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SN65HVD78: Hot Swap Application

Part Number: SN65HVD78

Hi Team,

Can SN65HVD78D support hot swap? Is there any risk in hot swap application?

Beat Regards,
Tom Liu

  • Liu,

    There is no risk from a power-up standpoint, as there is no power-up sequencing necessary on an RS485 transceiver. A general risk for hot-swap is causing glitches/transients on the bus, but there haven't been any reports of this from other customers using this device, and the bus structure is designed so that the bus pins are high impedance until they are driven by the transmitter and the driver and receiver are enabled. 

    Please let us know if you have any other questions.


    Eric Hackett