74HCT109DB NRND

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.

Not recommended for new designs (NRND), click here for the alternative product.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HCT109DB 74HCT109DB,118 935186320118 SOT338-1 Order product
74HCT109DB 74HCT109DB,112 935186320112 SOT338-1 Order product

Features

  • 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

Target applications

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)Package name
74HCT109DB
NRND
Not for design in4.5 - 5.5TTL+/- 41761low-40~12514842.0SSOP16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackageOutline versionReflow-/Wave solderingPacking
74HCT109DB
NRND
74HCT109DB,118
( 9351 863 20118 )
ActiveHCT109
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HCT109DB,112
( 9351 863 20112 )
ActiveHCT109Bulk Pack

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HCT109DB
NRND
74HCT109DB,11874HCT109DB11
74HCT109DB
NRND
74HCT109DB,11274HCT109DB11
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
74HC_HCT109Dual JK flip-flop with set and reset; positive-edge triggerData sheet2017-03-17
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow 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 bodyOutline drawing2018-10-18

Support

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Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74HCT109DB74HCT109DB,118935186320118Reel 13" Q1/T1Order product
74HCT109DB74HCT109DB,112935186320112Bulk PackOrder product

Sample

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