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DS90CF388: 5pin PLLSEL & internal PD/PU

Shuji Ishiwata
Mastermind 8240 points

Part Number: DS90CF388

Tool/software:

Hi All,


I have some questions about the DS90CF388.

(1) Is it better to connect 5pin PLLSEL directly to Vcc? Or can I pull it up via a resistor?
(2) What is the resistance value of the internal PD/PU?


Best Regards,
Ishiwata

  • 0
    TI__Mastermind 26750 points

    Hi Ishiwata,

    1. You could tie directly to Vcc, or use a 10 Ohm pullup resistor.

    2. The datasheet does not currently share the internal pulldown/pullup value. However, you can refer to the the schematic recommendations to work as intended.

    Best regards,
    Ikram