JD54LS139SFA

Overview

The JD54LS139SFA is a dual 2-line to 4-line decoder/demultiplexer from the 54LS series, manufactured by National Semiconductor. It features two independent circuits in a 16-CFP package. The device operates within a temperature range of -55°C to 125°C. Output specifications include a high-level current of 400µA and a low-level current of 4mA.

Feature Summary

• Dual independent 2-to-4 decoding circuits
• Extended military-grade temperature operation
• Low-power Schottky logic family compatibility

Applications

• Address decoding for memory systems
• Demultiplexing data streams
• Control signal distribution in industrial environments

Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets are held by Texas Instruments. Confirm the specific suffix 'SFA' corresponds to the 16-CFP flat pack package. Ensure the component meets the required -55°C to 125°C operating temperature range for your application environment.

Selection Notes

Select this part when dual independent decoders are required with extended temperature tolerance. The LS series offers a balance of speed and power consumption. Verify pinout compatibility if replacing legacy components. Consider the CFP package constraints for PCB layout and thermal management.

Part Context

This component belongs to the 54LS series, designed for military and aerospace applications requiring wide temperature ranges. It is functionally similar to the standard 74LS139 but with enhanced environmental ratings. The device provides reliable decoding for digital logic systems.

Replacement Considerations

Check for direct equivalents such as DM54LS139 or SN54LS139. Verify package compatibility and electrical parameters before substitution.