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DS90UB914A-Q1: Power up order of UB913A-UB914 system

Nao
Genius 4905 points
Part Number: DS90UB914A-Q1


Hi, E2E members

UNIT A's power up is earlier than UNIT C in the following system.
Is there any problem with the power order?

NOTE: We use coax cable, but we don't use POC.

Regards,
Nao

  • 0
    TI__Genius 10475 points
    Hello,
    It is recommended to power up the serializer (DS90UB913A) first before the deserializer is powered up so the deserializer can lock to the data properly so the startup behavior is more deterministic. Otherwise the deserializer side may lock to something invalid in the absence of valid data especially in noisy systems.
    If the correct sequence is not followed during initialization, the DS90UB914A may need to be reset once valid signal is present at the input. Please refer to the DS90UB914A-Q1 datasheet section 9.1.2 (Powerup requirements and PDB pin) for more information.
  • 0 in reply to Palaniappan Manickam
    Genius 4905 points
    Hi, Manickam-san

    Thank you for your quick feedback.

    Regards,
    Nao