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 V_CC.

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: 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	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
74HC109PW	Production	2.0 - 6.0	CMOS	± 5.2	15	75	low	-40~125	119	3.2	48.1	TSSOP16
74HCT109D	Production	4.5 - 5.5	TTL	± 4	17	61	low	-40~125	86	6.6	44	SO16
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	SOT109-1_653	Active	74HC109D	74HC109D,653 ( 9337 144 80653 )
74HC109PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	74HC109	74HC109PWJ ( 9356 912 05118 )
74HCT109D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_653	Active	74HCT109D	74HCT109D,653 ( 9337 149 60653 )
74HCT109PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	HCT109	74HCT109PW,118 ( 9351 863 30118 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product
74HC109D	933714480652	2021-12-31	2022-06-30	74HC109D
74HCT109D	933714960652	2021-12-31	2022-06-30	74HCT109D
74HCT109PW	935186330112	2021-12-31	2022-06-30	74HCT109PW

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC109D	74HC109D,653	74HC109D	week 6, 2004
74HC109PW	74HC109PWJ	74HC109PW
74HCT109D	74HCT109D,653	74HCT109D	week 6, 2004
74HCT109PW	74HCT109PW,118	74HCT109PW	week 10, 2005

Quality and reliability disclaimer

Documentation (9)

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
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
SO-SOJ-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SO-SOJ-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08
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
SOT403-1	plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm body	Package information	2023-11-08
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08

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