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SP485EEN-L Datasheet(PDF) 8 Page - Exar Corporation |
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SP485EEN-L Datasheet(HTML) 8 Page - Exar Corporation |
8 / 12 page 8 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP48E,485E_00_2808 The Human Body Model has been the generally accepted ESD testing method for semiconductors. This method is also specified in MIL-STD-883, Method 3015.7 for ESD testing. The premise of this ESD test is to simulate the human body’s potential to store electro-static energy and discharge it to an integrated circuit. The simulation is performed by using a test model as shown in Figure 9. This method will test the IC’s capability to withstand an ESD transient dur- ing normal handling such as in manufactur- ing areas where the ICs tend to be handled frequently. The IEC-000-4-2, formerly IEC801-2, is generally used for testing ESD on equipment and systems. For system manufacturers, they must guar- antee a certain amount of ESD protection since the system itself is exposed to the outside environment and human presence. The premise with IEC1000-4-2 is that the system is required to withstand an amount of static electricity when ESD is applied to points and surfaces of the equipment that are accessible to personnel during normal usage. The transceiver IC receives most of the ESD current when the ESD source is applied to the connector pins. The test cir- cuit for IEC1000-4-2 is shown on Figure 10. There are two methods within IEC1000-4-2, the Air Discharge method and the Contact Discharge method. RC Device Under Test DC Power Source CS RS SW1 SW2 RS and RV add up to 330Ω for IEC1000-4-2. RC Device Under Test DC Power Source CS RS SW1 SW2 RV Contact-Discharge Model Figure 9. ESD Test Circuit for Human Body Model Figure 10. ESD Test Circuit for IEC1000-4-2 |
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