RE: SN74LVC8T245 Logic Input Issues

vineetrvce

Hi Hattie,

My schematics look exactly the same. The Microntroller side is 3.3V and the SPI slave side could be 1.8V, 3.3V and 5V. My circuit is working when VCCA = VCCB = 3.3V. But when I change the VCCB = 1.8V or 5V, it does not work. Any ideas?

Regards,

Vineet.

over 10 years ago

0 Emrys Maier over 10 years ago

TI__Guru* 97046 points

Vineet,

I have split this question into our Voltage Translation Forum for the best support. I appreciate that you used our search function and found a thread that was on the same topic you wanted to ask a question - but unfortunately that was a very old post and our forums have changed a bit since then. The engineers on this forum are better equipped to help you with this issue.

For the apps engineers working on this, here is the original thread.

0 vineetrvce over 10 years ago in reply to Emrys Maier

Intellectual 565 points

I have added my findings to the thread mentioned above.

Logic

Logic forum

RE: SN74LVC8T245 Logic Input Issues