To ensure repeatability, the standards mandate specific equipment and a defined test circuit.

2.1 Required Equipment

• ESD Pulse Simulator & DUT Socket: The core of the apparatus is a simulator capable of generating pulses that conform to the required waveform characteristics.
• Oscilloscope: Must have a minimum single-shot bandwidth of 350 MHz and a minimum visual writing speed of 4 cm/ns.
• Current Probe: Requires a minimum pulse-current bandwidth of 350 MHz, with 1 GHz recommended. A maximum pulse-current rating of 12 amperes is also recommended.
• Evaluation Loads:
  • Shorting Wire: An 18 AWG tinned copper wire is used for short-circuit waveform verification.
  • Checkout Resistor: A 500 ohm (+/-1%), 1000 volt, low inductance resistor is used for initial system checkout and periodic recalibration.

2.2 Equivalent MM ESD Circuit

The test method is based on the typical equivalent circuit shown below (as depicted in Figure 1 of the standard):

• A High Voltage Pulse Generator charges a 200 pF (+/- 10%) capacitor (C1).
• A switch (S1) discharges the capacitor into the Device Under Test (DUT), which is placed between Terminal A and Terminal B.
• A second switch (S2), placed in parallel with the DUT socket, is closed 10 to 100 milliseconds after the pulse to ensure the DUT socket is not left in a charged state.
• The performance of the simulator is noted to be highly influenced by parasitic capacitance and inductance, and precautions must be taken to avoid recharge transients.
• The standard explicitly prohibits achieving dual polarity by reversing Terminals A and B.