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TCAN4550: Schematic check

Tonyx.wu
Genius 3915 points
Part Number: TCAN4550

Please help check if this schematic is correct

TCAN4550原理图检查20231007.pdf

  • 0
    TI__Mastermind 33030 points

    I have reviewed the schematic and I have the following comments:

    - I don't know if the VIO voltage is 3.3V or 5V by the power net name of "VIO18_PMU" and whether this name implies that the voltage level is 1.8V.  The TCAN4550 only supports 3.3V or 5V voltage levels.  If 1.8V support is needed, the TCAN4551 should be considered, but this device does not support a crystal when VIO = 1.8V.

    - The crystal oscillator circuit has all the components needed to optimize the performance, in particular the series resistor between OSC1 and the crystal. The cap and resistor values may need to be adjusted for optimal performance as outlined in the TCAN455x Clock Optimization and Design Guidelines application Note. (Link)

    - The nINT and GPO2 pins have an open-drain architecture and require a pull up resistor to the VIO voltage.

    - Just a Note that the RST (reset) pin is active High, so it will need to be held low during normal operation

    Let me know if there are any additional questions.

    Regards,

    Jonathan