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fRaSsL
Joined: 31 Mar 2003
Posts: 1570
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 Posted: Thu Aug 10, 2006 11:19 am Post subject: White ceramics chip |
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Hi!
I got this nice little chip by a friend from his box if East German standards chips. See the label. U**** is typical for only two fabs! Telefunken and all East Germans fabs. But I doubt it's East German. 1st I have no datasheet... I nearly have datasheets to all EG chips. 2nd is the unusual housing and pin configuration. MME / ZMD / AMD never made housings like this...
Any ideas?
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Frank. |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Thu Aug 10, 2006 1:43 pm Post subject: |
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| I have never seen legs terminated to the ceramic body on the bottom like that. |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Thu Aug 10, 2006 6:59 pm Post subject: |
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That's actually not all that uncommon; the MK6021 on the left has its pins attached underneath:
I've seen a few dozen chips like those over the years... e.g., a couple early Fairchild ICs - 3501 ROM, 3750 D/A converter, 3800 bit-slice CPU - all use that same kind of cerdip package. (In fact, their lids are on the bottom too.)
- CMW |
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fRaSsL
Joined: 31 Mar 2003
Posts: 1570
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| Posted: Thu Aug 10, 2006 11:59 pm Post subject: |
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So we can say this is an old chip, hmm?
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Frank. |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri Aug 11, 2006 8:50 am Post subject: |
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nice old chip  |
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