JM54AC257BFA-RH

Overview

The JM54AC257BFA-RH is a high-reliability quad multiplexer belonging to the AC series, manufactured by National Semiconductor. It features four independent 2-line to 1-line data selectors with true outputs and is housed in a ceramic LCC-20 package. The device is qualified under Mil-Prf-38535 for ionizing radiation hardness up to 100 krads(Si). It operates within a temperature range of -55 °C to 125 °C and supports a load capacitance of 50 pF.

Feature Summary

• Radiation-hardened design suitable for harsh environments
• High-speed CMOS logic family performance
• Ceramic hermetic packaging for reliability

Applications

• Military aerospace systems
• Spacecraft data routing
• Radiation-tolerant computing interfaces

Procurement Notes

Verify that the specific lot corresponds to the required MIL-PRF-38535 qualification level. Confirm the radiation hardness rating matches system requirements, as plastic packaged variants may exhibit different degradation characteristics under ionizing dose conditions. Ensure the ceramic package type aligns with thermal and mechanical constraints.

Selection Notes

Select this component when radiation tolerance is critical. Compare against standard commercial AC series parts if environmental exposure is minimal. Verify pinout compatibility with existing LCC-20 footprints. Consider thermal management needs given the wide operating temperature range.

Part Context

This part belongs to the National Semiconductor AC series of high-speed CMOS logic devices. The 'JM' prefix typically denotes military grade specifications. The 'BFA' suffix indicates the specific ceramic leadless chip carrier package configuration. It serves as a radiation-hardened alternative to commercial multiplexers for defense applications.

Replacement Considerations

Direct substitutes include other MIL-PRF-38535 qualified quad multiplexers from the same manufacturer or equivalent radiation-hardened parts from vendors like Raytheon or Honeywell. Verify functional equivalence and radiation specs before substitution.