DM54LS257AW/883

Overview

The DM54LS257AW/883 is a military-grade, hermetically sealed quad 2-line to 1-line data selector/multiplexer manufactured by National Semiconductor. It belongs to the LS TTL series and features tri-state outputs for bus-oriented memory driving. The device utilizes a CDFP16 ceramic flatpack package suitable for harsh environments.

Feature Summary

• Hermetically sealed ceramic flatpack construction
• Quad 2-input multiplexing capability
• Tri-state output control

Applications

• Military aerospace systems
• Harsh environment data routing
• Bus-oriented memory applications

Procurement Notes

Verify the specific suffix AW/883 against official National Semiconductor or Texas Instruments documentation to confirm MIL-STD-883 compliance and ceramic package authenticity. Ensure the component matches the exact LS TTL logic family specifications required for your circuit design before procurement.

Selection Notes

Select this component when radiation hardness and hermetic sealing are mandatory requirements. It serves as a direct replacement for standard plastic-packaged 54LS257 devices in applications requiring extended temperature ranges and physical durability under extreme conditions.

Part Context

This part is part of the 54LS series, designed for high-reliability applications. It functions as a quadruple 2-input multiplexer with tri-state outputs, allowing multiple sources to drive a single line while preventing bus contention through high-impedance states.