54ACT374DM-MLS

Overview

The 54ACT374DM-MLS is a military-grade, rad-hard octal D-type flip-flop with three-state outputs. It belongs to the 54AC/54ACT series designed for aerospace and harsh environments. The device features high radiation hardness, including 300 krad(Si) total ionizing dose tolerance and immunity to single event latch-up up to 110 MeV.cm²/mg. It operates within a voltage range of 4.5 V to 5.5 V and supports a temperature range of -55 °C to +125 °C. Housed in hermetic ceramic packages, it meets QML-V qualification standards.

Feature Summary

• High radiation hardness suitable for demanding space conditions
• Hermetic ceramic packaging for environmental sealing
• Immunity to single event latch-up and upset
• QML-V qualified for military specifications

Applications

• Aerospace systems requiring radiation tolerance
• Harsh environment electronic circuits
• Military grade bus interface applications
• Spacecraft data storage and transfer

Procurement Notes

Verify that the component is sourced from authorized distributors or manufacturers to ensure authenticity. Confirm that the part number includes the specific 'MLS' suffix indicating military lot traceability and hermetic packaging. Request documentation proving QML-V qualification and radiation test results. Ensure compliance with SMD specifications as defined by the Defense Logistics Agency. Validate supplier credentials against approved manufacturer lists.

Selection Notes

Select this component when radiation hardness is critical for system reliability. Consider the hermetic package requirements for extreme environmental exposure. Evaluate the need for QML-V qualification against project specifications. Compare performance against other rad-hard families if cost or availability is a constraint. Ensure voltage and temperature ranges match the operational environment.

Part Context

This part is part of the National Semiconductor (now Texas Instruments) 54AC/54ACT family. These components are high-speed CMOS functions designed for aerospace applications. The family includes various gates, flip-flops, and multiplexers. The 54ACT374 specifically provides octal D-type flip-flop functionality with three-state outputs for bus interfacing.

Replacement Considerations

Check for equivalent parts from other manufacturers offering similar rad-hard specifications. Verify pin compatibility and electrical characteristics before substitution. Ensure replacement parts meet the same QML-V and SMD requirements. Consult the DLA website for updated standard microcircuit drawings.