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TCAN1463-Q1: applicaion circut of CAN FD Transcevier

Eiji Aoki
Prodigy 10 points
Part Number: TCAN1463-Q1

I will use 2 TJA1463 at onece on board.    Can I connect both INH(8) together if current load to GND is enough low?   Data sheet shows (Vsup - VIHN)<1V at 6mA load.   

  • +1
    TI__Mastermind 25596 points

    Hi Eiji,

    When you say "enough low," do you mean a strong enough pull to GND such that it is greater than 6 mA?

    To answer part of your question directly: yes, multiple INH pins which share the same VBAT/VSUP level are able to be connected together. They operate in an open-drain (or high-side switch style) configuration. Thus, they'd be in parallel to GND.

    Generally, for pull-downs on INH, we recommend something like 100kΩ as a pull-down to GND to make the INH edges quicker. What sort of load are you looking to apply?

    Best,

    Danny

  • +1
    Prodigy 10 points

    Hi Danny,

    Thank you so quickly.
    I have 50kohm pull down.  no greater current load than 6mA.
    In this case, can I connect INHs together from TCAN1463-Q1 without external OR.

  • 0 in reply to Eiji Aoki
    TI__Mastermind 25596 points

    Eiji,

    From your description, yes, this should work fine. No need for an external logic device for this configuration. INH can only drive HIGH but cannot pull to GND; only the external 50kΩ pull-down resistor will do this.

    Best,

    Danny

  • +1 in reply to Danny Bacic
    Prodigy 10 points

    Thank you so much for your quick advices.