JM54AC257SEA-RH

Overview

The JM54AC257SEA-RH is a high-speed AC-CMOS quad multiplexer/demultiplexer manufactured by National Semiconductor. It operates within a voltage range of 2V to 6V and supports data rates up to 100 MHz. The device features low power consumption, with dynamic power dissipation of 8 mW per gate at 10 MHz. It is housed in a hermetic ceramic flatpack package (JG or SE) and is qualified under MIL-PRF-38535 for Class K/KH levels. The component is designed for harsh environments, offering radiation hardness against total ionizing dose effects.

Feature Summary

• Hermetically sealed ceramic packaging suitable for extreme environmental conditions
• High radiation tolerance characterized for aerospace and military applications
• Low power CMOS technology ensuring efficient operation in battery-powered systems

Applications

• Aerospace signal routing and switching
• Military communication equipment data path selection
• Harsh environment industrial control systems requiring radiation hardening

Procurement Notes

Verify the specific suffix 'RH' indicates radiation-hardened processing as per manufacturer documentation. Confirm QML-V qualification status through official DLA or manufacturer channels. Ensure the ceramic package type matches system thermal and mechanical requirements. Validate that the operating voltage range aligns with the system's power supply specifications.

Selection Notes

Select this component when radiation hardness and hermetic sealing are mandatory. Compare propagation delay and power dissipation against standard commercial logic if environmental constraints allow. Consider the availability of compatible pinouts for existing PCB layouts. Evaluate the cost implications of military-grade qualification versus commercial alternatives.

Part Context

This part belongs to the 54AC series of high-speed CMOS logic functions. The series includes various gates, flip-flops, and bus interfaces designed for demanding applications. National Semiconductor, now part of Texas Instruments, produced these components to meet strict military standards. The AC series offers improved speed-over-power characteristics compared to older HC or HCT families.

Replacement Considerations

Check for direct equivalents from other manufacturers offering QML-V qualified AC-CMOS quad multiplexers. Verify pin compatibility and electrical parameters such as propagation delay and output drive current. Ensure the replacement maintains the same radiation hardness level and hermetic package style.