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TCAN1042V-Q1: TCAN1042V-Q1 Application Note & Isolated application.

BJ Han
Expert 2035 points
Part Number: TCAN1042V-Q1
Other Parts Discussed in Thread: ISO1050

Hi TI,

I have found a replacement TI product(TCAN1042V-Q1) for the NXP TJA1145.

My required function is a product with CAN Wake up function.

Is the TCAN1042 product suitable?

We also inquire whether the isolated cases and examples are available.

Please help me with my question.

  • 0
    TI__Mastermind 20820 points

    Hi BJ,

    The TJA1145 is a 14 CAN transceiver with partial networking (PN). We currently do not have a device to compete with the TJA1145 but it is on our creative backlog road map as a future device.

    The TCAN1042 does support a wake up (WUP) feature though so it may work for your customer. PN and WUP are two different things though so you should confirm with your customer what exactly it is that they require. The way WUP works is when the TJA1042 is in standby mode (STB) it can be woken up by a dominant, recessive, dominant bit sequence on the CAN bus lines that is longer than the filtered time requirement of 500ns and shorter than 1.85us. If there were 10 CAN nodes on the CAN bus that all had this feature all of the CAN nodes would wake up since they would all be listening for the same wake up pattern. WUP is defined in the ISO 11898-2 (CAN) standard and most CAN transceivers that have this feature are aligned to the standard.

    PN is different in that it will wake up the CAN node but it is looking for a specific identifier and will not wake up on anything it sees on the bus which is why I said earlier it is important to understand what the exact customer requirements are. If this is not clear to you just let me know and I will provide a deeper explanation of devices like the TCAN1042 and devices like the TJA1145.

    We have one isolated CAN device in the ISO1050. This is a galvanically isolated CAN transceiver but it does not have the same feature set as the TCAN1042. Isolation can be done discretely though and depends, again, on your customers requirements. Please help me understand their requirements better and we can work towards a solution together.