74HC109DB,112

Overview

The 74HC109DB,112 is a dual positive-edge-triggered J-K flip-flop manufactured by Nexperia USA Inc. in the SSOP-16 package. It features individual J and K inputs, clock (CP) inputs, asynchronous active-low set (SD) and reset (RD) inputs, and complementary Q and Q outputs. The device supports a wide supply voltage range of 2.0 V to 6.0 V and operates within a temperature range of -40 °C to +125 °C. It includes Schmitt-trigger action on the clock input for tolerance to slow rise/fall times and provides ESD protection exceeding 2000 V (HBM).

Feature Summary

• Dual positive-edge-triggered J-K flip-flops with independent control inputs.
• Asynchronous active-low set and reset functions operating independently of the clock.
• Schmitt-trigger action on clock input ensures tolerance to slower signal transitions.
• High noise immunity and robust ESD protection capabilities.

Applications

• D-type flip-flop configuration via J/K input connection.
• Toggle flip-flop or 'do nothing' mode operations.
• Digital state storage and sequential logic circuits.

Procurement Notes

Verify component authenticity through official Nexperia channels due to potential counterfeit risks. Confirm RoHS compliance and specific lot codes against current datasheets. Check for any recent Product Change Notifications (PCN) regarding marking or packaging updates. Ensure design-in compatibility with existing PCB footprints and thermal requirements before finalizing procurement plans.

Selection Notes

Select this component when dual edge-triggered memory elements are required in CMOS logic designs. It is suitable for applications needing TTL-compatible input levels if using HCT variants, though HC offers wider voltage ranges. Consider the SSOP-16 package constraints and ensure adequate board space for surface-mount assembly while meeting the specified operating temperature and voltage parameters.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It complements other Nexperia logic gates and flip-flops, providing essential sequential logic functionality. The 74HC109 specifically addresses needs for dual J-K configurations, offering flexibility in digital circuit design compared to single-function gates.

Replacement Considerations

• 74HC109D,653