MM54HC245E/883

Buffers, Drivers, Receivers, Transceivers Overview

The MM54HC245E/883 is a dual four-bit bus driver utilizing HC-CMOS technology. It features a 20-pin ceramic leadless chip carrier (LLCC) package with inverted output polarity and three-state outputs. The device operates within a supply voltage range of 2V to 6V and supports an extended temperature range from -55°C to +125°C. It is qualified under MIL-STD-883 standards, specifically levels 38535Q/M, 38534H, and 883B.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Hermetic ceramic packaging for harsh environment reliability
• Radiation-hardened design suitable for aerospace applications
• Extended industrial temperature operation capability

Buffers, Drivers, Receivers, Transceivers Applications

• Aerospace data bus systems
• Military electronic equipment
• Harsh environment signal buffering

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific qualification level required for your application, as this component is available under multiple MIL-STD-883 screening levels including 38535Q/M, 38534H, and 883B. Confirm that the non-RoHS status aligns with your project's regulatory requirements. Ensure the ceramic LLCC package footprint matches your PCB design constraints before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when radiation hardness and hermetic sealing are mandatory. It serves as a high-reliability alternative to commercial logic families. Consider the inverted output polarity and three-state control requirements during circuit design. Verify compatibility with the 2V to 6V operating voltage range for your system power rails.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the National Semiconductor MM54 series, which consists of radiation-hardened CMOS functions designed for the aerospace industry. The series includes various gates, flip-flops, and bus interfaces. These components are characterized by single-event latch-up immunity and total dose hardness, making them suitable for space missions and other demanding environments.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include the M54HC240 and M54HC245 from STMicroelectronics, which share similar radiation-hardened specifications and ESCC qualifications. Verify pinout compatibility and electrical characteristics against the original datasheet before substitution.