TL071/TL081

[Paul Perry]

At 10:07 PM 10/11/00 GMT, Bjorn Julin wrote:
> if C was lowest
>i dont really understand why a company would mark better (a,b)
>grades as worser grades (C)??
>And then sell them to a lower price!!!
>Or i have missundertod the whole thang!
>
You misunderstand marketing, BJ!

Works like this:
Some people will pay a lot for guaranteed high performance.
Some will only pay a little, no matter what, but happy with lower specs.

So, if there are 'too many' high spec, rebadge and sell as 'guaranteeed
to meet low specs' (which they do, so no fraud).
But, people wnting high specs are still forced to buy higher priced 
chips labelled 'high spec', so you get as much money as you can, and stay
in business.

Now, the high spec users can buy low spec chips & test them (but, this wd 
probably be too expensive to do0 or can buy low spec chips & hope thay are 
really high spec.. BUT, one day, they will REGRET this!!

Bob Pease covers this in "Troubleshooting Analog Devices"
He was buying parts with a guaranteed 'good' percent of 98%, and found that
EVERY tray of 100 parts had EXACTLY 2 bad, in the same position in each box!!
(from memory, might have the numbers wrong, but yhis was the principle)

paul perry Melbourne Australia