Hi,
I want to use a CDCLVC1106 to clock 4 Ethernet phys a Cyclone IV FPGA and a TI C28346 DSP on one board.
The clock frequency would be 25MHz. For the application (EtherCAT fieldbus) we need an oscillator with +-25ppm initial accuracy. I would like to use this one
http://www.hongkongcrystal.com/ewebeditor/uploadfile/20110224121444867.pdf from our preferred vendor.
This oscillator is available for LVCMOS in three output load versions 15pF/30pF/50pF. I'm not sure which version to choose. Would 15pF be sufficient? Can someone give me an advice please?
Thanks.
Rudolf