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TPS659037: Crystal oscillator for OSC16MIN

Kazuki Itoh
Genius 9595 points
Part Number: TPS659037

Tool/software:

Hi team,

My customer is considering to use the clock oscillator for OSC16MIN of TPS659037.

My cusotmer has checked the two threads below, but it's still unclear if using clock oscillator for OSC16MIN is allowed.

Could you please double check?

>3.Yes; it's OK to input the clock from the oscillator operating with 1.8V.

TPS659037: OSC16MIN inqueries - Power management forum - Power management - TI E2E support forums

 >We do not recommend using a 16MHz crystal. Please use the recommended 16.384MHz crystal oscillator as various other internal clocks are built off of this frequency.

TPS659037: Internal oscillator setting(OSC16M_CFG) - Power management forum - Power management - TI E2E support forums

Best regards,

Kazuki Itoh

  • +1
    TI__Mastermind 38550 points

    Hi Kazuki,

      Yes; using clock oscillator for OSC16MIN is allowed. Please follow the section copied below from datasheet.

    Thanks!

    Phil

  • 0 in reply to Phil Yi40
    TI__Genius 9595 points

    Hi Phil-san,

    Thank you so much.

    Does OSC16MIN have VIH and VIL DC characteristic specifications?

    My customer would like to use the crystal oscillator below.

    Could you please check if this oscillator is OK?

    SG-8018CE 16.384MHz TJHPA

    VOH（High-level output voltage）　MIN：1.62V

    VOL（Low-level output voltage）     MAX：0.18V

    Best regards,

    Kazuki Itoh

  • +1 in reply to Kazuki Itoh
    TI__Mastermind 38550 points

    Hi Kazuki,

      SG-8018CE is a oscillator which has much higher price than a crystal. 

      A 32-kHz square wave can be supplied to the OSC16MIN pin. This option is typically used in
    applications where the processor requires an accurate system clock and there is one already available
    in the system. In that case, the available 32-kHz clock can be provided to the PMIC and added to the
    boot sequence as an output. In this configuration, the OSC16MOUT and OSC16MCAP pins can be left
    floating, and the internal 16-MHz oscillator is bypassed. Bypassing the 16-MHz oscillator results in a
    lower quiescent current.

    Thanks!

    Phil