Post by thread:[OT:]A dead PIC

part 1 414 bytes content-type:text/plain; (decoded 7bit) I've fried my 16LF877. (Accidentally, +12v to Vdd, negative to Vss) These are the remains of the autopsy, enjoy. Regards, Dennis. PS: What is that kind of 'antenna' connected to the substrate? (the unconnected line in the middle) -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics part 2 6499 bytes content-type:image/jpeg; (decode)

Dennis Crawley wrote: > I've fried my 16LF877. (Accidentally, +12v to Vdd, negative to Vss) > These are the remains of the autopsy, enjoy. > > Regards, > Dennis. > > PS: What is that kind of 'antenna' connected to the substrate? (the > unconnected line in the middle) would you have a *much* bigger version ??? this is pretty small and virtually unuseable -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

You can download the bigger version from ftp://janso.serveftp.com Enjoy! Mauricio D. Jancic Janso Desarrollos - Microchip Consultant http://www.janso.com.ar spam_OUTinfoTakeThisOuTjanso.com.ar (54) - 11 - 4542 - 3519 Lugones 3238 "B" - C1430ECN Capital Federal Republica Argentina (54) - 11 - 4542 - 3519 MSN: .....jansodesarrollosKILLspam@spam@hotmail.com >>{Original Message removed}

> You can download the bigger version from > > ftp://janso.serveftp.com Does not accept anonymous login... Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

It should.... Mauricio D. Jancic Janso Desarrollos - Microchip Consultant http://www.janso.com.ar infoKILLspamjanso.com.ar (54) - 11 - 4542 - 3519 Lugones 3238 "B" - C1430ECN Capital Federal Republica Argentina (54) - 11 - 4542 - 3519 MSN: .....jansodesarrollosKILLspam.....hotmail.com >>{Original Message removed}

>It should.... Ah hah, it does now, it wouldn't earlier :)) -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

>>It should.... > >Ah hah, it does now, it wouldn't earlier :)) Well nearly. I can see the directory sometimes, but it seems to keep timing out when trying to connect. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

How did you produce the image? -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

I just talk to dennis and I can tell you that he took an xray picture of it with an odontologist (is that the correct word?) x-ray machine. Best regards Mauricio D. Jancic Janso Desarrollos - Microchip Consultant http://www.janso.com.ar EraseMEinfospam_OUTTakeThisOuTjanso.com.ar (54) - 11 - 4542 - 3519 Lugones 3238 "B" - C1430ECN Capital Federal Republica Argentina (54) - 11 - 4542 - 3519 MSN: jansodesarrollosspam_OUThotmail.com >>{Original Message removed}

>I just talk to dennis and I can tell you that he took an xray picture of >it with an odontologist (is that the correct word?) x-ray machine. I know that non-windowed, non-flash parts are the same as windowed parts, and could be erased if there was a way to get UV light into them. I have wondered if non-windowed parts could be erased with x-rays. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Mmmm lets ask dennis to try! Mauricio D. Jancic Janso Desarrollos - Microchip Consultant http://www.janso.com.ar @spam@infoKILLspamjanso.com.ar (54) - 11 - 4542 - 3519 Lugones 3238 "B" - C1430ECN Capital Federal Republica Argentina (54) - 11 - 4542 - 3519 MSN: KILLspamjansodesarrollosKILLspamhotmail.com >>{Original Message removed}

Dennis Crawley <RemoveMEPICLISTTakeThisOuTmitvma.mit.edu> wrote: > What is that kind of 'antenna' connected to the substrate? (the > unconnected line in the middle) Dennis: I don't think it serves any electrical function; I think it's just there to help support the die and improve mechanical reliability. -Andy === Andrew Warren -- spamBeGoneaiwspamBeGonecypress.com === Principal Design Engineer === Cypress Semiconductor Corporation === === Opinions expressed above do not === necessarily represent those of === Cypress Semiconductor Corporation -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

RE: > PS: What is that kind of 'antenna' connected to the substrate? (the > unconnected line in the middle) My guess is that they are connections for manufacture & test. John Ferrell 6241 Phillippi Rd Julian NC 27283 Phone: (336)685-9606 TakeThisOuTjohnferrellEraseMEspam_OUTearthlink.net Dixie Competition Products NSRCA 479 AMA 4190 W8CCW "My Competition is Not My Enemy" {Original Message removed}

On Wed, 19 Nov 2003 09:04:30 -0800, you wrote: >>I just talk to dennis and I can tell you that he took an xray picture of >>it with an odontologist (is that the correct word?) x-ray machine. > >I know that non-windowed, non-flash parts are the same as windowed >parts, and could be erased if there was a way to get UV light into >them. I have wondered if non-windowed parts could be erased with >x-rays. I have seen this discussed a lot, and the conclusion seemd to be that x-rays strong enough to cause erasure would also cause damage. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Possibly extra heatsinking ? ----- Original Message ----- From: "John Ferrell" > > My guess is that they are connections for manufacture & test. > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> RE: > > PS: What is that kind of 'antenna' connected to the substrate? (the > > unconnected line in the middle) > > My guess is that they are connections for manufacture & test. Agreed. My further guess would be it connects to the "scan chain" structure added to most digital designs. TTYL ---------------------------------- Herbert's PIC Stuff: http://repatch.dyndns.org:8383/pic_stuff/ -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Andrew Warren <RemoveMEaiwTakeThisOuTCYPRESS.COM> wrote: > Dennis Crawley <PICLISTEraseME.....mitvma.mit.edu> wrote: > > What is that kind of 'antenna' connected to the substrate? (the > > unconnected line in the middle) > > I don't think it serves any electrical function; I think it's just > there to help support the die and improve mechanical reliability. More to the point, it's the *only* support for the die until the plastic package has been molded around the lead frame following the wire bonding. I have to say, I'm a bit surprised that a "Principal Design Engineer" at a major chip manufacturer didn't have a definitive answer for this! -- Dave Tweed -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

On Wed, Nov 19, 2003 at 07:05:56PM -0800, Dave Tweed wrote: > I have to say, I'm a bit surprised that a "Principal Design Engineer" at > a major chip manufacturer didn't have a definitive answer for this! Probably outside his engineering scope and he couldn't justify using others in the organisation to derive an (unpaid) answer. ;-) I get this all the time. -- James Cameron EraseMEquozlus.netrek.org http://quozl.netrek.org/ -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Dave Tweed <RemoveMEPICLISTEraseMEEraseMEmitvma.mit.edu> wrote: > I have to say, I'm a bit surprised that a "Principal Design > Engineer" at a major chip manufacturer didn't have a definitive > answer for this! Yeah, it's pretty sad. It's a good thing that the talented Packaging Engineers in our company don't do any microcontroller architecture; they'd probably be almost as bad at recognizing the obvious in my field as I am in theirs. -Andy === Andrew Warren -- RemoveMEaiwspam_OUTKILLspamcypress.com === Principal Design Engineer === Cypress Semiconductor Corporation === === Opinions expressed above do not === necessarily represent those of === Cypress Semiconductor Corporation -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.