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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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SP3222EB Arkusz danych(PDF) 14 Page - Sipex Corporation |
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SP3222EB Arkusz danych(HTML) 14 Page - Sipex Corporation |
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14 / 20 page  Date:02/27/05 SP3222EB/3232EB True +3.0 to +5.5V RS-232 Transceivers © Copyright 2005 Sipex Corporation 14 Figure 20. ESD Test Waveform for IEC1000-4-2 30A 0A 15A t=30ns t ➙ t=0ns Device Pin Human Body IEC1000-4-2 Tested Model Air Discharge Direct Contact Level Driver Outputs ±15kV ±15kV ±8kV 4 Receiver Inputs ±15kV ±15kV ±8kV 4 Table 3. Transceiver ESD Tolerance Levels For the Human Body Model, the current limiting resistor (R S) and the source capacitor (C S) are 1.5kΩ an 100pF, respectively. For IEC-1000-4-2, the current limiting resistor (R S) and the source capacitor (C S) are 330Ω an 150pF, respectively. The higher C S value and lower R S value in the IEC1000-4-2 model are more stringent than the Human Body Model. The larger storage capacitor injects a higher voltage to the test point when SW2 is switched on. The lower current limiting resistor increases the current charge onto the test point. |
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