SNJ54LS73AJ

Flip Flops Overview

The SNJ54LS73AJ is a dual J-K flip-flop from the Texas Instruments SN54LS73A series, designed for military and aerospace applications. It features two independent negative edge-triggered J-K flip-flops with complementary outputs and active-low clear inputs. The device utilizes LS TTL logic technology, ensuring low power consumption while maintaining high-speed performance. It operates within an extended temperature range of -55°C to 125°C and is housed in a 14-pin ceramic dual flatpack (CDFP) or ceramic dual in-line package (CDIP). Key electrical characteristics include a maximum propagation delay of 150 ns and a maximum supply current of 1.44 mA.

Flip Flops Feature Summary

• Dual independent J-K flip-flops with negative edge triggering
• Active-low asynchronous clear inputs for each flip-flop
• Complementary Q and Q-bar outputs for versatile logic interfacing
• Military-grade reliability with extended temperature operation

Flip Flops Applications

• Military avionics data processing systems
• Aerospace telemetry control circuits
• High-reliability digital state storage
• Ruggedized counter and register designs

Flip Flops Procurement Notes

Verify the specific package variant (CDFP vs CDIP) and marking code (e.g., .A suffix) against the required drawing specifications. Ensure the component meets the necessary MIL-PRF-38534 or equivalent quality level requirements. Confirm that the supplier provides traceability documentation suitable for defense or space programs. Check for any restrictions on new old stock availability if production quantities are needed.

Flip Flops Selection Notes

Select this component when dual J-K functionality with complementary outputs is required in harsh environments. The LS family offers a balance of speed and power dissipation suitable for battery-constrained or heat-sensitive military platforms. Consider the 14-pin ceramic package for superior thermal and mechanical stability compared to plastic alternatives. Verify voltage levels match the system's 5V logic standards.

Flip Flops Part Context

This part belongs to the SN54LS73A family of dual J-K flip-flops. The 'SNJ' prefix indicates a military-grade version manufactured by Texas Instruments. It is functionally compatible with other SN54LS73 variants but distinguished by its rigorous testing and packaging for extreme environmental conditions. The device serves as a fundamental building block for sequential logic in critical systems.

Flip Flops Replacement Considerations

Direct substitutes include SN54LS73AJ and SN54LS73A. Cross-reference with SNJ54L73T-17 for similar military dual J-K functionality, though verify package and exact timing specs. Ensure any replacement maintains the same pinout and electrical characteristics for drop-in compatibility.