Identify this chip

ScratchMonkey · 07-01-2008, 02:03 AM

Here's a picture of a chip from an electric train's power output board. (Not a model. An actual light rail train.) Can anyone identify the chip? (The documentation has long since been lost.)

**Bamboo** · 07-01-2008, 02:23 AM

Hahahaha

I thought this was going to be a joke thread, and the picture was going to be like this

As for the chip, I have no idea.

**DrakenViator** · 07-01-2008, 02:50 AM

Well it's a 307AAP3. What the heck that means I have yet to figure out...

~ Draken

Buckets · 07-01-2008, 02:54 AM

There is a shop in town that would probably be able to figure it out if they could look a it in person. The place is called Circuit Specialists. They knew which capacitors I needed to replace the ones I accidentally broke off of my video card once.

MagnaCentipede · 07-01-2008, 03:22 AM

Google knows the IC exists (and knows we're talking about it) but I didn't see any obvious data sheet links. Lots of Chinese sites seem to talk about it.

**DrakenViator** · 07-01-2008, 03:27 AM

Quote:

Originally Posted by MagnaCentipede

Google knows the IC exists (and knows we're talking about it) but I didn't see any obvious data sheet links. Lots of Chinese sites seem to talk about it.

Same issue I've spent almost a half hour looking a LOT of places want to sell these by the thousands, but don't tell what they would be good for...

~ Draken

ScratchMonkey · 07-01-2008, 04:26 AM

The closest I found was a 14 pin IC with an analog switch, but it was using too many pins to fit in this 6 pin SOIC package.

The company that made the train has gone through several acquisitions, each time losing engineering knowledge, and somewhere along the way all the documentation was lost. Alas, it seems corporate acquisitions are highly entropic. (The one I went through bled engineers pretty bad, including me.)

This doesn't bode well for that maglev train being promulgated in this Sandbox thread:

http://www.tacticalgamer.com/sandbox...eed-train.html

ScratchMonkey · 07-01-2008, 04:45 AM

Found this resource:

http://howto.wikia.com/wiki/Howto_id..._chip_packages

Has logos that I'm looking through now.

ScratchMonkey · 07-01-2008, 05:08 AM

More digging suggests that the QTC refers to Quaestus Corporation, which Fairchild acquired. This is probably an old optocoupler.

http://www.fairchildsemi.com/products/opto/index.html

**Apophis** · 07-01-2008, 07:32 AM

I see places to buy the 307AAP3 online, but no real information on what it actually is.

**draeh** · 07-01-2008, 09:27 AM

QTC made a line of optocouplers. QTC was bought up by Fairchild. The part in question is obsolete and no longer listed on Fairchild's website. I have queried them and their local reps to see if we can dig up the datasheet.

**draeh** · 07-01-2008, 02:30 PM

Next step in the story.

Quote:

Originally Posted by From Fairchild

Subject
QTC307AAP3

Discussion Thread
Response (Kevin Emmons) 07/01/2008 12:13 PM
Dear Glenn,
Good afternoon. Fairchild sold that part of our LED business to Ever Light Co., a few years back. You will have to contact them for information regarding that device. The companies web site is: http://www.everlight.com/

Thank you,
Kevin
Fairchild Customer Support

Now I have a call into the Everlight people.

**PanzerHans** · 07-01-2008, 05:48 PM

Is this relevant?
http://groups.google.com.ag/group/sc...cd16e422fcd575

Edit: Doh, your thread I believe.....

ScratchMonkey · 07-01-2008, 06:09 PM

Thanks, much, draeh!

ScratchMonkey · 07-01-2008, 06:14 PM

Yep, PanzerHans, that's my thread.

07-01-2008, 02:03 AM	#1 (permalink)
ScratchMonkey Join Date: Aug 2005 Location: San Pablo, California Posts: 4,565	Identify this chip Here's a picture of a chip from an electric train's power output board. (Not a model. An actual light rail train.) Can anyone identify the chip? (The documentation has long since been lost.) __________________

07-01-2008, 02:23 AM	#2 (permalink)
Bamboo Join Date: Nov 2006 Location: On the beach north of Jacksonville, NC Posts: 3,399	Re: Identify this chip Hahahaha I thought this was going to be a joke thread, and the picture was going to be like this As for the chip, I have no idea. __________________ LINKS 10th Tactical Guard Server Rules and SOP * Kicked? Banned? READ THIS FIRST!* Contact an Admin * Nominate your teammates for a ribbon Stoop and you'll be stepped on; stand tall and you'll be shot at. -Carlos A. Urbizo-

