CD54HC74F3A

Overview

The CD54HC74F3A is a high-speed CMOS logic device featuring two independent D-type flip-flops. It utilizes a 14-pin ceramic dual in-line package (CDIP-14) with glass-sealed construction, designed for military and aerospace environments. The component operates within an extended temperature range of -55°C to +125°C and supports a nominal supply voltage of 5V. It functions as a positive edge-triggered circuit with complementary outputs, ensuring reliable data storage in synchronous digital systems.

Feature Summary

• Features two independent positive edge-triggered D-type flip-flops with complementary outputs
• Constructed with a hermetically sealed ceramic dual in-line package for environmental protection
• Operates reliably across an extended industrial and military temperature range

Applications

• Military-grade digital data storage circuits
• Aerospace synchronous logic systems
• High-reliability state machine implementations

Procurement Notes

Verify the specific manufacturer source, as this part number has been associated with Harris Semiconductor in public records. Confirm that the received unit matches the Texas Instruments specification sheet if TI sourcing is required. Ensure the ceramic package integrity is intact upon receipt. Validate that the component meets the necessary military qualification standards for the intended application environment before integration into final assemblies.

Selection Notes

Select this component when a hermetically sealed, radiation-hardened or high-temperature tolerant flip-flop is required. The HC series offers standard CMOS compatibility while maintaining high switching speeds. Consider the physical dimensions of the 14-pin CDIP package during PCB layout. Verify that the system power supply remains stable at 5V to ensure correct logic threshold operation under all specified temperature conditions.

Part Context

This device belongs to the HC/UH logic family, which provides high-speed CMOS performance. The '54' prefix typically denotes military-grade quality and extended temperature capabilities compared to commercial '74' variants. The F3A suffix indicates a specific packaging and processing configuration within the ceramic DIP lineup, distinguishing it from plastic or surface-mount alternatives in the same functional family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility if considering generic 74HC74 equivalents, noting that commercial versions lack the hermetic sealing and extended temperature rating of the CD54 series.