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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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Elar
Joined: 16 Jul 2003
Posts: 641
Location: Tallinn, Estonia
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 Posted: Sun Aug 22, 2010 2:19 am Post subject: |
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| 50ns access time, that's pretty fast for EPROM. |
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CPUShack
Joined: 16 Jun 2003
Posts: 12841
Location: State of Jefferson, USA
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| Posted: Sun Aug 22, 2010 2:26 am Post subject: |
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yah wahts interesting is that it has a die BIGGER then the 100ns access time one I have (that was made a couple years earlier)
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magictom
Joined: 14 May 2009
Posts: 1531
Location: Hawaii
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| Posted: Sun Aug 22, 2010 2:33 am Post subject: |
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| I'm wondering why EPROM capacity wasn't able to keep up with other memories ... |
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JAC
Joined: 24 Jul 2005
Posts: 3430
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| Posted: Sun Aug 22, 2010 8:13 am Post subject: |
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Nice thread.
Magictom, I dont think it is a case of not keeping up, it was simply kicked in the ass by better technology, i.e. flash. I havent looked much into it, but I just assumed newer fabs and improved chip manufacture made earlier eprom manufacture obsolete. |
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JAC
Joined: 24 Jul 2005
Posts: 3430
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| Posted: Sun Aug 22, 2010 8:28 am Post subject: |
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Here are some nice ones from my stash...
4M
1M
Loads more unscanned. ooops. |
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Qwerty
Joined: 20 May 2005
Posts: 2115
Location: Germany
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| Posted: Sun Aug 22, 2010 10:03 am Post subject: |
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Thee 4Mb chip is wonderful  |
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CPUShack
Joined: 16 Jun 2003
Posts: 12841
Location: State of Jefferson, USA
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| Posted: Fri Oct 22, 2010 12:09 am Post subject: |
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not the biggest die but as a % of the chip size its rather nice.
Atmel AT27C040 4Mbit EPROM
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***I Aim to Misbehave.***
Some where out there . There's a bullet with your name on it .....
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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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D.8080
Joined: 03 Apr 2006
Posts: 1235
Location: Italy
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| Posted: Thu Nov 11, 2010 12:43 pm Post subject: |
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At first I thought I was high on something...
Nice thread and nice pics. I understand why there's EPROM collecting, really nice chips. |
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CPUShack
Joined: 16 Jun 2003
Posts: 12841
Location: State of Jefferson, USA
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| Posted: Fri Dec 03, 2010 2:12 am Post subject: |
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And yet more goodness, these really make EPROMs worth the time.
They are simply beautiful
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Visit The CPU Shack of microprocessor history and information. |
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