54LS298/BFA

Overview

The Rochester Electronics 54LS298/BFA is a military-grade quad 2-input multiplexer with storage, manufactured to MIL-PRF-38534 specifications. It features four independent data selectors, each capable of storing one bit of information. The device operates within a temperature range of -55°C to 125°C and utilizes a ceramic dual in-line package (CDIP) for high reliability. It supports standard TTL logic levels and includes tri-state outputs for bus-oriented applications.

Feature Summary

• Quad 2-input multiplexer architecture with integrated storage capability
• Military-grade construction meeting MIL-PRF-38534 standards
• Tri-state outputs for efficient bus system integration
• Hermetically sealed ceramic packaging for harsh environment resilience

Applications

• Military avionics signal routing
• Spacecraft data selection systems
• High-reliability industrial control interfaces
• Defense communication equipment multiplexing

Procurement Notes

Verify the specific suffix BFA corresponds to the required MIL-PRF-38534 class and hermetic seal type. Confirm lead times as these are specialized components. Ensure electrostatic discharge handling protocols are followed during receipt and installation. Validate that the manufacturer documentation matches the exact part marking and date code requirements for your program.

Selection Notes

Select this component when quad multiplexing with storage is required in extreme environments. It is suitable for designs needing tri-state isolation on shared buses. Consider the CDIP package constraints for board layout. Verify compatibility with existing TTL logic voltage levels and timing requirements before finalizing the design.

Part Context

This part belongs to the 54LS series of logic devices, known for low-power Schottky performance. Rochester Electronics manufactures these using original foundry wafers or recreated processes to meet legacy military specifications. The 54LS298 provides a robust solution for critical data path switching where standard commercial parts would fail due to environmental stress.

Replacement Considerations

Direct replacements include other manufacturers' 54LS298 variants meeting MIL-PRF-38534. Verify pinout compatibility and electrical characteristics against the original datasheet. Ensure the substitute also offers hermetic sealing if environmental protection is required. Cross-reference with SN54LS298 equivalents from other qualified sources.