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What is the recommended circuit for 5V to 3.3V voltage-translation in PCI application using the PI5C32X245 switch?

April 26, 2017application circuit PCI recommended Switch Translation voltage

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What is the recommended circuit for 5V to 3.3V voltage-translation in PCI application using the PI5C32X245 switch?

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The PI5C32X245 must be populated on the live-insertion card between the 5V PCI connector and the 3.3V ASIC. This application requires adding a diode with 0.7V forwarding drop in series to the Vcc pin of PI5C32X245, adding a 10uf capacitor, a 0.47uf capacitor and a 5K resistor between the Vcc pin and ground PI5C32X245. The ground pins of the live-insertion card and the motherboard must be connected before any other pins. Otherwise the voltage from the PCI connector will go wild due to lack of ground reference and will damage the switch.