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Old 14th November 2011, 07:57 PM   #1
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Default Obsolete parts

I am having some problems obtaining parts for projects mainly i think because i am building from schematics that are years old, typically 1980's, does anyone have any good suppliers for these kind of parts, mainly I.C's?

LM3900
CA3080
LM3403

When i do find a stockist they usually want a minimum order such as $75 which makes it an expensive investment, else they have a minimum order of 100 or 500, obviously way too many for my needs.

Also i need a supplier that would stock all the I.C's i listed above so i don't have to pay postage for 3 seperate orders from various companies, any help would be appreciated.

How do you guys go on about obtaining obsolete parts?

Neil.
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Old 14th November 2011, 11:42 PM   #2
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LM3900: TI seems to be still manufacturing this IC. Digikey reports stock on hand.

CA3080: I think the only inexpensive OTA still in production is the National LM13700. It's a dual, so you'll have to redo the PWB, or rig some kind of adapter. Digikey reports stock on-hand.

LM3403: I'm not sure what advantage this part really has over an LM324 . . . and a TL074 should outperform it in most applications.

Dale
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Old 15th November 2011, 12:27 AM   #3
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Your local Peavey sound equipment dealer might have CA3080, they call it 70413080. don't be surprised if it comes in 13080 from Harris semiconductor.
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Old 15th November 2011, 02:50 AM   #4
Enzo is offline Enzo  United States
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And at Mouser:
15,000 LM3900 in stock at 50 cents each. 33 cents each if you buy 25 or more.
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Old 15th November 2011, 03:02 AM   #5
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jameco sells CA3080's
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Old 15th November 2011, 10:47 AM   #6
DF96 is offline DF96  England
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In the UK Cricklewood Electronics are good for obsolete chips.
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Old 15th November 2011, 02:27 PM   #7
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Thanks guys, i'll go take a look.

Neil.
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