TRS3122E: PIN14/PIN15 Pull up

David Zhao

Part Number: TRS3122E

When UART signal is 1.8V. Then for TRS3122E, VL=1.8V and VCC=3.3V. Does PIN14/PIN15 support 3.3V pull up in this application? Thanks!

Regards

David

over 8 years ago

0 Hao L over 8 years ago

TI__Mastermind 25705 points

David,

FORCEON and and FORCEOFF~ pins are part of logic pins, so they're referred to VL. Please let me know if you have any questions.

Regards,

0 David Zhao over 8 years ago in reply to Hao L

TI__Intellectual 1820 points

Hi Hao

Customer board already come back and they use 3.3V pull up. They wander any risk about using 3.3V pull up and if it is a must to change to 1.8V pull up. Thanks!

Regards

David

0 Hao L over 8 years ago in reply to David Zhao

TI__Mastermind 25705 points

David,

The abs max of these pins are 6V. Using 3.3V logic should not damage the IC. Please let me know if you have any questions.

Regards,

0 David Zhao over 8 years ago in reply to Hao L

TI__Intellectual 1820 points

Hi Hao

Thanks for feedback!

Noted. So it is ok to use 3.3V pull up for FORCEON and and FORCOFF when VL=1.8V.

Regards
David

0 Hao L over 8 years ago in reply to David Zhao

TI__Mastermind 25705 points

Yes. It's OK.

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TRS3122E: PIN14/PIN15 Pull up