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Subject:	Re: RoHS burden
From:	"Upton, Shawn" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Upton, Shawn
Date:	Mon, 14 Dec 2009 10:58:56 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (45 lines)

Maybe?

I have to wonder if the company wanted all parts qualified just in case
they change their minds half-way into the production run.  Ie, 10k was
originally used, and then 12k was found to be a better value.  Plus, it
might bode well for other projects ("Well, all these parts are known to
be good, so just use these parts in this design").

Shawn Upton, KB1CKT
Test Engineer
Allegro MicroSystems, Inc
[log in to unmask]
603.626.2429/fax: 603.641.5336

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Monday, December 14, 2009 10:47 AM
To: [log in to unmask]
Subject: Re: [TN] RoHS burden

I'm sorry, but wasn't the original question regarding requirements like
testing every value in a series for a material content breakdown?  
I am not talking screening every order, where you may catch bad batches
that don't meet the spec stated, but rather, reporting what the actual
expected material content is for a part series like an 0603 5% thick
film resistor.  
Would a 51 ohm resistor really have any different measurable material
content from a 75 ohm, or a 1K ohm, for that matter, if all of them were
from the exact same manufacturer, and same resistor series datasheet?
There are thousands of values.  How can we really expect the resistor
company to provide individual breakdowns/test results for each of 1000's
of values of a part they are selling for .01 cent each? 

Genny 

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