SN74LS109AD

Flip Flops Overview

The SN74LS109AD is a dual J-K positive-edge-triggered flip-flop from Texas Instruments' LS logic family. It integrates two independent flip-flops with preset and clear functions in a 16-pin SOIC-Narrow package. Key electrical parameters include a propagation delay of 40 ns, a maximum clock frequency of 33 MHz, and an operating supply voltage range of 4.75 V to 5.25 V. The device features TTL-compatible inputs and outputs, with a low-level output current capability of 8 mA and a high-level output current of -400 µA.

Flip Flops Feature Summary

• Dual configuration containing two independent J-K flip-flops within a single integrated circuit
• Positive-edge triggering mechanism synchronized by the clock input for precise timing control
• Integrated asynchronous preset and clear functions allowing immediate state initialization

Flip Flops Applications

• Digital counting circuits requiring binary or decimal sequence generation
• Data storage elements in shift register architectures
• Frequency division networks utilizing toggle mode operation

Flip Flops Procurement Notes

Verify component authenticity through authorized distribution channels due to the prevalence of counterfeit logic ICs. Confirm that the SOIC-Narrow package matches the required PCB footprint dimensions. Ensure the supply voltage remains strictly within the specified 4.75 V to 5.25 V range to prevent logical malfunction or permanent damage to the internal transistor structures.

Flip Flops Selection Notes

Select this component when standard Low-power Schottky speed is sufficient for the application timing requirements. Consider alternative packages such as PDIP if through-hole mounting is necessary for mechanical stability. Evaluate power consumption constraints against other logic families if energy efficiency is a primary design criterion.

Flip Flops Part Context

This device belongs to the widely adopted 74LS series, known for balancing speed and power dissipation in bipolar logic applications. It serves as a fundamental building block for sequential logic systems. The specific 'AD' suffix denotes the small outline package variant, distinguishing it from through-hole DIP options while maintaining identical internal functionality and pinout compatibility.

Flip Flops Replacement Considerations

• SN74LS109ADG4
• SN74LS109AN
• SN74LS109ANE4