White IC package color?

DaveC · Jul 6, 2004

The CNY-17 optocoupler package is available in white as an option. I presume
this is not semiconductor designer chic.

What is the purpose for offering this in both white and black packages?

Thanks,
--
DaveC
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Rune Christensen · Jul 6, 2004

Hello Dave

Maybe the white one is a ceramic package.

It's possible that it has something to do with ambient temperature.

Cheers
Rune

"DaveC" <me@privacy.net> skrev i en meddelelse
news:0001HW.BD100C8300802D03F02845B0@news.individual.net...

The CNY-17 optocoupler package is available in white as an option. I
presume
this is not semiconductor designer chic.

What is the purpose for offering this in both white and black packages?

Thanks,
--
DaveC
me@privacy.net
This is an invalid return address
Please reply in the news group

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legg · Jul 6, 2004

On Tue, 6 Jul 2004 08:00:03 -0700, DaveC <me@privacy.net> wrote:

The CNY-17 optocoupler package is available in white as an option. I presume
this is not semiconductor designer chic.

What is the purpose for offering this in both white and black packages?

Different mfrs use different body materials.

One mfr will not likely offer both, but distributors offering more
than one source for the part may do so. There is no practical
difference.

RL

Clint Sharp · Jul 6, 2004

In message <0001HW.BD100C8300802D03F02845B0@news.individual.net>, DaveC
<me@privacy.net> writes

The CNY-17 optocoupler package is available in white as an option. I presume
this is not semiconductor designer chic.

What is the purpose for offering this in both white and black packages?
Think you may find the white package has a higher certified breakdown

voltage.

Thanks,

--
Clint Sharp

Joerg · Jul 6, 2004

Hi Dave,

A black body heats up more under light exposure than a white one does. I
don't know whether that was the motivation behind it but it could be.

Do they also come in pearl white

?

Regards, Joerg

http://www.analogconsultants.com

John Larkin · Jul 6, 2004

On Tue, 06 Jul 2004 18:20:24 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:

Hi Dave,

A black body heats up more under light exposure than a white one does. I
don't know whether that was the motivation behind it but it could be.

Do they also come in pearl white ?

Regards, Joerg

http://www.analogconsultants.com

Why are there no blue ICs? Or red, or orange, or green?

Purple would be nice.

Some of the old 486 chips were sort of a blue-grey ceramic. They make
excellent X-acto blade sharpeners.

John

Joerg · Jul 6, 2004

Hi John,

Why are there no blue ICs? Or red, or orange, or green?

Purple would be nice.

They do or at least they used to. When I was a kid I built lots of stuff

with TTL and there were some ICs that came in purple, others in blue.
Then there were quad opamps that came in Hunter green. That's not a
joke. The green ones looked the best.

Some of the old 486 chips were sort of a blue-grey ceramic. They make
excellent X-acto blade sharpeners.

Just make sure there is no beryllium in them. Its oxide can lop some

years off of your lifetime and that of those around you.

Regards, Joerg

http://www.analogconsultants.com

John Larkin · Jul 6, 2004

On Tue, 06 Jul 2004 18:48:44 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:

Hi John,

Why are there no blue ICs? Or red, or orange, or green?

Purple would be nice.

They do or at least they used to. When I was a kid I built lots of stuff
with TTL and there were some ICs that came in purple, others in blue.
Then there were quad opamps that came in Hunter green. That's not a
joke. The green ones looked the best.

Some of the old 486 chips were sort of a blue-grey ceramic. They make
excellent X-acto blade sharpeners.

Just make sure there is no beryllium in them. Its oxide can lop some
years off of your lifetime and that of those around you.

Good point. I was tempted to buy a bunch of custom-sliced BeO things a
while back; it has the best thermal conductivity/dielectric constant
ratio of anything except diamond. People will still cheerfully slice
the stuff to your dims and sell it to you. Chickened out, what with
the hazard to everybody, and used AlN, which is almost as good.

I did soak a slice of AlN halfway in a cup of water for a couple of
days, having read that moisture can decompose it into AlO2 and
ammonia, or something. Didn't seem to affect it.

