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SN65HVD231: SN65HVD231 can bus question

Part Number: SN65HVD231

Dear Sir,

I have some question as below, could you help to check it, thanks!

1.What condition to choose Standard Termination or Split Termination.

2.If we have Standard Termination and Split Termination in can bus, have any issue?

3.If we have 3.3V and 5V in can bus, have any issue?

  • Hi Vincent,

    1. SPILT is used to stabilize the common mode of the bus by providing a Vcc/2 DC voltage to the center point between a split termination scheme, this helps lower emissions (see this link for more information: ). Emissions is a measure of common mode noise which is generated by mismatches is CANH and CANL which causes shifts in the common mode voltage level. SPLIT helps to stabilize this by providing that additional Vcc/2 DC to the common mode to hold the common mode stable.

    2. No, the termination seen by the transceiver in standard configuration and split configuration is the same.

    3. No, 3.3V and 5V CAN are compatible.

  • Dear Sir,

    Thanks you for your reply.

    Can you let me know what is difference Komfort and Beispiel?

    Are there compatible?

    The attached file for your reference.

    Can Bus Komfort and Beispiel.docx

  • Hi Vincent,

    This looks like low speed fault tolerant CAN from the signal architecture. Is this what you are trying to design for? Classical CAN and LSFT CAN are not compatible with each other.