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PCA9306: Visteon Wireless BMS Schematic Review

Jack Roy
Intellectual 1111 points
Part Number: PCA9306

Hi, just wanted to get a quick schematic review for a Wireless BMS for Stellantis by Visteon. The application is simply shifting 5V I2C to 3.3V I2C and looks good to me but I wanted to get another look.

  • +1
    TI__Guru 59890 points
    PCA9306 U871
    Checked Status (Good, Bad, ?) Comments
    Schematic pinout matches datasheet pinout Good
    Enable pin tied to Vref2 for translation mode Good
    200k limiting resistor present Good
    SDA/SCL pins match SDA/SCL schematic net names Good
    External pull ups present on both sides of PCA9306 Good
    Local decoupling caps Good

    From what I can see, everything looks good to me.

    -Bobby

  • +1
    Guru 282290 points

    The maximum I²C communication frequency depends on the resistor values and on the total bus capacitance. The latter is hard to estimate; just check the waveform with an oscilloscope.