54F251A/BEA

Overview

The 54F251A/BEA is a high-speed silicon gate logic device manufactured by Rochester Electronics, LLC. It functions as an 8-line to 1-line data selector or multiplexer within the Fairchild Semiconductor F/FAST series. The component features complementary outputs and operates using TTL logic levels. It is housed in a hermetically sealed ceramic dual in-line package (CDIP) with 16 pins, designed for robust performance in demanding environments.

Feature Summary

• Provides 8-to-1 multiplexing functionality with complementary output signals
• Utilizes high-speed silicon gate technology for rapid signal processing
• Features a hermetically sealed ceramic construction for environmental durability

Applications

• High-speed digital data routing and selection systems
• Military and aerospace electronic assemblies requiring radiation-hardened reliability
• Industrial control logic circuits utilizing TTL-compatible interfaces

Procurement Notes

Verify the specific suffix BEA confirms the ceramic dual in-line package and hermetic sealing characteristics required for your application. Confirm that the manufacturer designation aligns with Rochester Electronics' distribution of legacy semiconductor components. Ensure compatibility with existing board layouts designed for standard CDIP footprints.

Selection Notes

Select this component when high-speed switching speeds are critical alongside the need for hermetic sealing. It serves as a direct functional replacement for original Fairchild 54F251A devices. Consider its TTL compatibility and complementary outputs when designing interface logic stages.

Part Context

This part belongs to the 54F251 family of high-speed logic multiplexers. The 54-series designation typically indicates military-grade temperature ranges and stricter manufacturing tolerances compared to commercial variants. Rochester Electronics supports these legacy parts through reverse engineering and preservation of original fabrication processes.

Replacement Considerations

Direct pin-for-pin replacements include other 54F251 variants from different manufacturers. Verify that substitute components maintain the same CDIP package dimensions and hermetic sealing standards to ensure physical fit and environmental protection.