ZHCSJ05C November 2018 – March 2019 THVD1419 , THVD1429
PRODUCTION DATA.
9.3.1 Electrostatic Discharge (ESD) Protection
The bus pins of the THVD14x9 transceiver family include on-chip ESD protection against ±16-kV HBM and ±8-kV IEC 61000-4-2 contact discharge. The International Electrotechnical Commission (IEC) ESD test is far more severe than the HBM ESD test. The 50% higher charge capacitance, C(S), and 78% lower discharge resistance, R(D), of the IEC model produce significantly higher discharge currents than the HBM model. As stated in the IEC 61000-4-2 standard, contact discharge is the preferred transient protection test method.
Figure 19. HBM and IEC ESD Models and Currents in Comparison (HBM Values in Parenthesis) The on-chip implementation of IEC ESD protection significantly increases the robustness of equipment. Common discharge events occur because of human contact with connectors and cables.