Rise time of the frequence to calculate crosstalk.

[danhphuong123]

Dear Fedevel,
Some document only for us know value of frequency but it don't show value of rise time. How to find out the value of rise time when we know frequency to calculator crosstalk?

[robertferanec]

Can you give an example? Usually rise time is one of the important parameters and usually it is in datasheet. You can not calculate rise time from frequency. In most cases the minimum / maximum rise time is defined by technology used to manufacture the chip / interface / pin. Depends on the chip / interface / pin, sometimes you can control rise time e.g. by setting up control registers inside MCU/CPU.