CDCE925: Device recommendation to support 5 outputs

Jacky Wang(QD)

Part Number: CDCE925
Other Parts Discussed in Thread: CDCI6214, LMK03318

Hi Experts,

Our customer is looking for a 5 output clock device like CDCE925, but the fPR is less than +/-50ppm, do you have any better suggestions? Thanks a lot!

Requirements:

1. Out1/2, 20MHz, fPR<+/-50ppm

2. Out3, 25MHz, fPR<+/-50ppm

3. Out4, 50MHz, fPR<+/-50ppm

4. Out5, 100MHz, fPR<+/-50ppm

over 7 years ago

0 Alan O over 7 years ago

TI__Mastermind 32575 points

It's no problem to achieve < 50 ppm by selecting a proper crystal as a PLL reference that meets this frequency tolerance spec.

Other devices to consider is CDCI6214 or LMK03318, depending on performance vs. power needs. I suggest either of these if you need any differential output clocks.

Alan

0 Jacky Wang(QD) over 7 years ago in reply to Alan O

TI__Genius 11630 points

Hi Alan,

Thanks for the reply, do you have any recommendations for the crystal if customer wants to use with CDCE925 to achieve <50ppm fPR?

0 Alan O over 7 years ago in reply to Jacky Wang(QD)

TI__Mastermind 32575 points

Here's an part number
7M-20.000MAHE-T
20MHz ±30ppm Crystal 12pF 4-SMD, 3.20mm x 2.50mm
You can find an equivalent spec from a different crystal vendor, if you prefer.

Alan

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CDCE925: Device recommendation to support 5 outputs