LEOAC244PT-D

Overview

The LEOAC244PT-D is a CMOS low-power octal bus buffer designed for aerospace environments. It operates from a 1.65 V to 6 V power supply with a 7 V absolute maximum rating. Each operator features a 3-state non-inverted output. The device operates over a temperature range of -40 °C to +125 °C and is housed in a plastic TSSOP-20 package using gold-wires and nickel/palladium/gold lead-finishing. It guarantees RML <1% and CVCM <0.1% outgassing, 50 krad (Si) total ionizing dose tolerance, and SEL-free performance up to 62.5 MeV.cm²/mg.

Feature Summary

• Qualified for aerospace environments with radiation hardness compliance
• Plastic TSSOP-20 package with whisker-free NiPdAu lead finishing
• Guaranteed low outgassing characteristics for space applications

Applications

• Aerospace electronic systems
• Space-ready rad-hard plastic products
• Radiation-tolerant bus buffering interfaces

Procurement Notes

Verify the specific ordering suffix against official STMicroelectronics documentation to confirm package type and qualification status. Ensure the component meets the required ST-LEO-specification for space readiness. Confirm that the NiPdAu lead finish and gold-wire construction align with project requirements for whisker prevention and reliability in vacuum conditions.

Selection Notes

Select this component when radiation hardness and low outgassing are critical for plastic package implementations. It offers a trade-off between footprint size savings and quality assurance compared to hermetic alternatives. Verify that the 1.65 V to 6 V operating range matches the system power supply constraints.

Part Context

The LEOAC244 belongs to the ST-LEO specification family, which provides rad-hard plastic products qualified for space applications. This series addresses the need for radiation tolerance without the cost and complexity of hermetic packaging. It is based on AEC-Q100 specifications adapted for aerospace reliability standards.

Replacement Considerations

Check for other LEOAC244 variants with different suffixes or packages. Hermetic 54AC244 equivalents offer higher radiation tolerance but differ in package technology.