DS90UB913A-Q1: Power-Up sequencing changed from Rev.F to Rev.G

Part Number: DS90UB913A-Q1

Tool/software:

Hello,

Texas Instruments DS90UB913ATRTVTQ1 - DS90UB913ATRTVRQ1 - DS90UB913ATRTVJQ1

In 2020 something related to Power-Up sequencing changed from Rev.F to Rev.G (November 2020) and we need to provide more information about this to the customer.
Is this true?

Best Regards,
Fethi

  • Hi Fethi, 

    The difference between the revisions is documented in the Revision History located in section 4 of the datasheet as pictured below: 

    The change clarifies the power sequencing diagram that the voltage level threshold is PDB VIH rather than 90% of VPDB. Secondly, the local I2C workaround was updated to include an NCLK reset as the first step to the workaround if the t3 timing constraint is not met. 

    Best,

    Zoe

  • Hi Zoe,

    there was an internal misunderstanding regarding the datasheet change revision, on the cusotmer's side.

    The specific revision change they are interested in, and for which we require a deeper understanding of the impact, is the shift from revision E(2018) to F(2020) within the 2020 revision, focusing specifically on the impact of adding the maximum power up timing constraint  between VDD_ n and PDB (page 38 of the data sheet).

    Best regards,


    Fethi

  • Hi Fethi, 

    The power-up sequencing diagram was updated with Vdd_n to PDB to ensure reliable operation and link between serializer and deserializer. If this timing is violated, the below work around is recommended to be applied. 

    Best,

    Zoe