Space applications require custom I/O and ESD protection solutions. Sofics proprietary ESD technology has been used for a number of aerospace projects. Our engineers delivered custom rad-hard ESD devices for TSMC 28nm, 65nm and 130nm CMOS technologies. The cells enable low power design in an extended temperature range. Different concepts are used to enable cold-spare interfaces. Low voltage triggered solutions are available for protection of thin oxide interface circuits.
We frequently get questions about the applicability of our ESD and I/O solution IP for space applications. Semiconductor devices that are used at high elevation or in space need special attention during the design phase. Sofics technology has been used for a number of aerospace projects. In this article we provide more background and some example cases.
The most common ESD protection for I/Os consist of two diodes. To cover all the different stress combinations a rail clamp is required. In this article we discuss another option. For many interfaces a local ESD protection clamp is actually a better option.
The conventional dual diode approach is used a lot as a simple ESD protection solution for all types of interfaces. However sometimes it causes issues.