Suggested new Marketing Term for Datasheets

Genome · Mar 20, 2006

Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

DNA

Joerg · Mar 20, 2006

Hello Genome,

Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

Or 'Pyrotechnical Data'.

Regards, Joerg

John Larkin · Mar 20, 2006

Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

DNA

Fuses. Krytrons. Detonators. Anything else?

John

Tim Shoppa · Mar 20, 2006

Genome said:
Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

My favorite was the graph of "Number of pins remaining vs Number of
socket insertions" for the Signetics 25125 WOM.

Tim.

Spehro Pefhany · Mar 20, 2006

Fuses. Krytrons. Detonators. Anything else?

John

Thermal cutoffs.

Best regards,
Spehro Pefhany

Terry Given · Mar 20, 2006

Spehro said:
Thermal cutoffs.

Best regards,
Spehro Pefhany

spring washers

Cheers
Terry

Rene Tschaggelar · Mar 20, 2006

Genome said:
Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

These 'Absolute Maximum Ratings' have a different
meaning for different people anyway.
Eg physicist colleagues of mine consider 'Absolute
Maximum Ratings' as safety margins that can easily
be exceede by 20%. Repeatedly.

Rene

martin griffith · Mar 20, 2006

My favorite was the graph of "Number of pins remaining vs Number of
socket insertions" for the Signetics 25125 WOM.

Tim.

Yep, one of the Classics
but my current favorite graph

"Approximate number of pirates versus the average global temperature
over the last 200 years".

It does not seem to include the Somalia based pirates though. Maybe
this is too recent to cause a downturn in Climate change

from
http://www.venganza.org/

martin

Tim Williams · Mar 21, 2006

Rene Tschaggelar said:
Eg physicist colleagues of mine consider 'Absolute
Maximum Ratings' as safety margins that can easily
be exceede by 20%. Repeatedly.

They must be used to tubes. ;-)

Tim

JeffM · Mar 21, 2006

my current favorite graph

"Approximate number of pirates versus the average global temperature
over the last 200 years".
It does not seem to include the Somalia based pirates though.
Maybe this is too recent to cause a downturn in Climate change
martin griffith

Perhaps they only counted pirates with IQs above room temperature.
http://news.google.com/news?q=USS-Cape-St-George+USS-Gonzalez

Robert Baer · Mar 21, 2006

Tim said:
My favorite was the graph of "Number of pins remaining vs Number of
socket insertions" for the Signetics 25125 WOM.

Tim.

I think i have a copy of that somewhere.
Could it be legally posted (their copyright was on it as i remember)?

Tim Shoppa · Mar 21, 2006

Rene said:
These 'Absolute Maximum Ratings' have a different
meaning for different people anyway.

I consider them a personal challenge set to me by the manufacturer.

Like the pair of "one size fits all" pants, that ripped after only 4
people!

Or the bomb-proof trash containers that the local government buys, that
are supposed to contain a stick of dynamite exploding. Now THAT sounds
like a dare to me!

Tim.

Keith · Mar 21, 2006

I think i have a copy of that somewhere.
Could it be legally posted (their copyright was on it as i remember)?

Jack Ganssle has a copy on his embedded web site:

http://www.ganssle.com/misc/wom1.jpg
http://www.ganssle.com/misc/wom2.jpg

I liked the INPUT PROTECTION paragraph (remember, this came out in
the early '70s).

Terry Given · Mar 21, 2006

Tim said:
I consider them a personal challenge set to me by the manufacturer.

Like the pair of "one size fits all" pants, that ripped after only 4
people!

Or the bomb-proof trash containers that the local government buys, that
are supposed to contain a stick of dynamite exploding. Now THAT sounds
like a dare to me!

Tim.

A rep from Semikron once proudly announced their new "rupture proof"
IGBT modules. We got one, attached it to a PCB with 6.6mF bus caps,
shorted the other device, cranked it up to 900V and turned it on. The
package didnt rupture but the assembly leaped 12" or so into the air.

