54ACT161WRQMLV

Overview

The National Semiconductor 54ACT161WRQMLV is a high-speed CMOS synchronous binary counter designed for aerospace and harsh environments. It features an asynchronous clear input and operates within a 4.5 V to 5.5 V supply voltage range. The device is housed in a hermetic ceramic package, ensuring reliability under extreme conditions. It provides radiation hardness against total ionizing dose (TID) up to 300 krad(Si) and is immune to single event latch-up (SEL) up to 110 MeV.cm²/mg. The component supports a wide operating temperature range from -55 °C to +125 °C.

Feature Summary

• High radiation hardness suitable for demanding space applications
• Immunity to single event latch-up (SEL)
• Hermetic ceramic packaging for environmental protection

Applications

• Aerospace systems requiring radiation tolerance
• Harsh environment electronic circuits
• Spacecraft data processing units

Procurement Notes

Verify the specific QML-V qualification status and manufacturer documentation when sourcing this component. Ensure that the received parts match the required hermetic package specifications and radiation hardness ratings. Confirm compliance with standard microcircuit drawing (SMD) requirements available through official defense logistics channels before final procurement decisions.

Selection Notes

Select this part for designs requiring robust performance in high-radiation environments. It is appropriate where TTL-compatible logic levels are needed alongside high-speed CMOS operation. Consider the hermetic package constraints and thermal management requirements associated with ceramic housing in your system design process.

Part Context

This component belongs to the 54AC/54ACT series of high-speed CMOS functions. These devices are specifically engineered to meet stringent radiation requirements for the aerospace industry. The series includes various gates, flip-flops, counters, and bus interfaces, all characterized for high total ionizing dose tolerance and single event upset immunity.

Replacement Considerations

Direct replacements include other QML-V qualified 54ACT161 variants from manufacturers such as STMicroelectronics. Verify pin compatibility and radiation hardness specifications when substituting. Cross-reference with DLA standard microcircuit drawings to ensure functional equivalence in critical aerospace applications.