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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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SP3223EB Arkusz danych(PDF) 13 Page - Sipex Corporation |
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SP3223EB Arkusz danych(HTML) 13 Page - Sipex Corporation |
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13 / 25 page  13 Date: 6/2/04 SP3223EB/3243EB +3.0V to +5.5V RS-232 Transceivers © Copyright 2004 Sipex Corporation Since both V+ and V– are separately generated from VCC, in a no–load condition V+ and V– will be symmetrical. Older charge pump approaches that generate V– from V+ will show a decrease in the magnitude of V– compared to V+ due to the inherent inefficiencies in the design. Figure 20. AUTO ON-LINE® Timing Waveforms RECEIVER RS-232 INPUT VOLTAGES STATUS +5V 0V -5V tSTSL tSTSH tONLINE VCC 0V DRIVER RS-232 OUTPUT VOLTAGES 0V +2.7V -2.7V S H U T D O W N The clock rate for the charge pump typically operates at 250kHz. The external capacitors can be as low as 0.1 µF with a 16V breakdown voltage rating. |
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