40193BDM

Overview

The National Semiconductor 40193BDM is a rad-hard presettable 4-bit binary up-down counter. It features radiation hardness against single event latch-up (SEL) and is immune to single event upsets (SEU) up to 36 or 119 MeV/cm²/mg. The device offers standardized symmetrical outputs and includes a 20 V quiescent current specification. It is fully tested for reliability in harsh environments.

Feature Summary

• Radiation hardened design ensuring resistance to single event latch-up
• Single event upset immunity up to specified energy thresholds
• Standardized symmetrical output configuration

Applications

• Rad-hard digital logic systems
• Spacecraft control units
• High-reliability counting applications

Procurement Notes

Verify the specific radiation tolerance levels required for your application against the datasheet specifications. Confirm that the package type matches your board layout constraints. Ensure compatibility with your system's voltage requirements before procurement.

Selection Notes

Select this component when radiation hardness is critical. Compare SEU immunity thresholds with mission requirements. Verify package availability and lead times for specialized rad-hard components.

Part Context

This part belongs to the family of rad-hard presettable counters designed for aerospace and defense applications where standard commercial parts would fail due to radiation exposure.

Replacement Considerations

Check for equivalent rad-hard counters from other manufacturers such as STMicroelectronics, ensuring similar SEL and SEU ratings are met.