John

Jim Thompson · Jul 6, 2004

On Tue, 06 Jul 2004 12:11:44 -0700, John Larkin
<jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

On Tue, 06 Jul 2004 18:48:44 GMT, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Hi John,

Why are there no blue ICs? Or red, or orange, or green?

Purple would be nice.

They do or at least they used to. When I was a kid I built lots of stuff
with TTL and there were some ICs that came in purple, others in blue.
Then there were quad opamps that came in Hunter green. That's not a
joke. The green ones looked the best.

Some of the old 486 chips were sort of a blue-grey ceramic. They make
excellent X-acto blade sharpeners.

Just make sure there is no beryllium in them. Its oxide can lop some
years off of your lifetime and that of those around you.

Good point. I was tempted to buy a bunch of custom-sliced BeO things a
while back; it has the best thermal conductivity/dielectric constant
ratio of anything except diamond. People will still cheerfully slice
the stuff to your dims and sell it to you. Chickened out, what with
the hazard to everybody, and used AlN, which is almost as good.

I did soak a slice of AlN halfway in a cup of water for a couple of
days, having read that moisture can decompose it into AlO2 and
ammonia, or something. Didn't seem to affect it.

John

480)460-2350 | |
| E-mail Address at Website Fax

Joerg · Jul 6, 2004

Hi Jim,

Only inhaling the *dust* of BeO is harmful. ...

Yes, Jim. And that's exactly what I am always concerned about. We all

know the dangers but others who happen upon it may not realize the
danger when dropping it. When it shatters and then someone just goes out
and uses a broom to clean up the mess this could cause longer term grief.

... You can eat it to your heart's content. At Dickson we sawed it under water.

Way to go, but I still wouldn't eat it. I am certain that someone made

sure the water was properly detoxed so it doesn't have a chance to
puddle somewhere, dry out and the dust comes back to life.

Regards, Joerg

http://www.analogconsultants.com

Jim Thompson · Jul 6, 2004

On Tue, 06 Jul 2004 19:37:25 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:

Hi Jim,

Only inhaling the *dust* of BeO is harmful. ...

Yes, Jim. And that's exactly what I am always concerned about. We all
know the dangers but others who happen upon it may not realize the
danger when dropping it. When it shatters and then someone just goes out
and uses a broom to clean up the mess this could cause longer term grief.

... You can eat it to your heart's content. At Dickson we sawed it under water.

Way to go, but I still wouldn't eat it. I am certain that someone made
sure the water was properly detoxed so it doesn't have a chance to
puddle somewhere, dry out and the dust comes back to life.

Regards, Joerg

http://www.analogconsultants.com

480)460-2350 | |
| E-mail Address at Website Fax

Guy Macon · Jul 6, 2004

John Larkin <jjlarkin@highSNIPlandTHIStechPLEASEnology.com> says...

Why are there no blue ICs? Or red, or orange, or green?
Purple would be nice.

Because black ICs dissapate heat better and run cooler.

Given the trend to colorful motherboards, I expect to see
PC chip sets in colors sometime in the future.

--
Guy Macon, Electronics Engineer & Project Manager for hire.
Remember Doc Brown from the _Back to the Future_ movies? Do you
have an "impossible" engineering project that only someone like
Doc Brown can solve? My resume is at http://www.guymacon.com/

Spehro Pefhany · Jul 6, 2004

On Tue, 6 Jul 2004 08:00:03 -0700, the renowned DaveC <me@privacy.net>
wrote:

The CNY-17 optocoupler package is available in white as an option. I presume
this is not semiconductor designer chic.

What is the purpose for offering this in both white and black packages?

Thanks,

Look at the data sheet: http://www.fairchildsemi.com/ds/CN/CNY17-3.pdf

They have different specs in a number of areas- even the recommended
SMT pad layout is different.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

John Larkin · Jul 6, 2004

On Tue, 06 Jul 2004 12:50:12 -0700, Jim Thompson
<thegreatone@example.com> wrote:

On Tue, 06 Jul 2004 19:37:25 GMT, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Hi Jim,

Only inhaling the *dust* of BeO is harmful. ...

