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TCAN332: TCAN332DCNR

Anuraj nk
Intellectual 330 points
Part Number: TCAN332

Hi Sir,

   I am developing a system and using CAN protocol for the communication. I have to drive 144 Nodes in single CAN Bus. I have selected the CAN Transceiver part TCAN332DCNR. As per the analysis done, this part wont be able to drive 144 nodes. So I am using CAN repeater in the path. Part selected is AMIS-42770 from ON Semiconductor. 

Please find the attached block diagram

I have few queries regarding this interface :

1. Supply for TCAN332DCNR is 3.3Volt and for CAN Repeater is 5Volt. Will this be compatible or I have to use a level translator between. Please confirm ?

2. Can you suggest a prt from Texas instriments for the replacement of selected CAN repeter AMIS-42770  ?

Regards

Anuraj NK

   

  • 0
    TI__Guru 60042 points

    Anuraj,

    The way TI's 3.3V CAN transceivers are designed, they are able to work on the same bus as a 5V CAN transceiver, and work with the 5V CAN repeater as well. No translator necessary.

    There are 5V CAN transceivers in TI's portfolio as well, if you want to go that route. The receiver input resistance is the same so the node limitation due to leakage current is technically the same.

    Unfortunately TI doesn't have any CAN repeater products.

    Regards,

  • 0 in reply to Eric Hackett
    TI__Guru 62910 points
    Hi Anuraj,

    Adding on to Eric's comments, although a dedicated repeater IC is not offered by TI at this time, a standard CAN transceiver can be combined with external logic circuitry in order to implement this function. For an example implementation, you could review this reference design:

    www.ti.com/.../TIDA-01487

    This design introduces galvanic isolation as well, but the same principles could apply to a non-isolated application as well.

    Regards,
    Max
  • 0 in reply to Max Robertson
    Intellectual 330 points

    thanks for your information.