It was verified that, a 330 ohdl50 pF ESD contact discharge simulator met the IEC 801-2 requirements in 150 ps and 350 ps rise time test setups. This same ESD simulator using air discharge in a 150 s test setup, with a charge rolta e, between 2 and 8 i v had a peak current 2 times higfer and a rise time of 116 of the contact values. A five step design order is presented to achieve cost effective ESD equipment immunity desi . The key consideration for obtaining this %sign is the understanding of the common-mode (CM) ESD current path. A number of examples illustrate this key from the simple reset hardening to the advance concept of ESD differential termination of the converted transient and using a CM inductor to improve the CM rejection in the receptor.

Rationale for a new ESD standard which avoids the inconsistent test results between different ESD simulators which comply with the widely used IEC 1000-4-2 ESD standard is presented. Some of the deficiencies of existing ESD standards are limited control of peak current as a function of precharge voltage, inadequate bandwidth of the calibration target, no specification on the discharge current derivative nor the generated E and H fields, along with variances with the same test setup. Specific ESD test methods and limits are given for Consumer Products, Information Technology Equipment (TIE) and Telecommunication Equipment.

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