DM54LS253W/883

Overview

The DM54LS253W/883 is a dual 4-input multiplexer manufactured by National Semiconductor. It operates on a 5 V supply and utilizes LS-TTL technology within a 16-pin ceramic flatpack (DFP) package. The device supports asynchronous data selection with tri-state outputs, providing high-impedance states for bus isolation. It is designed for military-grade reliability, featuring an operating temperature range from -55 °C to 125 °C. The component includes two independent 4-to-1 data selectors, each with dedicated enable inputs.

Feature Summary

• Dual independent 4-to-1 data selector circuits
• Tri-state output capability for bus isolation
• Military-grade ceramic flatpack construction
• LS-TTL logic family compatibility

Applications

• Military data routing systems
• High-reliability signal switching
• Bus interface isolation in aerospace electronics

Procurement Notes

Verify the specific suffix /883 indicates MIL-STD-883 screening requirements. Confirm RoHS non-compliance status due to lead content. Ensure the ceramic flatpack package matches the design footprint. Check for obsolescence status as National Semiconductor products may be discontinued or superseded by newer equivalents.

Selection Notes

Select this component when dual 4-to-1 multiplexing with tri-state outputs is required in harsh environments. The LS-TTL technology ensures compatibility with standard logic families while offering lower power consumption than standard TTL. The ceramic package provides superior thermal and mechanical stability compared to plastic alternatives for critical applications.

Part Context

This part belongs to the DM54 series of military-grade logic devices. The 'LS' designation indicates Low-power Schottky TTL technology. The '/883' suffix typically denotes compliance with MIL-STD-883 testing standards. National Semiconductor, now part of Texas Instruments, produced this line for defense and aerospace sectors requiring high reliability.

Replacement Considerations

Check for direct pin-compatible substitutes such as the DM54LS253J or other LS-series multiplexers. Verify that any replacement maintains the same tri-state functionality and military temperature rating. Ensure the new component supports the same 5 V supply voltage and package dimensions.