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TCA9538: Ioff function

NAOKI AOYAMA
Guru 11215 points
Part Number: TCA9538

Hello,

Our customer use the TCA9538.

The customer input SDA and SCL signal while VCC=0V.

Does it damage the device?

Does the TCA9538 have Ioff function?

Best Regards,

Naoki Aoyama

  • 0
    TI__Mastermind 49270 points

    Hey Naoki-san,

    This should not damage the part. The SDA/SCL pins on the device are high impedance. As long as you are not applying voltages higher than what the datasheet recommends, the device should be fine.

    I am assuming the SDA/SCL pins will be tied to a pull up resistor tied to Vcc and SDA/SCL will toggle from Vcc to GND. This should not be an issue.

    -Bobby

  • 0 in reply to BOBBY
    Guru 11215 points
    Hi Bobby,

    Thank you for your reply.
    I will feedback the customer this information.

    Thanks,
    Naoki Aoyama