So we did it again, but sat an anvil on top of the PCB. BLAMMO, it
destroyed itself completely, spraying "japanese snot" (we used Fuji
IGBTs for many years hence the term) everywhere. The rep was suitably
embarassed, and somewhat scared

Cheers
Terry

Jim Thompson · Mar 21, 2006

A rep from Semikron once proudly announced their new "rupture proof"
IGBT modules. We got one, attached it to a PCB with 6.6mF bus caps,
shorted the other device, cranked it up to 900V and turned it on. The
package didnt rupture but the assembly leaped 12" or so into the air.

So we did it again, but sat an anvil on top of the PCB. BLAMMO, it
destroyed itself completely, spraying "japanese snot" (we used Fuji
IGBTs for many years hence the term) everywhere. The rep was suitably
embarassed, and somewhat scared

Cheers
Terry

Sounds like the time I burned an extension cord the whole length of a
lab bench... burned across the table just like a dynamite fuse ;-)

...Jim Thompson

Robert Obermayer · Mar 21, 2006

Terry said:
A rep from Semikron once proudly announced their new "rupture proof"
IGBT modules. We got one, attached it to a PCB with 6.6mF bus caps,
shorted the other device, cranked it up to 900V and turned it on. The
package didnt rupture but the assembly leaped 12" or so into the air.

So we did it again, but sat an anvil on top of the PCB. BLAMMO, it
destroyed itself completely, spraying "japanese snot" (we used Fuji
IGBTs for many years hence the term) everywhere. The rep was suitably
embarassed, and somewhat scared

Cheers
Terry

Sounds like what happened to a induction heating setup when i put in the
IR2153 the wrong way.
Everything powered up fine but nothing happened, then i noticed that i
forgot to put the dc link breaker in, which i did then.
The system had a 12mf 350v dc bus cap and like 300v on it.
The 2153 was gone to say it that way.

Robert

mrdarrett@gmail.com · Mar 21, 2006

Terry said:
A rep from Semikron once proudly announced their new "rupture proof"
IGBT modules. We got one, attached it to a PCB with 6.6mF bus caps,
shorted the other device, cranked it up to 900V and turned it on. The
package didnt rupture but the assembly leaped 12" or so into the air.

So we did it again, but sat an anvil on top of the PCB. BLAMMO, it
destroyed itself completely, spraying "japanese snot" (we used Fuji
IGBTs for many years hence the term) everywhere. The rep was suitably
embarassed, and somewhat scared

Cheers
Terry

900V? Was the IGBT rated for that voltage?

Reminds me of those "fireproof" safes... sure, put a thermonuclear
device in one of dem dare fireproof safes, and we'll see who's
fireproof...

Terry Given · Mar 22, 2006

900V? Was the IGBT rated for that voltage?

yep, a little wee 300A 1200V half-bridge.

Reminds me of those "fireproof" safes... sure, put a thermonuclear
device in one of dem dare fireproof safes, and we'll see who's
fireproof...

many components fail short-circuit. for a little while. When dealing
with real power electronics (real = losses >> 1kW), a common failure
mode is "component no longer exists"

Cheers
Terry

Terry Given · Mar 22, 2006

Jim said:
Sounds like the time I burned an extension cord the whole length of a
lab bench... burned across the table just like a dynamite fuse ;-)

...Jim Thompson

Ye Gods Jim, how did you manage that?! Betcha scared the crap out of
passers by....

Cheers
Terry

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Suggested new Marketing Term for Datasheets

Suggested new Marketing Term for Datasheets

Genome

Joerg

John Larkin

Tim Shoppa

Spehro Pefhany

Terry Given

Rene Tschaggelar

martin griffith

Tim Williams

JeffM

Robert Baer

Tim Shoppa

Keith

Terry Given

Jim Thompson

Robert Obermayer

[email protected]

Terry Given

Terry Given

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