54H74J/C

Overview

The Rochester Electronics 54H74J/C is a dual D-type flip-flop belonging to the SN54H74 family. It features two independent positive-edge-triggered circuits with separate data inputs, clock inputs, and complementary outputs. The device operates within a military temperature range of -55°C to +125°C and supports a supply voltage range of 5V ±10%. Packaged in a ceramic dual-in-line format (CDIP), it is designed for high-reliability applications requiring robust performance under extreme environmental conditions.

Feature Summary

• Dual independent D-type flip-flops with positive-edge triggering
• Military-grade operation from -55°C to +125°C
• 5V ±10% supply voltage tolerance
• Complementary outputs for each flip-flop

Applications

• Military aerospace systems
• Spacecraft data storage registers
• High-reliability industrial control logic

Procurement Notes

Verify the CDIP package configuration and lead-free status against specific project requirements. Confirm that the -55°C to +125°C operating range aligns with thermal management designs. Ensure compatibility with existing 5V logic interfaces before integration into final assemblies.

Selection Notes

Select this component when dual D-type flip-flops are required for space-constrained or high-vibration environments. The ceramic package offers superior hermeticity compared to plastic alternatives. Verify pinout compatibility with legacy SN54H74 schematics to ensure seamless replacement in existing military hardware designs.

Part Context

This part is manufactured by Rochester Electronics, LLC, specializing in discontinued and hard-to-find semiconductors. The 54-series designation indicates military-grade qualification, distinguishing it from commercial 74-series counterparts. The J suffix typically denotes a ceramic DIP package, ensuring durability in harsh operational settings.

Replacement Considerations

Direct replacements include other SN54H74 variants from qualified manufacturers. Verify pin compatibility and electrical specifications before substituting. Plastic packages may not meet the same environmental standards as the ceramic version.