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 V_CC.

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 number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	t_pd (ns)	f_max (MHz)	Power dissipation considerations	T_amb (°C)	R_th(j-a) (K/W)	Ψ_th(j-top) (K/W)	R_th(j-c) (K/W)	Package name
74HC109D	Production	2.0 - 6.0	CMOS	± 5.2	15	75	low	-40~125	86	6.6	44	SO16
74HCT109D	Production	4.5 - 5.5	TTL	± 4	17	61	low	-40~125	86	6.6	44	SO16
74HCT109DB NRND	Not for design in											SSOP16
74HCT109PW	Production	4.5 - 5.5	TTL	± 4	17	61	low	-40~125	119	3.2	48.1	TSSOP16

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC109D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 CECC	Active	74HC109D	74HC109D,653 ( 9337 144 80653 )
74HC109D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	Bulk Pack, CECC	Active	74HC109D	74HC109D,652 ( 9337 144 80652 )
74HCT109D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 CECC	Active	74HCT109D	74HCT109D,653 ( 9337 149 60653 )
74HCT109D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	Bulk Pack, CECC	Active	74HCT109D	74HCT109D,652 ( 9337 149 60652 )
74HCT109DB NRND	SSOP16 (SOT338-1)	SOT338-1	SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE	Bulk Pack	Active	HCT109	74HCT109DB,112 ( 9351 863 20112 )
74HCT109PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	HCT109	74HCT109PW,118 ( 9351 863 30118 )
74HCT109PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	Bulk Pack	Active	HCT109	74HCT109PW,112 ( 9351 863 30112 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HCT109DB	SSOP16 (SOT338-1)	SOT338-1	SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Discontinued / End-of-life	HCT109	74HCT109DB,118 ( 9351 863 20118 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product	Status	Comments
74HCT109DB	935186320118	2021-06-30	2021-12-31	74HCT109PW

Quality, reliability & chemical content

Type number	Orderable part number	Chemical content	Leadfree conversion date	EFR	IFR	MTBF (hour)	MSL	MSL leadfree
74HC109D	74HC109D,653	74HC109D	week 6, 2004	84.9	6.62	1.51E8	1	1
74HC109D	74HC109D,652	74HC109D	week 6, 2004	84.9	6.62	1.51E8	1	1
74HCT109D	74HCT109D,653	74HCT109D	week 6, 2004	84.9	6.62	1.51E8	1	1
74HCT109D	74HCT109D,652	74HCT109D	week 6, 2004	84.9	6.62	1.51E8	1	1
74HCT109DB NRND	74HCT109DB,112	74HCT109DB	week 12, 2005				1	1
74HCT109PW	74HCT109PW,118	74HCT109PW	week 10, 2005	84.9	6.62	1.51E8	1	1
74HCT109PW	74HCT109PW,112	74HCT109PW	week 10, 2005	84.9	6.62	1.51E8	1	1

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Orderable part number	Chemical content	RoHS / RHF	Leadfree conversion date	EFR	IFR	MTBF (hour)	MSL	MSL leadfree
74HCT109DB	74HCT109DB,118	74HCT109DB		week 12, 2005				1	1

Quality and reliability disclaimer

Documentation (11)

File name	Title	Type	Date
74HC_HCT109	Dual JK flip-flop with set and reset; positive-edge trigger	Data sheet	2020-04-01
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
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	2021-01-06
SO-SOJ-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SO-SOJ-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SOT403-1	plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm body	Package information	2020-04-21
SSOP-TSSOP-VSO-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SOT338-1	plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm body	Package information	2020-04-21

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