74LS109 IC Dual JK Flip-Flop with Clear and Preset DIP-14 74LS109

Product Overview

The 74LS109A is a dual J-K' (where K is inverted) positive-edge-triggered flip-flop device. Unlike standard J-K flip-flops, the K input is inverted, which allows for versatile configurations—such as a D-type flip-flop (by tying J and K' together) or a toggle flip-flop (by grounding K' and tying J HIGH). It features asynchronous PRESET and CLEAR inputs that override all other signals.

Core Specifications

Manufacturer: Texas Instruments

 Package Type: Available in various packages, including Plastic Small-Outline (SOIC), Ceramic Chip Carriers, Flat Packages, and standard Plastic/Ceramic DIPs.

 Function: Dual (2-bit) positive-edge-triggered flip-flops with asynchronous PRESET and CLEAR.