54F139DM-MLS

Overview

The 54F139DM-MLS is a dual 1-of-4 decoder/demultiplexer manufactured by National Semiconductor. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature range from -55°C to 125°C. The component utilizes F/FAST series logic technology and is housed in a 16-CDIP package with a pin pitch of 0.300 inches (7.62mm). It features through-hole mounting and contains one functional unit configured as a 1 x 2:4 decoder.

Feature Summary

• Dual 1-of-4 decoding and demultiplexing functionality
• Military-grade wide temperature operation capability
• Ceramic dual in-line packaging for durability

Applications

• Signal routing in harsh environments
• Address decoding systems
• Demultiplexing data streams

Procurement Notes

Verify the specific suffix MLS against official National Semiconductor documentation to confirm exact manufacturing lot or screening level requirements. Ensure compatibility with existing ceramic DIP footprints and validate that the 4.5V to 5.5V supply range meets system power constraints. Confirm RoHS status as non-compliant based on available records.

Selection Notes

Select this component when dual independent 1-of-4 decoding is required in high-reliability applications. The ceramic package and extended temperature range make it suitable for military or aerospace contexts where standard plastic packages may fail. Ensure input logic levels are compatible with F/FAST TTL standards.

Part Context

This part belongs to the National Semiconductor 54F series, designed for high-speed digital logic applications. The 54F139 specifically provides two independent decoders or demultiplexers in a single package, offering space efficiency compared to discrete solutions. It is part of the broader family of fast logic components used in complex digital systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.