Oscillator stability

Spartan-3 USB 2.0 Modules
1

I’m designing a daughter card for the XEM3010 with a part that requires a 25MHz clock with +/-50ppm stability.

Can I use the one of the PLL outputs to generate this clock or should I just us a discrete oscillator on the daughter card?

I can’t find anything in the documentation that tells me the part number for the XEM3010 oscillator nor its stability rating.

2

The XEM3010-1500P has an ECS, Inc. ECS-240-12-4X on it. (DigiKey XC1005-ND). The datasheet states the tolerance is +/- 50PPM at -10-+70 DEGC. I assume you are talking about the 48MHZ source oscillator? The PLL Im sure has quite a different jitter spec depending on the multipliers/dividers.