• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 20 subscribers
  • Views 503 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.

Why 74LVCH16T245 VCCA and VCCB get shorted

Fredy Yu
Prodigy 30 points
Other Parts Discussed in Thread: TXB0101

I connected the 5V to VCCB and 3V3 to VCCA, after that I found the 5V was shorted with the 3V3. Why it happened?

  • 0
    Intellectual 490 points

    I had the same problem with a 74LVC1T45 connected the same way: 5V to VCCB and 3.3V to VCCA.  I'm not sure if the problem was that I didn't have pull-up/down resistors on my input signal line, as the datasheet states that all inputs must be a defined HIGH or LOW state or excessive Icc currents may result.   This could be something for you to check if it makes any difference.

    I switched to a TXB0101 and have not had problems with it. 

  • 0 in reply to Aaron Ridinger
    Prodigy 30 points

    Hmmm.....I found that the non-soldered 74LVCH16T245 chips have VccA tied to VccB.