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SN74CB3T3245: SN74CB3T3245：The output level is higher than the supply voltage

Seasat Liu
Intellectual 1040 points
Part Number: SN74CB3T3245

hi All

SN74CB3T3245：The output level is higher than the supply voltage

We are replacing PI3C3245 with SN74CB3T3245.
In the case of VCC 2.5V power supply, the signal level on the A side is 3.3V, and the signal level on the B side is 2.9V instead of 2.5V, please help to see the reason, thank you!

pls see attach file which is test result and SCH

  • 0
    TI__Mastermind 43245 points

    Hi Seasat,

    Could you please add scope shots of the input wave as well as the power supply with the measurement tools on? This will help me understand what is happening at all these pins because I think this might be where the issue lies, but I'd like some data to confirm this. 

    Also for the test are you loading the board? If you are what current are you drawing?

    Best Regards,

    Parker Dodson