LSF0102: 1.8V to 2.8V converter

David Zhao

Part Number: LSF0102

UART between GPS and MCU needs 1.8V to 2.8V converter. Does LSF0102 support 1.8V to 2.8V converter? LSF0102 doesn't show it can support this.

Regards

David

over 6 years ago

0 David Zhao over 6 years ago

TI__Intellectual 1820 points

Attached is schematic. Please help comment. Thanks!

Regards

David

0 Clemens Ladisch over 6 years ago

Guru 243220 points

The LSF supports any voltage between the minimum and the maximum; the listed voltages are only examples.

0 David Zhao over 6 years ago in reply to Clemens Ladisch

TI__Intellectual 1820 points

Hi Ladisch
Thanks for quick response! Then how about the schematic design? Customer says UART has internal pull up resister, then no external pull up resisters.
Regards
David

0 Clemens Ladisch over 6 years ago in reply to David Zhao

Guru 243220 points

It does not matter if the pullup is internal or external.

Do both RXD pins (MCU and GPS) have a pullup?

0 David Zhao over 6 years ago in reply to Clemens Ladisch

TI__Intellectual 1820 points

Hi Ladisch
Noted. Thanks!
I will confirm with customer if both RXD pins have pullup.
Regards
David

0 Emrys Maier over 6 years ago in reply to David Zhao

TI__Guru* 96591 points

Hi David,
Just as an FYI, we recently released a video training series on the LSF family of translators. You might find it helpful.

training.ti.com/LogicMinute

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LSF0102: 1.8V to 2.8V converter