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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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IMP1817 датащи(PDF) 22 Page - A1 PROs co., Ltd. |
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IMP1817 датащи(HTML) 22 Page - A1 PROs co., Ltd. |
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22 / 36 page  4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP1 IMP1881166 Application Information Operation – Power Monitor The IMP1816 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power-down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 150ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. Figure 1. Timing Diagram: Power-Up Figure 2. Timing Diagram: Power-Down VCCTP (MAX) VCCTP VCCTP (MIN) VCC RESET tR tRPU VOH 1816_06.eps VCCTP (MAX) VCCTP VCCTP (MIN) VCC RESET tF VOL tRPD 1816_07.eps |
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