Hi, I wanna try to use vcxo in ug293 board. But when I try to find the product, the product ends.
Can I get recommendation of the replacement of tco-2111?
P.S Is there a reason that ug293 don't have the vcxo?
It does indeed look like Epson has discontinued this line of TCOs. This is unfortunately out of our control and sometimes does occur. I did a search and found a VCO from Crystek that is pretty close to the footprint for the Epson component and has the same pinout. They offer a 61.44MHz option that can be used to derive the required 245.76MHz clock for the AD9613 that is commonly used for the 250MSPS speed grade. It can also be used to derive a 122.88MHz clock as well. Please refer to the AD9523 data sheet and user guide for configuration options. You can find the Crystek data sheet here: http://www.crystek.com/crystal/spec-sheets/vcxo/CVPD-920.pdf.
The main clock path for the AD9613 evaluation board is the passive clock input. The AD9523 can optionally be configured to provide the clock, but is not the default path. The reference oscillator is not specifically called out in the user guide because there are many different possible configurations that can be used (although now the options are a little more limited due to the discontinuation of the TCO-2111). The Crystek has a more limited range of 50-125MHz so the options are a bit more limited. Please also note that currently the AD9523 shows that it is not recommended for new designs and the AD9528 is listed as an alternative. Unfortunately the AD9528 is not on the AD9613 evaluation board, but an AD9528 evaluation board could be purchased and with a few modifications could be used to drive the clock input of the AD9613 evaluation board .
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