Unlike the HBM, MM, and CDM, ESD tests that apply to component level integrated circuits, the IEC61000-4-2 is a system-level ESD testing and performance standard that pertains to the end equipment. The MAX3243E device is designed to enable the manufacturer in meeting the highest level (Level 4) of IEC61000-4-2 ESD protection with no further need of external ESD protection circuitry. The more stringent IEC test standard has a higher peak current than the HBM, due to the lower series resistance in the IEC model.

Figure 10-4 shows the IEC61000-4-2 model, and Figure 10-5 shows the current waveform for the corresponding ±8-kV Contact-Discharge (Level 4) test. This waveform is applied to a probe that has been connected to the DUT. On the other hand, the corresponding ±15-kV (Level 4) Air-Gap Discharge test involves approaching the DUT with an already energized probe.

Figure 10-4 Simplified IEC61000-4-2 ESD Test Circuit

Figure 10-5 Typical Current Waveform of IEC61000-4-2 ESD Generator