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SN65HVD234 and ISO13766 support

Alex T Wilson
Prodigy 325 points
Other Parts Discussed in Thread: SN65HVD234, SN65HVD255

Question from a customer:

"Can you provide me with some guidance regarding the SN65HVD234D CAN transceiver? I am trying to determine whether a common mode choke will be necessary for EMC compliance and general CAN bus transient immunity. The product must comply with ISO 13766 (earth moving machinery) transient immunity, transient emissions, conducted transients, and ESD standards. Does the fact that this transceiver is GIFT/ICT compliant mean that it can comply with ISO 13766 EMC and CAN network inter-operational requirements without the need for the choke? Does TI have any guidance on the bus interface for EMC compliance?"

  • 0
    TI__Mastermind 20590 points

    EMC compliance is a system level requirement and will depend heavily on PCB design, layout and the external components and system design as well as which EMC test standards you are trying to pass. The best option is to design your PCB will all possible external design circuits and use best PCB layout practices.  If you test and the external EMC component is not needed it is much easier to not populate it than have to spin another PCB.  Please see the attached PDF for some general recommendations on options for EMC design.  Another reference for these and other concepts is the TI CAN EVM: http://www.ti.com/tool/sn65hvd255devm .  It is populated with the SN65HVD255 CAN but will support all the 8 pin CAN transceivers and the concepts are generic to the CAN families.  The GIFT / ICT as referenced on the SN65HVD234 datasheet is for electrical conformance to the CAN physical layer standard ISO11898-2 and interoperability and is not an EMC reference. 

     

    0574.2013-06-11 TI CAN PCB Options.pdf

     

    -- Scott