FreeLists / si-list / [SI-LIST] Re: SSN Vs Load cap

["Sabyasachi Mohapatra" <sabbu1981@xxxxxxxxxxx>]

It is pretty simple.
as u increase the load cap with same drive strength of driver,
rise or fall slew will degrade.
As the buffers will be switching slower now, dI/dt will be less,
rate of change of current though package inductor will be less.
So less SSO noise.

--- In si-list@xxxxxxxxxxxxxxx, Canes Venatici <starsilic@...> wrote:
>
> Hi all,
> I couldn't understand why if load capacitance is increased, SSN is 
reduced (as the recommendation is increased SSO index, more signal 
pads can be accommodated by power pads).
> As di/dt is directly proportional to load cap, increasing the load 
causes more drop in parasitic inductance and SSN should increase.
> Could anyone clarify.
> Thanks,
> Canes
> 
> 
> 
> 
> 
> 
>  
> 
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