JM54ACT574S2A-R

Overview

The JM54ACT574S2A-R is an octal D-type flip-flop manufactured by National Semiconductor, belonging to the 54ACT logic series. It features eight independent D-type flip-flops with three-state outputs, designed for high-speed digital applications. The device supports a clock frequency of up to 70 MHz and exhibits a propagation delay of 13.5 ns at 5V supply voltage with a 50 pF load capacitance. It operates within a standard TTL logic circuit environment, ensuring reliable timing performance. The component is housed in a 20-CLCC package.

Feature Summary

• Octal D-type flip-flop architecture with three-state outputs
• Supports clock frequencies up to 70 MHz for high-speed operation
• Low propagation delay of 13.5 ns under standard loading conditions
• Compatible with standard TTL logic circuits

Applications

• High-speed digital logic systems
• Data storage and register applications
• Bus driver interfaces requiring three-state control
• Timing-critical digital signal processing

Procurement Notes

Verify the manufacturer designation as National Semiconductor, noting that this entity has undergone corporate restructuring. Confirm the specific suffix 'R' indicates reel packaging if required by assembly processes. Ensure the 20-CLCC package type matches the target PCB footprint. Check for moisture sensitivity levels and handling requirements consistent with ceramic leadless chip carrier components. Validate that the part meets the specified 54ACT series electrical characteristics rather than commercial variants.

Selection Notes

Select this component when designing systems requiring octal data latching with high-speed performance capabilities. The 54ACT series offers faster switching speeds compared to standard HC or HCT families while maintaining CMOS power efficiency. Consider the 20-CLCC package constraints for surface-mount assembly. Ensure the application voltage remains at 5V to achieve the specified 13.5 ns propagation delay. Evaluate thermal management needs given the ceramic package construction and intended operating temperature range.

Part Context

This part belongs to the 54ACT family, which represents military-grade or extended temperature range specifications derived from the commercial ACT line. National Semiconductor was a prominent analog and mixed-signal manufacturer before its acquisition by Texas Instruments. The 54ACT574 variant specifically provides octal configuration, distinguishing it from hex or quad flip-flop alternatives within the same logic family.

Replacement Considerations

Direct substitutes include MC74ACT574DWR2G from onsemi, though package differences exist between CLCC and SOIC formats. MM74HC574J from National Semiconductor/TI offers similar functionality but utilizes HC series technology with different speed characteristics. Verify pin compatibility and electrical parameter alignment when cross-referencing with other octal D-type flip-flops.