DM74LS109AN

Overview

The DM74LS109AN is a dual J-K positive-edge-triggered flip-flop from the 74LS series. It features independent preset and clear inputs for direct control of output states. The device operates within a supply voltage range of 4.75V to 5.25V and supports a maximum clock frequency of 33 MHz. It utilizes standard TTL logic levels with defined low and high input thresholds. The component is housed in a 16-pin plastic DIP package suitable for through-hole mounting.

Feature Summary

• Dual J-K flip-flops with positive-edge triggering
• Independent asynchronous preset and clear functions
• Complementary outputs (Q and Q-bar) per element

Applications

• Digital counting circuits
• Frequency division networks
• Sequential logic state machines

Procurement Notes

Verify component authenticity due to discontinued status. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for electrical parameter updates. Ensure storage conditions prevent moisture damage prior to soldering. Validate supplier authorization for legacy semiconductor sourcing.

Selection Notes

Select this component for designs requiring synchronous J-K operation with dedicated reset controls. Consider compatibility with existing 74LS family logic levels. Evaluate thermal performance within specified operating temperature ranges. Assess board space requirements against the 16-DIP footprint constraints.

Part Context

This part belongs to the onsemi 74LS standard logic product line, designed for general-purpose digital applications. It complements other 74LS devices such as gates and buffers within system architectures. The series emphasizes reliability and cost-effectiveness for industrial and consumer electronics manufacturing.

Replacement Considerations

Direct substitutes include SN74LS109AN from Texas Instruments. Verify pinout compatibility and electrical specifications before integration. Alternative options may require logic level translation or timing adjustments.