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Why is a switch that has a PMOS pull-up resistor not suitable for hot-swap or power sequencing applications?

April 26, 2017applications hot hot-swap PMOS power pull pull-up Resistor sequencing suitable swap Switch

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Why is a switch that has a PMOS pull-up resistor not suitable for hot-swap or power sequencing applications?

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The PN-junction in the PMOS pull-up resistor will forward the input signal to the Vcc pin at 0V due to power-off state or be delayed by the bypass capacitance and will cause problems with the system. Refer to Application Brief 39 and Application Note 52 for more details.