54H71FM

Overview

The 54H71FM is a military-grade, single D-type flip-flop manufactured by National Semiconductor. It features a positive-edge-triggered master-slave architecture with both complementary and non-inverting outputs. The device utilizes high-speed silicon-gate HMOS technology to ensure rapid switching speeds while maintaining low power consumption. Designed for harsh environments, it operates within an extended temperature range of -55°C to +125°C. The component is housed in a hermetically sealed ceramic flatpack package, providing superior protection against moisture and contaminants compared to standard plastic variants.

Feature Summary

• Positive-edge-triggered master-slave D flip-flop configuration
• Hermetically sealed ceramic flatpack construction for environmental resilience
• High-speed silicon-gate HMOS technology implementation
• Dual output availability including complementary and non-inverting signals

Applications

• Military aerospace data processing systems
• High-reliability industrial control logic circuits
• Harsh environment signal storage and synchronization
• Avionics timing and state management modules

Procurement Notes

Verify the authenticity of the National Semiconductor or Texas Instruments markings on the ceramic package lid. Confirm that the part retains its original hermetic seal integrity, as damage compromises military reliability standards. Check for specific military lot traceability documentation required for defense contracts. Ensure the supplier provides evidence of compliance with MIL-PRF-38534 specifications. Validate that the pinout matches the standard flatpack configuration before integration into sensitive circuitry.

Selection Notes

Select this component when designing systems requiring guaranteed operation under extreme thermal conditions and physical stress. The ceramic package offers necessary isolation for applications where standard plastic packages fail due to humidity or mechanical shock. Consider the specific speed-power trade-offs inherent to HMOS technology versus newer CMOS alternatives. Ensure the design accommodates the specific voltage levels and current drive capabilities defined in the official datasheet for reliable interface with other logic families.

Part Context

This component belongs to the SN54 series of logic integrated circuits, originally developed by National Semiconductor and now managed by Texas Instruments following their acquisition. The '54' prefix denotes the military temperature range specification, distinguishing it from commercial grade parts. The 'H' indicates High-Speed MOS technology, while '71' identifies the specific D flip-flop function code within the logic family hierarchy.

Replacement Considerations

Direct replacements include the SN54H71J variant, which shares identical electrical characteristics but may differ in package style. Cross-reference with SN54LS71 for lower power requirements if speed constraints allow. Verify that any substitute maintains the same military qualification status and hermetic sealing properties to ensure system reliability in critical applications.