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TXB0108 Connection Bug

Anoop Thomas
Prodigy 20 points
Other Parts Discussed in Thread: TXB0108

Hello all,

I am using TXB0108 for voltage translation purpose for interfacing between 3.3V and 1.8V signals.

One side is a BMC (3.3V level signals) and the other side is CPLD (1.8V level signals).

Board is fabbed and assembled and that's when I found out about the bug. VCCA<= VCCB which fails in my case.

I connected 3.3V on the VCCA and 1.8V on the VCCB.

What will be the effect of having VCCA greater than VCCB on the working of the device? 

Enable signal is connected to the VCCA input directly.

Is there any work around for this bug or if there is any other device with same footprint that allows VCCB to be less that VCCA.. (TXB0108PWR: TSSOP20)


Regards,

Anoop T

  • 0
    TI__Expert 6335 points
    Anoop,

    Unfortunately there is no work around and no footprint equivalent device without the VCCA <= VCCB requirement.

    With VCCA > VCCB, the device sees through current. In the short term this is not a problem, but long term it can cause damage.

    Best Regards,
    Nirav