LSF0102: How do I set the voltage of Verf_A and V_PU of LSF0102

Seasat Liu

Part Number: LSF0102

I want to achieve voltage conversion from 1.8v to 2.5v.

How do I set the voltage of Verf_A and V_PU of LSF0102?

The datasheet (Table3) and EVM document (Table2) require for V_PU >Vref_A + 0.85.

If I set Vref_A is 1.8v. V_PU voltage will exceed 2.5V

0 ShreyasRao over 6 years ago

Hi Seasat,

The VrefA needs to be set to 1.8V and VrefB to 5V. This will satisfy the requirement of VrefB > VrefA +0.8.

and the pullup voltage will be set to either 1.8V or 5V on the IO ports as required on either side for translation.

Watch the videos which explains the translation using the LSF here :

0 Seasat Liu over 6 years ago in reply to ShreyasRao

hi Shreyas

Thanks a lot

in other words：
When Verf_A is 1.8V and VrefB is 3.3V, can the chip convert between 1.8V level and 2.5V level?

0 ShreyasRao over 6 years ago in reply to Seasat Liu

Yes, it can.

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