Suggested new Marketing Term for Datasheets

[Genome]

Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

DNA

 

[Joerg]

Hello Genome,

Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

Or 'Pyrotechnical Data'.

Regards, Joerg

 

[John Larkin]

Instead of

'Absolute Maximum Ratings'

Data sheets should be specified with

'Use Once Ratings'

DNA

Fuses. Krytrons. Detonators. Anything else?

John

 

[Tim Shoppa]

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]

Fuses. Krytrons. Detonators. Anything else?

John

Thermal cutoffs.


Best regards,
Spehro Pefhany

 

[Terry Given]

Thermal cutoffs.


Best regards,
Spehro Pefhany

spring washers

Cheers
Terry

 

[Rene Tschaggelar]

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]

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]

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]

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]

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]

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]

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]

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]

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]

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

 

[[email protected]]

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]

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]

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