07-01-2008, 02:50 AM	#3 (permalink)
DrakenViator Join Date: Apr 2008 Location: Grand Rapids, MI Posts: 800	Re: Identify this chip Well it's a 307AAP3. What the heck that means I have yet to figure out... ~ Draken __________________ \|TG-55\| Infantry Division "When asked how I knew some small unit tactics... I simply stated "Video Games". They thought I was joking..." ~ Dirtboy

07-01-2008, 02:54 AM	#4 (permalink)
Buckets Join Date: Feb 2006 Location: Tucson, AZ Age: 27 Posts: 544	Re: Identify this chip There is a shop in town that would probably be able to figure it out if they could look a it in person. The place is called Circuit Specialists. They knew which capacitors I needed to replace the ones I accidentally broke off of my video card once. __________________ The artist formerly known as "pecker"

07-01-2008, 03:22 AM	#5 (permalink)
MagnaCentipede Join Date: May 2007 Posts: 1,953	Re: Identify this chip Google knows the IC exists (and knows we're talking about it) but I didn't see any obvious data sheet links. Lots of Chinese sites seem to talk about it. __________________

07-01-2008, 04:26 AM	#7 (permalink)
ScratchMonkey Join Date: Aug 2005 Location: San Pablo, California Posts: 4,565	Re: Identify this chip The closest I found was a 14 pin IC with an analog switch, but it was using too many pins to fit in this 6 pin SOIC package. The company that made the train has gone through several acquisitions, each time losing engineering knowledge, and somewhere along the way all the documentation was lost. Alas, it seems corporate acquisitions are highly entropic. (The one I went through bled engineers pretty bad, including me.) This doesn't bode well for that maglev train being promulgated in this Sandbox thread: http://www.tacticalgamer.com/sandbox...eed-train.html __________________

07-01-2008, 04:45 AM	#8 (permalink)
ScratchMonkey Join Date: Aug 2005 Location: San Pablo, California Posts: 4,565	Re: Identify this chip Found this resource: http://howto.wikia.com/wiki/Howto_id..._chip_packages Has logos that I'm looking through now. __________________

07-01-2008, 05:08 AM	#9 (permalink)
ScratchMonkey Join Date: Aug 2005 Location: San Pablo, California Posts: 4,565	Re: Identify this chip More digging suggests that the QTC refers to Quaestus Corporation, which Fairchild acquired. This is probably an old optocoupler. http://www.fairchildsemi.com/products/opto/index.html __________________

07-01-2008, 07:32 AM	#10 (permalink)
Apophis Join Date: Oct 2001 Location: Rhode Island, USA Age: 36 Posts: 8,991	Re: Identify this chip I see places to buy the 307AAP3 online, but no real information on what it actually is. __________________ Diplomacy is the art of saying "good doggie" while looking for a bigger stick.

07-01-2008, 09:27 AM	#11 (permalink)
draeh Join Date: Apr 2007 Location: Austintown, Ohio Age: 36 Posts: 2,728	Re: Identify this chip QTC made a line of optocouplers. QTC was bought up by Fairchild. The part in question is obsolete and no longer listed on Fairchild's website. I have queried them and their local reps to see if we can dig up the datasheet. __________________ Dirtboy's 2142 Evolution - Improving Situational Awareness! My Screenies - My Webpage - Xfire Submit a Nomination! - Nomination Guidelines - Awards List

07-01-2008, 05:48 PM	#13 (permalink)
PanzerHans Join Date: Aug 2005 Location: By the PC Age: 35 Posts: 2,262	Re: Identify this chip Is this relevant? http://groups.google.com.ag/group/sc...cd16e422fcd575 Edit: Doh, your thread I believe..... __________________ -- VI VI VI - the number of the beast

07-01-2008, 06:09 PM	#14 (permalink)
ScratchMonkey Join Date: Aug 2005 Location: San Pablo, California Posts: 4,565	Re: Identify this chip Thanks, much, draeh! __________________

07-01-2008, 06:14 PM	#15 (permalink)
ScratchMonkey Join Date: Aug 2005 Location: San Pablo, California Posts: 4,565	Re: Identify this chip Yep, PanzerHans, that's my thread. __________________

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