package

Type number Orderable part number, (Ordering code (12NC)) Status Marking Package Package information Reflow-/Wave soldering Packing
74HCT109D 74HCT109D,653
(933714960653)		 Active 74HCT109D SOT109-1
SO16
(SOT109-1) 		SOT109-1 SO-SOJ-REFLOW
SO-SOJ-WAVE
WAVE_BG-BD-1
Not available

Environmental information

Type number Orderable part number Chemical content RoHS RHF-indicator
74HCT109D 74HCT109D,653 74HCT109D rohs rhf rhf
Quality and reliability disclaimer

Series

Documentation (11)

File name Title Type Date
74HC_HCT109 Dual JK flip-flop with set and reset; positive-edge-trigger Data sheet 2024-02-21
AN11044 Pin FMEA 74HC/74HCT family Application note 2019-01-09
SOT109-1 3D model for products with SOT109-1 package Design support 2020-01-22
Nexperia_package_poster Nexperia package poster Leaflet 2020-05-15
SO16_SOT109-1_mk plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm body Marcom graphics 2017-01-28
SOT109-1 plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body Package information 2023-11-07
74HCT109D_Nexperia_Product_Reliability 74HCT109D Nexperia Product Reliability Quality document 2024-06-16
SO-SOJ-REFLOW Footprint for reflow soldering Reflow soldering 2009-10-08
HCT_USER_GUIDE HC/T User Guide User manual 1997-10-31
SO-SOJ-WAVE Footprint for wave soldering Wave soldering 2009-10-08
WAVE_BG-BD-1 Wave soldering profile Wave soldering 2021-09-08

Support

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Models

File name Title Type Date
SOT109-1 3D model for products with SOT109-1 package Design support 2020-01-22

PCB Symbol, Footprint and 3D Model

Model Name Description

Ordering, pricing & availability

Type number Orderable part number Ordering code (12NC) Status Packing Packing Quantity Buy online
74HCT109D 74HCT109D,653 933714960653 Active Not available 2,500 Order product

Sample

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How does it work?

The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.

Interactive datasheet

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HCT109D 74HCT109D,653 933714960653 SOT109-1 Order product