Figure 47. HBM JEDEC (left) and IEC61000-4-2 (right) pulses

The IEC61000-4-2 standard is more severe than the HBM ESD test and significantly increases the robustness of

the equipment. IEC61000-4-2 8 kV protections are commonly implemented.

The ST4E1216 and ST4E1240 furthermore increase the robustness of systems thanks to the dedicated

IEC61000-4-2 12 kV protections on bus terminals A and B. There are two methods of ESD testing: contact

discharge and air discharge. In the contact discharge method, the electrode of the test generator is held in contact

with an exposed conductor on the equipment under test (EUT). In the air discharge, the electrode of the generator

is moved from a distance towards the EUT until an arc occurs. The contact discharge offers the best

reproducibility and is chosen to be the test method for IEC61000-4-2.

The ST4E1216 and ST4E1240 comply with IEC61000-4-2 12 kV contact discharge.

ST4E1216, ST4E1240

Detailed description

DS14542 - Rev 2

page 23/31