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From: Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: hobby electronics
Date: Sun, 7 Jul 2024 20:55:30 +0100
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On 07/07/2024 19:32, Don Y wrote:
> On 7/7/2024 10:43 AM, Edward Rawde wrote:
>> When I worked as a designer I came across fake parts a few times. One 
>> reel
>> if devices was SO8 and the devices were marked with the correct number 
>> but
>> the manufacturer didn't make that part in SO8. So it wasn't hard to 
>> spot the
>> fake. Another reel of devices did have the correct part number on the
>> correct package but it was anybody's guess what chip was actually in the
>> package.
> 
> I had a client contact me about a problem he was having with some
> other design (not one of mine).  Begrudgingly, I offered to help
> (I don't like having to troubleshoot other designs as you never
> know the quality of the design/designer).
> 
> It quickly became apparent that one device was bad in every sample.
> On closer inspection, there was no die *in* the package!

We once had a flashover event with a very expensive prototype 22bit ADC 
back in the late 80's where it vapourised the bond out leads. The chip 
was working really well right up to that point and we had a 6 sig fig 
linear ADC (intention was to replace bulk buy Solartron 7060s).

We decided honesty was the best course of action and the chip makers 
liasson guy admitted that if *they* hadn't tested it themselves before 
shipping it to us they could have believed that they forgot that step!

They gave us another chip and the things went into full production not 
long after they were able to produce them in bulk. Solartron were a bit 
surprised when one their best customers vanished completely.

-- 
Martin Brown