JM54ACT240SRA-R

Overview

The JM54ACT240SRA-R is a high-speed CMOS octal bus driver manufactured by National Semiconductor. It features two independent 4-bit buffers with inverted outputs and three-state control. The device operates within a voltage range of 4.5 V to 5.5 V and is housed in a hermetic ceramic flatpack package (CDFP20). Designed for demanding environments, it supports operation from -55 °C to +125 °C and meets QML-V qualification standards for radiation hardness, including tolerance to total ionizing dose up to 300 krad(Si) and immunity to single event latch-up.

Feature Summary

• High-speed CMOS technology providing fast switching capabilities
• Octal configuration with two independent 4-bit inverted buffers
• Three-state output control for effective bus line management
• Hermetically sealed ceramic construction suitable for harsh conditions

Applications

• Aerospace systems requiring radiation-hardened logic components
• Military applications subject to extreme temperature variations
• High-reliability data bus interface circuits
• Spacecraft communication subsystems

Procurement Notes

Verify the manufacturer origin carefully, as National Semiconductor assets are now held by Texas Instruments. Confirm that the specific lot corresponds to the original National Semiconductor production run if historical consistency is required. Ensure the part number suffix matches the exact package and qualification level needed for your design. Request full traceability documentation to validate the component's history and storage conditions prior to installation.

Selection Notes

Select this component when a radiation-tolerant octal buffer is required for space or military platforms. It serves as a direct functional replacement for standard 54ACT240 devices where environmental resilience is critical. Consider the hermetic package requirements and verify that the 5V logic levels align with the system architecture. Evaluate the thermal performance within the specified -55 °C to +125 °C range for the intended application environment.

Part Context

This part belongs to the 54ACT series of high-speed CMOS logic functions designed for aerospace use. The series includes various gates, flip-flops, and bus interfaces qualified under QML-V standards. These components are engineered to withstand significant radiation exposure, making them essential for satellite and defense electronics where standard commercial parts would fail due to single-event effects or total ionizing dose degradation.

Replacement Considerations

Check for availability of equivalent radiation-hardened parts from other qualified vendors such as Cobham or Microchip. Verify pin compatibility and electrical specifications against current datasheets. Ensure that any substitute maintains the same hermetic sealing and temperature rating requirements.