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PCA9548A: I2C bus is unused pin.

Peter Chu
Prodigy 10 points

Part Number: PCA9548A

PCA9548 is 1 to 8 I2C bus switch device.  does the unused pin need to have pull-up resistor?

  • 0
    TI__Genius 10560 points

    Hi Peter,

    We generally recommend tying unused ports to Vcc through weak pull-ups (~100k). This provides a stable state in case the channel is inadvertently enabled.  This is not necessary for device functionality however.

    Thank you,
    Arya