• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 21 subscribers
  • Views 365 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Issue in CDCE913PWR

sushruta shetty
Prodigy 100 points

Hi

We are using CDCE913PWR IC in our design,

We are using 25MHz crystal to generate reference clock for the PLL.

I am observing 1.3V DC Signal at pin no 1 and 14 of the IC. Could it be the problem in my crystal?

Thanks and Regards

Sushruta

  • 0
    TI__Mastermind 24205 points

    Hi Sushruta,

    Please ensure that crystal mode is selected on the part. See Page 17 of the datasheet: http://www.ti.com.cn/cn/lit/ds/symlink/cdce913.pdf

    Register 01h, Bits [3:2] = 00 for Xtal

    Also ensure that your crystal load capacitance Register 05h, Bits [7:3] are correctly programmed.

    Example: If crystal load capacitance = 10pF (from Xtal manufacturers datasheet), set crystal load cap register bits to 1Fh

    Probe pin 14 using a high impedance probe. You should see a 25 MHz waveform. Note that a low impedance probe could kill oscillations.

    Regards

    Arvind Sridhar