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SN65HVD30: Interface SN65HVD30 and SN65HVD32

Jonathan Geronga
Expert 7930 points
Part Number: SN65HVD30
Other Parts Discussed in Thread: SN65HVD32,

Hi Team,

Our customer would like to confirm if SN65HVD30 and SN65HVD32 can be interface to each other?
They have two circuit cards. One with a 65HVD30 and one with 65HVDC32, so will the RS-485 traffic between two different devices cause any communication issues?

Please let me know if you need more information.

Thanks!

Jonathan

  • 0
    TI__Guru 62910 points

    Jonathan,

    No issues here.  Both devices will interoperate with one another and with any other transceiver that is specified to meet RS-485 physical layer requirements.  It is very common for multiple nodes using different transceiver part numbers to communicate over a shared network.

    Regards,
    Max

  • 0 in reply to Max Robertson
    TI__Expert 7930 points

    Hi Max,

    Thank you for your response and support for my query.
    Another question: 
    What is the max data rate fora 65HVD30 device that has a point to point connection with the device 65HVD32? I see in the datasheet that 65HVD32 is specified at 1Mbps and 65HVD30 is specified at 26Mbps. What will be the data rate when these two interfaces with each other?

    Thanks!

    Jonathan


  • 0 in reply to Jonathan Geronga
    TI__Guru 62910 points

    Hi Jonathan,

    The data rate would be limited by the slowest transceiver.  The data rate specification for a device like this corresponds to the degree of slew rate limiting in the output driver, and so trying to run a "slow" transceiver faster than its maximum rate could result in increased jitter on the serial link as it becomes unable to reach full steady-state differential output voltage levels during a bit period.

    Regards,
    Max