Yes, Jim. And that's exactly what I am always concerned about. We all
know the dangers but others who happen upon it may not realize the
danger when dropping it. When it shatters and then someone just goes out
and uses a broom to clean up the mess this could cause longer term grief.

... You can eat it to your heart's content. At Dickson we sawed it under water.

Way to go, but I still wouldn't eat it. I am certain that someone made
sure the water was properly detoxed so it doesn't have a chance to
puddle somewhere, dry out and the dust comes back to life.

Regards, Joerg

http://www.analogconsultants.com

It was a muddy looking combination of water, detergent and oil. I
don't remember how we disposed of it; we dumped the TCE in a dry well
;-)

...Jim Thompson

I used to work for this place in New Orleans. I designed a couple
hundred million dollars worth of stuff for them before they fired me
for insubordination. They had their own PCB shop, and disposed of all
the used chemicals through a pipe that went through the wall. That's
as far as it went.

John

John Popelish · Jul 6, 2004

Spehro Pefhany wrote:

Look at the data sheet: http://www.fairchildsemi.com/ds/CN/CNY17-3.pdf

They have different specs in a number of areas- even the recommended
SMT pad layout is different.

Woah! Actual information.

Lower capacitance, higher breakdown voltage, slightly lower current
transfer ration (and higher linear resistance versus LED current.
Looks like it has a longer light pipe between emitter and detector.

--
John Popelish

DaveC · Jul 6, 2004

I found this on the data sheet for a Fairchild CNY-17 optoisolator IC that is
offered in both colors. Here is a screen dump:

http://home.covad.net/~tmcenter/peninsula/black.white.tiff

Apparently there are different specs for the different color packages.

Any idea why?
--
DaveC
me@privacy.net
This is an invalid return address
Please reply in the news group

K Williams · Jul 7, 2004

Sillinessson wrote:

On Tue, 06 Jul 2004 12:11:44 -0700, John Larkin
jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

On Tue, 06 Jul 2004 18:48:44 GMT, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Hi John,

Why are there no blue ICs? Or red, or orange, or green?

Purple would be nice.

They do or at least they used to. When I was a kid I built lots of
stuff with TTL and there were some ICs that came in purple, others in
blue. Then there were quad opamps that came in Hunter green. That's
not a joke. The green ones looked the best.

Some of the old 486 chips were sort of a blue-grey ceramic. They
make excellent X-acto blade sharpeners.

Just make sure there is no beryllium in them. Its oxide can lop some
years off of your lifetime and that of those around you.

Good point. I was tempted to buy a bunch of custom-sliced BeO things a
while back; it has the best thermal conductivity/dielectric constant
ratio of anything except diamond. People will still cheerfully slice
the stuff to your dims and sell it to you. Chickened out, what with
the hazard to everybody, and used AlN, which is almost as good.

I did soak a slice of AlN halfway in a cup of water for a couple of
days, having read that moisture can decompose it into AlO2 and
ammonia, or something. Didn't seem to affect it.

John

Only inhaling the *dust* of BeO is harmful. You can eat it to your
heart's content. At Dickson we sawed it under water.

Our chemical safety "experts" found out that HP pulse generators had
chips with BeO substrates some years ago (well the manuals and chassis
had Be warnings on 'em). The CS dweebs just about got HP to bend over
for a quickie, when HP decided to modify the "danger" to a warning for
disposal. Seriously. they were about to rip every pulse generator out
of every lab and test set and ship 'em back with a bill attached.

Silliness really, since the BeO was well encapsulated, and we weren't in
the habit of snorting anything other than coffee, on a bad day.

--
Keith

Kevin G. Rhoads · Jul 7, 2004

don't remember how we disposed of it; we dumped the TCE in a dry well
;-)

Y'all been around long enough to know better than to post such stuff, Jim.
Somebody of the gov't buttinskyish persuasion may read it, not see the
smiley, and go ballistic.

THen you is guilty until proven innocent *and* they's no way you can
*prove* yourself innocent.

;-) (OK, that ";-)" makes it all bettter..., right? [;-)] )

White IC package color?

DaveC

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