Re: The KenSmith Jinx

From: Tim Wescott (tim_at_wescottnospamdesign.com)
Date: 10/07/04 

Date: Wed, 06 Oct 2004 17:22:36 -0700

Ken Smith wrote:

> A sad story:
>
> Some of you know. I designed in the Philips PZ5128 "cool runner" CPLD. We
> all know what happened there. Some of you may not remember that Siliconix
> made a 2N4867A that was a very low noise JFET. It was, I believe, a
> selected 2N4867 part.
>
> Motorola used to make some nice RF power transistors that were just right
> to make a couple of watts near 90MHz and rund from a 28V bus. The "used
> to" is the clue as to what happened to them.
>
> I just designed in the 600V PTC circuit breaker from BC components. You
> can guess what I just found out today. Thats right, Vishay bought BC
> components and are cancelling that product line.
>
> Now here's how you can help:
>
> Do you know of any way to protect a signal output line against some idiot
> connecting it to 440AC or 600VDC yet meeting the following:
>
> Kind of like RS232 drive but:
> Output swing = +/- 12V
> Output Current = 0.25A peak 50mA avg.
>
> Rise and fall times need to be under 1uS.
> Normal power may be connected or not when the moron strikes.
> No fuses that must be changed.

So let's get this straight -- every component you design in goes
obsolete. So you're asking each of _us_ to recommend a favorite
solution, and the "winner" gets to see the components for his/her
favorite solution go obsolete?

Hmm. 

-- 
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

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