[SI-LIST] Re: Would you follow the overshoot specs of the datasheet?

The detrimental effects of repeated overshoot violations have been 
discussed here at length in the past.  My advice is that if you care 
about the reliability of your product, then limit overvoltage stress 
applied to the parts you use. 

Steve.
liuluping 41830 wrote:
> Hi all:
>
>    This questions comes from yesterday's  topic "DDR2 Trace Length Margin" 
> which Jeff, Brian,Tom and many experts give very wonderful explains. Maybe 
> the main problem is whether to follow the very tight specs , length mathch is 
> one aspect,and the overshoot is another one which is often more trouble to 
> deal.
>    For example , a chip which contains 667Mbps DDR2 and 33MHz PCI interfaces 
> ,the datasheet said that all the overshoot on the digital interface should 
> less than +/-0.7V,in despite of 
> the frequency,overshoot time ,would you follow this spec? How do you thinks 
> about this?
>
>    Regards,
>
>      LIU Luping
>    
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