JD54LS158B2A

Overview

The JD54LS158B2A is a military-grade quad 2-line to 1-line multiplexer belonging to the LS-TTL logic family. It features inverted outputs and is housed in a 16-pin ceramic dual flat pack (DFP) package. The device operates within an extended temperature range of -55 °C to 125 °C, ensuring reliability in harsh environments. It contains four independent multiplexers, each selecting one of two data inputs based on a common select line.

Feature Summary

• Military-grade construction utilizing hermetic ceramic packaging for enhanced environmental resistance
• Contains four independent 2-to-1 multiplexing channels with inverted output polarity
• Compatible with standard LS-TTL logic voltage levels and interface requirements

Applications

• Avionics signal routing systems
• Military communication equipment data selection
• Harsh environment industrial control logic

Procurement Notes

Verify the specific suffix B2A against manufacturer documentation to confirm pinout and package dimensions. Ensure the supplier provides traceability certificates appropriate for military specifications. Confirm that the ceramic DFP-16 package matches the design footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when military-grade radiation and thermal stability are required for multiplexing tasks. Compare performance characteristics against other LS-TTL variants if lower cost commercial grades suffice. Verify that the inverted output logic aligns with downstream circuit requirements without additional inversion stages.

Part Context

This part belongs to the National Semiconductor 54LS series, designed for high-reliability applications. The 'JD' prefix typically denotes military qualification standards. As a legacy TTL component, it serves as a replacement for older avionics and defense systems requiring robust digital switching capabilities.

Replacement Considerations

Check for direct equivalents from NXP or Texas Instruments in the 54LS158 family. Verify compatibility with existing board layouts due to potential minor pinout variations between manufacturers.