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MCP2542WFDT CAN transceiver alternative

Alberto E.
Prodigy 201 points

Hi!!

Looking for alternatives to this CAN transceiver MCP2542WFDT, I would like to know if someone has seen something from TI equivalent, with the same footprint (3x2mm) and pinout ;)  If possible, with Vio Pin, or at least, that i can connect the Vio pin to 3V3 signal...  I have been looking for alternatives but I could not find anything...

  • 0
    TI__Guru 53555 points

    Hi Alberto,

    My recommendation for an 8-pin CAN FD transceiver with Vio support would be TCAN1044AV. Unfortunately, this is not available in a TDFN equivalent package (3x2mm), but the slightly larger VSON (3x3mm) offers a similarly small option.

    Let me know if this option looks good for you or if there are any other specifications that are important for your selection. If we've answered your question, please let us know by clicking the green confirmation button. 

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Prodigy 201 points

    Hi! 

    Thanks for the fast reply! In this case, the size is very important because I can't replace the 3x2 package... Disappointed If the IC does not have Vio pin it's ok but only if I can connect a 3V3 signal in the "NC" pin where the Vio pin should be.

  • 0 in reply to Alberto E.
    TI__Guru 53555 points

    Hi Alberto,

    While it won't be the same land pattern as the TDFN of the replaced device, we also offer TCAN1044AV in an SOT package (2.9x1.6mm). While the actual package size is small here, it will still be a different board footprint than the TDFN package of the replaced device. More info on this package can been seen here. 

    Any non-'V' variants of this or similar CAN devices from TI will have NC for what would be the Vio pin. Unfortunately, excluding the Vio feature does not expand the package options, as both variants are available in the same packages. 

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Prodigy 201 points

    That sounds great Eric!

    An smaller package looks fine and about the Vio pin, if I buy a "NC" ic instead of Vio variant, could I plug the "NC" pin to a 3V3 power source? The idea is design a PCB that is as compatible as possible with both models of ic. I mean, If I can connect a voltage source to the Vio pin and I put a "non Vio" version of the component, I suppose it will work (but with VDD voltages range instead of Vio one, of course). If it is "NC" i think it's the same that letting that pin floating. Am I right?

    Thank you so much!

  • +1 in reply to Alberto E.
    TI__Guru 53555 points

    Hi Alberto,

    Yes, the NC pin is a true electrical no connect. So this pin can be safely connected to 3V3 or any other voltage that would have been used for Vio without impacting device behavior/reliability. This interchangeability between versions is an intended feature of this pinout. Of course the Vcc rail will be used for digital logic for the NC devices as you described. 

    Regards,
    Eric Schott