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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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 Posted: Fri Aug 27, 2010 2:02 am Post subject: CAN anyone ID this old chips??? |
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CAN anyone ID this old chips????
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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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kosmokrator
Joined: 03 Jul 2008
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Location: Athens-GR
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| Posted: Fri Aug 27, 2010 2:45 am Post subject: |
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| thnx john... |
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magictom
Joined: 14 May 2009
Posts: 2281
Location: Hawaii
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| Posted: Fri Aug 27, 2010 2:54 am Post subject: |
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| Hmm the logo of the last two "= a" looks like Amelco. They were an early IC manufacturer, but I thought Teledyne bought them out in the 60s. Does anybody know? |
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kosmokrator
Joined: 03 Jul 2008
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Location: Athens-GR
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| Posted: Fri Aug 27, 2010 3:07 am Post subject: |
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i think the "fdy" is the manufacturer....
its really old chips with gold legs....
im curius what may is.... |
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magictom
Joined: 14 May 2009
Posts: 2281
Location: Hawaii
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| Posted: Fri Aug 27, 2010 3:18 am Post subject: |
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| Look at the attached 321CJ IC from Amelco (quad 2-input OR gate, DTL) from 1969 - same logo, and even the gray plastic + gold pins look similar. No idea what yours is, though ... |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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kosmokrator
Joined: 03 Jul 2008
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Location: Athens-GR
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| Posted: Fri Aug 27, 2010 3:26 am Post subject: |
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hhmmm...thnx Neon_WA 
looks like its from some old calculator....not same part number....but who know...
also the manuf ...is not amelco.... is Electronic Arrays the stand for the "a"...... |
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Neon_WA
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magictom
Joined: 14 May 2009
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magictom
Joined: 14 May 2009
Posts: 2281
Location: Hawaii
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| Posted: Sat Aug 28, 2010 12:41 am Post subject: |
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I finally figured out my confusion about the Amelco logo. Looking at the 2 logos carefully, the Amelco logo has a substantially larger "body" in the "a" than the EA "a". I actually have an Amelco IC from 1966 with the large-body "a" logo, at which time EA didn't exist yet.
So apparently both Amelco and EA used a plain "a" as a logo, although with a slightly different font. How creative they were! |
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Sat Aug 28, 2010 10:05 am Post subject: |
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Thnx Magic Tom.... but i think is coincidence the part number 5057 ....
thnx all for your help brothers |
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magictom
Joined: 14 May 2009
Posts: 2281
Location: Hawaii
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| Posted: Sat Aug 28, 2010 4:40 pm Post subject: |
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| kosmokrator wrote: | Thnx Magic Tom.... but i think is coincidence the part number 5057 ....
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I agree, it's just an educated guess. The 40-pin DIP package isn't all that common, but without documentation we won't know for sure. |
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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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| Posted: Tue Apr 26, 2011 4:56 pm Post subject: |
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| magictom wrote: | I finally figured out my confusion about the Amelco logo. Looking at the 2 logos carefully, the Amelco logo has a substantially larger "body" in the "a" than the EA "a". I actually have an Amelco IC from 1966 with the large-body "a" logo, at which time EA didn't exist yet.
So apparently both Amelco and EA used a plain "a" as a logo, although with a slightly different font. How creative they were! |
Here's another version of the Amelco Logo.
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Tue Apr 26, 2011 7:08 pm Post subject: |
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| tlccomp wrote: |
Here's another version of the Amelco Logo. |
Completely different logo on the bottom one.
Did they use two logos? 
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