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SN65HVD75DR

Tim Ta
Prodigy 20 points

Hello,

I would like to know if this part needs the fail safe bias resistors connected to A and B?

  • 0
    TI__Guru 62920 points
    Hi Tim,

    The SN65HVD75DR device implements internal failsafe biasing, so no external pull-up or pull-down resistors are needed. This feature is implemented by shifting the receiver's high-level and low-level thresholds so that they are both negative (rather than being centered around 0 V); you can see this in the VIT(+) and VIT(-) specifications. This ensures a high-level output on the R pin whenever the input differential voltage is close to 0 V. This could occur if the bus is undriven (idle), shorted, or if the data transmission cable is disconnected.

    Please let me know if you have any other questions.

    Regards,
    Max