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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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 Posted: Fri Mar 03, 2006 3:35 am Post subject: Earliest EPROM you have. |
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For me it is this nice National 5203Q tis a 2kbit EPROM
Gold plate on top.
the window is thicker then the chip itself.
made week 19 of 1973
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Fri Mar 03, 2006 5:52 am Post subject: |
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MM5203Q, white ceramic/gold. The window isn't as thick as on yours. Date code 525 - 1975 week 25.
Next is an Intel D8742 microcontroller with 2k eprom, 1979 week 12.
Neither is very old, but they are nice 
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri Mar 03, 2006 5:57 am Post subject: |
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dunno.. they are all over the place in various boxes.  |
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morkork
Joined: 25 Feb 2003
Posts: 447
Location: Nuremberg, Germany
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| Posted: Fri Mar 03, 2006 6:29 am Post subject: |
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Fujitsu MBM2716, datecode 7950
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Riviera
Joined: 03 Feb 2003
Posts: 159
Location: Sweden
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| Posted: Fri Mar 03, 2006 5:11 pm Post subject: |
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I can not tell how old my early Eprom's are as they have no datecode and Intel didn't started to put datecodes until 1975.
My earliest is a 1702 non C-prefix and non A-suffix with no datecode and they started making these in 1972.
Intel was the first company to make an Eprom in january 1971.
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CPUShack
Joined: 16 Jun 2003
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Riviera
Joined: 03 Feb 2003
Posts: 159
Location: Sweden
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| Posted: Fri Mar 03, 2006 5:53 pm Post subject: |
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Ohh... it's a beauty!
But mine has an earlier stepping. 
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chipcollector
Joined: 28 Sep 2004
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Location: New England
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CPUShack
Joined: 16 Jun 2003
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Fri Mar 03, 2006 6:18 pm Post subject: |
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Beautiful! Chips like those are the reason why I bought all those anti-static boxes last week I'll catch up with you guys when I sell my neighbours house
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wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
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| Posted: Fri Mar 31, 2006 9:25 am Post subject: |
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| Riviera wrote: | I can not tell how old my early Eprom's are as they have no datecode and Intel didn't started to put datecodes until 1975.
My earliest is a 1702 non C-prefix and non A-suffix with no datecode and they started making these in 1972.
Intel was the first company to make an Eprom in january 1971. |
I have a lot of Intel chips with earlier datecode than 75.
I am sure they started before '73. |
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zozo001
Joined: 02 Sep 2006
Posts: 3
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| Posted: Tue Feb 13, 2007 10:37 am Post subject: |
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here are 3 older one  |
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wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
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| Posted: Tue Feb 13, 2007 10:58 am Post subject: |
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Wow!
I love your 1701!!! |
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zozo001
Joined: 02 Sep 2006
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| Posted: Tue Feb 13, 2007 11:46 am Post subject: |
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| me too |
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CPUShack
Joined: 16 Jun 2003
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