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Author Topic: Unknown Chips  (Read 1837 times)
TANAKASAN
Member

Posts: 933




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« on: August 07, 2012, 07:22:37 AM »

I have just found two unknown chips in my collection, they are marked:

12TI
JER

To eliminate any confusion depending on what font you're using the first line is one-two-tango-india. They are eight pin devices.

Any idea what I have?

Tanakasan
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K8AXW
Member

Posts: 3958




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« Reply #1 on: August 07, 2012, 09:34:54 AM »

Personally, I think you have trash can fodder.   Wink

Whenever I go through my chip drawers looking for something specific and encounter these unidentifiable chips I pitch 'em.  With ICs so cheap these days there (again, my opinion) isn't any reason to waste time trying to figure what what they are.

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KD0REQ
Member

Posts: 1006




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« Reply #2 on: August 07, 2012, 09:45:02 AM »

assume you have already tried the Google/Bing/Opera route with these, right?

if NTE can't match 'em, and a web search finds nothing, bin 'em.

or hook them up to some HV and see what color of magic smoke was inside.  that might be a clue.
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KA4POL
Member

Posts: 2083




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« Reply #3 on: August 07, 2012, 10:23:47 AM »

Funny guessing game without a minimum information.
Answer: You got two unknown chips marked:12TI and JER   Grin Grin
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WB6BYU
Member

Posts: 13457




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« Reply #4 on: August 07, 2012, 11:33:21 AM »

Did Texas Instruments have parts assembled on Jersey?

When in doubt, I assume an 8-pin chip is probably a dual op amp (or perhaps single if it
is in a metal can) and test it accordingly, since the pinout is pretty standard.  If it works,
put it in the corresponding parts bin.  If not, then you know one thing it isn't.


I could sent you some of my unidentifiable chips if you want to spend time experimenting
with them...
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G3RZP
Member

Posts: 4830




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« Reply #5 on: August 07, 2012, 10:41:10 PM »

TI didn't assemble in Jersey, CI (as opposed to NJ).
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