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CAN tranceiver SN65HVD252 via TS5A22362 2:1 switch

Bertram Brummer
Intellectual 1666 points
Other Parts Discussed in Thread: SN65HVD252, TS5A22362

Hello everybody,

I do have an application where the  SN65HVD252 CAN tranceiver is connected via one of our TS5A22362 switch to another sepc compliant CAN tranceiver (any device available because third party application).  The issue is that the short cirucit current specified with our tranceiver is 350mA and on the other hand the SPDT switch is only specified to a max current of 300mA.   Questions are as follow:

* Is the 350mA short circuit capabiltiy of our CAN tranceiver according to the  CAN.bus specification (I could ot find so far any spec like that)?

* if there is a spec. what is the required drive capability?

* also the 350mA short ciruit current is not required during operation and is most likely there to protect the device.  Therefore I would assume the 300mA specified for the swrich should be OK.

Any comment especially from pepole dealing with CAN IF applications is welcome.

Thanks in advance

  • 0
    TI__Guru 62910 points
    Hi Bertram,

    The 350 mA limit is just there for device protection, so if the current is externally limited to a lower value it will not be an issue for the transceiver. The current (2003) ISO 11898-2 CAN spec does not define a specific short-circuit current limit; it only recommends that a transceiver not be damaged by shorts to a battery voltage.

    Best regards,
    Max