JD54F74SDA

Overview

The JD54F74SDA is a dual D-type flip-flop with preset and clear inputs, manufactured by National Semiconductor. It belongs to the 54F series of Schottky TTL logic devices, designed for military-grade reliability and performance. The component features high-speed operation typical of the F-series, with propagation delays in the nanosecond range. It operates within a standard supply voltage range for TTL logic, ensuring compatibility with other 54F series components. The device is housed in a ceramic flatpack package, suitable for high-reliability applications requiring robust environmental tolerance.

Feature Summary

• Dual D-type flip-flop architecture with independent preset and clear controls
• Schottky TTL technology for high-speed switching capabilities
• Military-grade construction ensuring extended temperature range operation
• Ceramic flatpack packaging for enhanced thermal and mechanical stability

Applications

• Military aerospace data processing systems
• High-reliability industrial control logic circuits
• Spacecraft telemetry and command storage registers
• Defense communication system timing synchronization

Procurement Notes

Verify the manufacturer date code and lot traceability to ensure compliance with military specifications. Confirm that the ceramic package integrity is intact without cracks or seal defects. Request test reports verifying electrical parameters against the original datasheet limits. Ensure proper handling procedures are followed due to the sensitivity of ceramic packages to mechanical stress during installation.

Selection Notes

Select this component when military-grade reliability and high-speed TTL performance are required. Consider the ceramic flatpack form factor for applications demanding superior thermal dissipation and hermetic sealing. Evaluate the need for dual flip-flops with preset and clear functions in state machine designs. Verify compatibility with existing 54F series logic families in the system architecture.

Part Context

The JD54F74SDA is part of National Semiconductor's extensive 54F series portfolio, which provides high-speed Schottky TTL logic solutions. This specific model represents a dual D-type flip-flop variant, offering two independent storage elements within a single package. The 54F series is known for its balanced speed-power product, making it suitable for complex digital systems requiring fast response times.

Replacement Considerations

Direct replacements include equivalent parts from other manufacturers producing 54F74 compatible devices. Verify pinout compatibility and electrical characteristics before substitution. Cross-reference with current military specification documents to ensure functional equivalence. Consider redesigning if newer technologies offer improved performance or availability.