[SI-LIST] Re: AC overshoot
- From: chris.mcgrath@xxxxxxxx
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 7 Aug 2003 08:18:24 -0700
In the past, I have always gone to the manufacturer of the device to get this
information and it has invariably been in terms of a voltage value for both
overshoot and undershoot as well as a transient time limit that the
over/undershoot can last. I don't know if there is a 'best' way to extrapolate
this specification, but I agree that it is rare to find this parameter clearly
stated in a data sheet. My suggestion is go to the source on this one.
-Chris
> -----Original Message-----
> From: SUDHEER [mailto:sudheer_tiptur@xxxxxxxxxxx]
> Sent: Thursday, August 07, 2003 11:10 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] AC overshoot
>
>
> Hi ALL
>
> I have a quection on AC overshoot allowed for
> devices
>
> How to calculate this allowable overshoot values
> from the datasheets values ? (from Obsolute max
> ratings ) .
> Only few device datasheets will provide these
> values One of the xilinx application note says ,
> upto 2 V Overshoot/Undershoot is allowed
> provided it will not lost for 20ns to destroy the
> clamping diodes of the receivers
> I think we need to calculate the average current here
> !!!!
>
>
>
> The IBIS convention allows to enter these values
> , but i have not seen any IBIS model with these
> values
> *****************
> S_overshoot_high Static overshoot high voltage
> S_overshoot_low Static overshoot low voltage
> D_overshoot_high Dynamic overshoot high voltage
> D_overshoot_low Dynamic overshoot low voltage
> *******************
>
> Will be of great help , if you can send any
> technical Paper/Application notes to know more about
> this
>
>
> Regards
>
> SUDHEER
>
>
>
>
>
>
>
>
> ______________________________________________________________
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