• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 18 subscribers
  • Views 925 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN74CBT3245ADBQ vs SN74CB"3"T3245DBQ

Johnny Lau
Intellectual 2465 points

Team,

Customers application is attached – using a Fet Bus Switch as a 5V TTL to 3.3V LVTTL; the right part at U1 should be SN74CB3T3245DBQ, but somehow they used the wrong part SN74CBT3245ADBQ and passed our 4-corner test, and we have delivered some boards to customers.

They know the SN74CBT3245ADBQ with 3.3V power is out of the TI’s product spec (lower), but they want to know if we have any the potential risk for those boards they shipped.

Is the "3T" version the same silicon as the non "3" version?  I'm working to move them to change to the correct part for future builds but there are some already in the field and they need to do a risk assesment.

  • 0
    TI__Mastermind 46480 points

    Hi Johnny

      The CBT device will work at 3.3V. It is not the same silicon as the CB3T device and they are very different parts. The CBT device will have an output that is 1V below Vcc so the output Voh will be 2.3V. It will not hurt the CBT device to use it at 3.3V. so there is no issue with our part. I dont know about the part it is driving.

    My opinion is that if the units were working then they should remain working and should not degrade over time. This is only my opinion and should not be considered a guarantee. Any time the customer uses the part out of spec they void the warrantee.

    Hope this helps.