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TCA9509 frequency

Gabriela Vera
Prodigy 40 points

Hello,

I can see on the datasheet that it supports 400-kHz Fast I2C Bus operating. And all through the datasheet they only mention that frequency.

Is it a given it works with others too? (I need it to work at 100Khz for my bus).

Best regards.

  • 0
    TI__Intellectual 780 points

    Hi Gabriela,

    That should fine.  The repeater itself is agnostic to the actual bus frequency.  The limiting factor for the bus frequency is determined by the time-of-flight delay through the repeater.  This just means that you can't operate the bus too fast, otherwise, the repeater delays might introduce setup/hold time issues.

    Best Regards,

    Jim