External Clock for TE0715 Module

[rouben_s]

Hi there,

I am using the TE0715 modules on a custom board and I provide the MGTREFCLKs from a SI5338 frequency synthesizer on my board. When generating the clock I have several options for the output driver of the SI5338 and for other projects I have used the LVDS option. But when I use the 1.8V LVDS for this design, the voltage swing on the output is below 1V. The only way I get the full 1.8V is by choosing the 1.8V CMOS on both A and B outputs. I would like to know what is the proper driver (I/O) type that I have to specify to interface with the GTX tile of the TE0715.


Thanks,
Rouben   

[JH]

Hi,

LVDS should work. On  TE0715 Si5338 CLK2 is configured by default to 125MHz with LVDS output. Does this work?

br
John