JM54AC373S2A-RH

Latches Overview

The JM54AC373S2A-RH is an octal D-type transparent latch with three-state outputs manufactured by National Semiconductor. It belongs to the AC series of high-speed CMOS logic functions. The device features eight independent latches designed for bus-organized system applications. Data appears on the bus when the output enable signal is active, while the outputs enter a high-impedance state when disabled. This component is suitable for demanding environmental conditions due to its radiation hardness and immunity to single-event effects.

Latches Feature Summary

• Radiation-hardened design qualified for aerospace environments
• Immunity to single-event latch-up and upset
• Hermetic ceramic packaging for durability
• Three-state outputs for efficient bus interfacing

Latches Applications

• Aerospace avionics systems
• Military communication equipment
• Spacecraft data handling units
• High-reliability industrial control buses

Latches Procurement Notes

Verify that the specific suffix indicates the correct radiation qualification level required for your mission. Confirm hermetic sealing integrity if operating in vacuum or extreme pressure. Ensure compatibility with existing board layouts for the specified package type. Check for updated manufacturing sources as National Semiconductor assets have transitioned. Validate that the batch meets current SMD specifications.

Latches Selection Notes

Select this part when standard commercial logic fails under ionizing radiation exposure. Consider the hermetic package requirements versus cost constraints. Evaluate the need for single-event upset immunity in orbit or high-altitude operations. Compare power consumption against other radiation-hardened alternatives. Ensure the three-state functionality matches the bus architecture requirements.

Latches Part Context

This component is part of the broader 54AC family of radiation-hardened CMOS logic devices. It shares functional similarities with other octal latches but offers specific MIL-spec reliability. The AC series provides higher speed than older HC or HCT variants while maintaining low power consumption. It serves as a critical interface element in systems requiring long-term stability in harsh environments.

Latches Replacement Considerations

Direct substitutes include other radiation-hardened octal latches from manufacturers like Microchip or Teledyne. Verify pinout compatibility before swapping. Ensure equivalent radiation tolerance levels are met. Check for package dimension differences if space is constrained.