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TCA9554: By-pass capacitors recommendation

Shinya Sawamoto
Expert 5260 points
Part Number: TCA9554

Hello,

Let me ask what are the by-pass capacitors recommendation for TCA9554.
I found that there are 2 by-pass capacitors connection recommended on the datasheet but can't find the best value combination.
Could you tell that?

Thanks in advance,
S.Sawamoto

  • 0
    TI__Guru 62910 points

    Sawamoto-san,

    Typically a 0.1-uF capacitor is sufficient for this device.  Sometimes multiple capacitors of different values or package sizes are combined in parallel in order to provide a low impedance across a broader range of frequencies, although this would depend on the expected noise on the power rail and capacitor-specific parameters like the expected self-resonant frequency.

    Regards,
    Max