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TXS and TXB in parallel for redundancy.

John Sobtzak1
Prodigy 20 points


Hi, 

I am using the TXB and TXS series parts to connected a 1.8V device to a 3.3V device on multiple interfaces.  SPI and UART using the TXB and I2C using the TXS.  I am trying to make the design robust in the event of one of the voltage translators failing.   For both chip series, can two of them be placed in parallel on the same interface lines and get along with each other.  I am concerned that a race condition might  be created resulting in one device's output driving the other's input and vice versa, creating a loop and burning out a device.

Please advise.  Thanks!

John

  • 0
    TI__Expert 6430 points

    Hi John

    The results will depend on backend two device state. If these two devices behavior is similiar ( as source or sink at the same time), it could be fine. But if logic is not similar, parallel connection can not be used.

    Best Regards

    Lawrence