Why ESD Levels Differ Among Systems with Different MCUs in the Same Environment?

Why ESD Levels Differ Among Systems with Different MCUs in the Same Environment?

A washing machine product selected two different manufacturers’ MCUs with pin compatibility. During EMC certification, it was found that MCU A failed at 5kV, while MCU B could withstand up to 8kV, with all other components and environments being identical. Why do different MCU products exhibit varying ESD levels? The reasons behind this are not … Read more