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Texas Instruments 74F109DC — Logic ICs

74F109DC J-K Flip-Flop, Bulk Package, Active

MPN74F109DC
End of Life

74F109DC, J-K flip-flop, 74F series, Bulk package, current lifecycle stage, RoHS non-compliant.

$0.47Ref. price · indicative, final on quote
Texas Instruments 74F109DC datasheet (PDF)
RoHSRoHS non-compliant
Series*
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

74F109DC specifications
ParameterValue
Series*
PackageBulk

Product details

The 74F109DC is a J-K flip-flop from the 74F family, a high-speed bipolar logic series. It is used in counters, shift registers, and state-machine designs where clocked toggling on the J and K inputs is required. The bulk package means the part ships loose in tubes or trays — typical for hand-assembly, prototyping, or low-volume production runs where tape-and-reel feed is not needed.

Pinout and function — what the buyer needs to know

Dual J-K positive-edge-triggered flip-flop with complementary Q and Q-bar outputs. Pinout: J, K, clock (CP), direct clear (CLR), and direct set (SD) per flip-flop.

Sourcing note

Active status means no last-time-buy scramble. RoHS non-compliance requires tin-lead solder acceptance at assembly.

Frequently asked questions

What is the pinout of 74F109DC?

The 74F109 is a dual J-K flip-flop with positive-edge triggering. The standard 16-pin DIP pinout includes J, K, clock (CP), direct clear (CLR), and direct set (SD) per flip-flop, plus VCC and GND. The 'DC' suffix indicates a ceramic DIP package.

What is the difference between 74F109 and 74F109DC?

The 'DC' suffix identifies the package and finish: a ceramic DIP supplied in bulk. The base 74F109 logic function (dual J-K flip-flop) is identical across all suffix variants; the difference is only the package type and lead finish.

What are equivalent ICs for 74F109DC?

The 74F109DC is a 74F-series dual J-K flip-flop. Functional equivalents include the 74S175PC (quad D flip-flop, different logic) and 74ACT11112N (J-K flip-flop in a different logic family). For a direct pin-compatible replacement, stay within the 74F109 family — the 74F109N (plastic DIP) or 74F109D (SOIC) share the same logic but differ in package and RoHS compliance.