4539BDM

Overview

The CD4539BDM is a quad 2-input multiplexer manufactured by National Semiconductor. It features four independent 2-to-1 data selectors in a single package, enabling efficient routing of digital signals. The device utilizes CMOS technology and is housed in a 14-pin ceramic dual in-line package (CDIP). Designed for high reliability, it meets MIL-STD-883 Class C screening requirements, ensuring suitability for demanding military and aerospace applications where robust performance under extreme conditions is critical.

Feature Summary

• Integrates four independent 2-to-1 data selectors within a single integrated circuit
• Utilizes CMOS technology for low power consumption and high noise immunity
• Housed in a hermetic ceramic dual in-line package for environmental protection
• Qualified to MIL-STD-883 Class C standards for military-grade reliability

Applications

• Military avionics signal routing systems
• Aerospace telemetry data selection
• High-reliability industrial control logic
• Defense communication equipment multiplexing

Procurement Notes

Verify the specific suffix 'BDM' corresponds to the ceramic DIP package and MIL-STD-883 Class C screening level. Confirm that the manufacturer designation aligns with National Semiconductor or its successor entities. Ensure documentation explicitly states compliance with military qualification standards rather than commercial equivalents. Request full traceability records if required for defense contracts.

Selection Notes

Select this component when multiple independent 2-to-1 switching functions are required in a space-constrained, high-reliability environment. The ceramic package offers superior thermal stability and hermeticity compared to plastic variants. Consider this part for designs requiring strict adherence to military quality standards and long-term operational stability in harsh environments.

Part Context

This component belongs to the CD4000/CD4500 series of CMOS logic devices produced by National Semiconductor. These parts are widely recognized for their compatibility with standard TTL logic levels while offering lower power dissipation. The CD4539 specifically addresses the need for compact multiplexing solutions in legacy and modern military electronic systems requiring proven CMOS architecture.

Replacement Considerations

Direct substitutes include other CD4539 variants from qualified manufacturers that meet MIL-STD-883 Class C specifications. Verify pinout compatibility and electrical characteristics before substitution. Ensure any replacement maintains the same ceramic package style and screening level to preserve system reliability standards.