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TM4C1290NCZAD: Crystal selection

Kien

Expert 4011 points

Part Number: TM4C1290NCZAD

Hi,

Please help to check if I can use the below crystal with:

C1, C2 = 10pF

Rs = 2KOhm

Regards,

Kien

over 5 years ago

0 Charles Tsai over 5 years ago

TI__Guru**** 191766 points

Hi Kien,

I will suggest you provide a sample of the product to the crystal manufacturer. For best answer, they have the ability to measure and advise on bypass capacitors for their crystals. Can you provide the background why you choose C1/C2=10pF? In the datasheet, it says 12pF as the min. Otherwise, I don't really see a problem with the oscillator parameters you presented.

0 Kien over 5 years ago in reply to Charles Tsai

TI__Expert 4011 points

Charles,

Thanks for your advice.

The crystal manufacture recommends C1 and C2 to be 10pF to achieve a frequency deviation of -2ppm.

Customer has tried with the real HW (TM4C1290) and it worked, but they still want to ask us if there may be any issues with that.

0 Charles Tsai over 5 years ago in reply to Kien

TI__Guru**** 191766 points

Hi Kien,

No, I don't see an issue.

0 Kien over 5 years ago in reply to Charles Tsai

TI__Expert 4011 points

Thank you, Charles.