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SA56614-30 Datasheet(PDF) 9 Page - NXP Semiconductors |
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SA56614-30 Datasheet(HTML) 9 Page - NXP Semiconductors |
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9 / 14 page  Philips Semiconductors Product data SA56614-XX CMOS system reset 2001 Jun 19 9 APPLICATION INFORMATION SL01355 SA56614-XX VDD GND VDD VSS VOUT RESET CPU Figure 14. Conventional reset application Small changes in supply current will occur when the SA56614 asserts or releases a reset. In some cases this can cause oscillations of the device. This can present a problem, particularly where high impedance VDD sources are employed. Figure 15 shows how this may occur. SL01356 SA56614-XX OUTPUT R12 R11 VSUPPLY A VDD VSS CURRENT CHANGES Figure 15. High impedance supply operating problems Significant voltage variations of VDD may occur when the device is operated from high impedance power sources. When the device asserts or releases a reset, VDD variations are produced as a result of the voltage drop developed across R11 due to the current variations through the resistor R11 (representing the supply impedance). If the VDD variations are large, such that they exceed the Detection Hysteresis, the output of the device can oscillate from a HIGH state to a LOW state. The user should avoid using high impedance VDD sources to prevent such situations. |
Similar Part No. - SA56614-30 |
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