RE: [IBIS-Users] Spec Clarification

From: Tim Kelpin <kelpin_at_.....>
Date: Mon Nov 13 2006 - 13:37:55 PST
 

Thanks Tom,

So what you are saying is will need to trace this part back to the lot it
came form and see if this was a typical lot.

As for my other questions?

1part bench test.

27C at min, typ and max operating voltage.

Max temp at min, typ and max operating voltage.

Min temp at min, typ and max operating voltage.

 

Tim 

 

 

  _____  

From: Tom Dagostino [mailto:tom@teraspeed.com] 
Sent: Monday, November 13, 2006 2:24 PM
To: kelpin@simtek.com
Subject: RE: [IBIS-Users] Spec Clarification

 

Tim

 

We have made many models by measuring sample parts and producing the min and
max corners by variations on the temperature and voltage of the sample.  The
problem with adding a fudge factor to get a wider variation to cover
potential process variations is determining where your sample part was in
the process spectrum.  Was it close to the min, or the max or was it really
a typical part?  If you apply the scaling factor to a min part you will
obviously get a different result than a max part.  So, we just model with no
additional scaling and label the model as such.

 

Regards,

Tom Dagostino
Teraspeed(R) Labs
13610 SW Harness Lane
Beaverton, OR 97008
503-430-1065
tom@teraspeed.com
www.teraspeed.com

Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827 

-----Original Message-----
From: owner-ibis-users@server.eda.org
[mailto:owner-ibis-users@server.eda.org] On Behalf Of Tim Kelpin
Sent: Monday, November 13, 2006 12:40 PM
To: ibis-users@server.eda.org
Subject: [IBIS-Users] Spec Clarification

Dear Madam or Sir:

 

I have been tasked to collect empirical data on one of our parts. 

 

I/O Power_clamp, pull_up and Pull_down data collection

 

According to the spec:

 It is permissible to use typical components and derated by voltage and temp
and optionally apply the X% factor. Data can be derived form typical
component measured over temp/voltage.

 

What is meant by a typical part? 

 

 

1. I have acquired 5 random parts from our inventory. 

 

I only need to test one part correct?

 

2. I will then run the Power_clamp, pull_up and Pull_down tests per the spec
at Vin min Vin typ and Vin max room temp.

3. Repeat at min temp

4. Repeat at Hi temp.

 

Am I interrupting this correctly?

Keep in mind that I have never done modeling or simulations before. This is
all new to me.

Best Regards,

Tim Kelpin

Product Engineer

Simtek Corporation

WORK : (719)590-6546

HOME :  (719) 651-2127

 

 

 





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Received on Mon Nov 13 13:38:55 2006

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