SNJ54LS109AJ

Flip Flops Overview

The SNJ54LS109AJ is a military-grade dual J-K positive-edge-triggered flip-flop manufactured by Texas Instruments. It features independent preset and clear inputs for each flip-flop, with the K input inverted. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 25MHz. It utilizes a 16-lead ceramic flatpack (CFP) package designed for high reliability in harsh environments, functioning across an extended temperature range from -55°C to 125°C.

Flip Flops Feature Summary

• Dual J-K positive-edge-triggered flip-flops with independent control
• Inverted K input configuration for specific logic requirements
• Military-grade construction using ceramic flatpack packaging
• Extended operational temperature range suitable for extreme conditions

Flip Flops Applications

• Military aerospace digital systems requiring high reliability
• Harsh environment data processing circuits
• High-speed synchronous logic design applications
• Spacecraft telemetry and command subsystems

Flip Flops Procurement Notes

Verify that the component matches the exact SNJ54LS109AJ designation, as the 'SNJ' prefix indicates military grade and 'AJ' specifies the ceramic flatpack variant. Confirm compliance with MIL-STD specifications and check for lot traceability documentation. Ensure the supplier provides authenticity guarantees, as this part is often subject to strict export controls and quality audits due to its defense application status.

Flip Flops Selection Notes

Select this component when military-grade reliability and radiation tolerance are required alongside standard LS logic functionality. The ceramic flatpack offers superior thermal stability compared to plastic packages. Consider the inverted K input behavior during schematic design. Verify that the system power supply remains strictly within the 4.5V to 5.5V range to ensure proper operation and prevent latch-up or performance degradation under extreme thermal loads.

Flip Flops Part Context

This part belongs to the SN54LS109 family, which defines dual J-K flip-flops with preset and clear capabilities. The SNJ series specifically denotes devices qualified for military standards, offering enhanced screening and testing procedures compared to commercial variants. The AJ suffix identifies the specific 16-lead ceramic flatpack physical form factor, distinguishing it from other package options like CDIP or CFP variations within the same logical family.

Flip Flops Replacement Considerations

Direct substitutes include SNJ54LS109AW and SNJ54LS109AFK, provided they match the required package type and military qualification level. Cross-referencing with SN54ALS109 variants may be possible but requires careful evaluation of speed and power differences. Always verify pinout compatibility and electrical characteristics before substitution.