54F157/BFA

Overview

The 54F157/BFA is a quadruple 2-input multiplexer manufactured by Rochester Electronics, LLC. It functions as a data selector with four independent channels, each capable of selecting one of two data inputs based on common select lines. The device is dual marked as M38510/33906BFA, indicating its origin from a specific military or high-reliability production line. It belongs to the standard 54F logic family, designed for robust performance in demanding environments.

Feature Summary

• Provides four independent 2-to-1 data selection channels
• Utilizes common select inputs to control all channels simultaneously
• Dual marked for traceability and compliance with M38510 specifications

Applications

• Data routing in military communication systems
• Signal selection in aerospace instrumentation
• High-reliability digital logic circuits requiring MIL-STD compliance

Procurement Notes

Verify the dual marking M38510/33906BFA on the component surface to confirm authenticity. Ensure the procurement source provides valid chain-of-custody documentation. Check for RoHS non-compliance status if environmental regulations apply to your assembly process. Confirm package integrity upon receipt to prevent handling damage to the ceramic flatpack.

Selection Notes

Select this component when four independent data paths require simultaneous switching via common control signals. It is suitable for applications where standard commercial logic is insufficient due to environmental stress requirements. Consider the 54F series speed characteristics against system timing constraints. Verify that the flatpack package fits the available PCB footprint and assembly capabilities.

Part Context

Rochester Electronics specializes in sourcing and distributing obsolete and hard-to-find components, including those from legacy defense contractors. The 54F157/BFA represents a continuation of supply for critical military-grade logic devices no longer produced by original manufacturers. This part ensures availability for maintenance and sustainment programs requiring verified heritage components.

Replacement Considerations

Direct substitutes include other 54F157 variants from different manufacturers that meet M38510/33906 specifications. Verify pin compatibility and electrical parameters before substitution. Cross-reference with 54F157 datasheets from original vendors like Texas Instruments for functional equivalence.