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TCA9548A: Pull Up Voltage for Downstream Ports

Ishwar Sharma
Prodigy 180 points

Part Number: TCA9548A

Hi

We are using part TCA9548ARGER in our new design. VCC is connected with 3.3V and Main communication lines are also at 3.3V level and pulled up with 3.3V supply. We need different Pull up supply (5V and 3.3V) at Downstream ports due to devices connected are with 5V and 3.3V.

Can we connect Pull up of Downstream ports to 5V and 3.3V supply to communicate with 5V and 3.3V devices. Two downstram ports are pulled up with 5V and 6 downstram ports are pulled up with 3.3V.

Please help here..

Best regards

  • 0
    TI__Expert 5360 points

    Hi Ishwar,

    If I am understanding the question correctly, does the image below show a good representation of what you are asking about:
     

    If so, than what you are referring to can work. If not do you have a schematic to show what you are referring to.

    Thank you,

    Arya