40 MHz Crystal mandatory?

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hassan789
Posts: 156
Joined: Thu Jun 29, 2017 2:15 am

Re: 40 MHz Crystal mandatory?

Postby hassan789 » Tue Jul 25, 2017 2:10 am

gotit.
thanks so much

andrea.gottardo
Posts: 1
Joined: Thu Aug 03, 2017 3:57 pm

Re: 40 MHz Crystal mandatory?

Postby andrea.gottardo » Thu Aug 03, 2017 4:11 pm

Hello,

Are there detailed specifications about the requirements on tolerance and stability of the oscillator?
How we could have 10ppm, on long term (10 years), if the aging of the crystal gives no less than 1ppm per year of deviation ?
Even if I choose a crystal starting with 5ppm and aging of 1ppm after ten years It reach 15ppm!

Thank you.

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