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liudr
Joined: 15 Nov 2011
Posts: 58
Location: USA
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 Posted: Wed Nov 16, 2011 11:48 pm Post subject: Help with this chip mc68hc705b5b |
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mc68hc705b5b
I got this from a recent trade. Please see picture. Not marking in the back but it says prototype. Googled and found the chip to be "8-bit single chip microcomputer". Does this chip have any collectible value or significance in any computing platform at all? It's pretty new if I read the date code correctly. It's mint too. |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Thu Nov 17, 2011 12:00 am Post subject: |
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week 28 1992
Motorola do a lot of special masks in their MCU series.. so this would be initial test production.
First run final production would normally be marked Sample like here
http://www.cpu-world.com/forum/viewtopic.php?t=17019
MCUs are only collected by a few, but being marked Prototype it has wider appeal
So bottom line.. yes it is a nice chip & collectible 
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There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
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liudr
Joined: 15 Nov 2011
Posts: 58
Location: USA
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| Posted: Thu Nov 17, 2011 12:20 am Post subject: |
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| Thanks Neon_WA! So this is an MCU then. With LCD driving capability, it could very possibly be developed for POS or gas pump? |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Thu Nov 17, 2011 12:48 am Post subject: |
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| liudr wrote: | | it could very possibly be developed for POS or gas pump? |
likely application or some other embedded system
Most that get used never see light of day as the systems have a long service life and get dumped when finally out live their purpose
The ones that appear are generally NOS excess stock that has been held by whoever maintains they systems.
When the systems are finally dumped.... the excess chips due to their age and often because they have custom masks for their particular purpose, have no commercial market except for collectors
_________________
There are 10 types of people in this world:
those who understand binary and those who don't. ~Author Unknown
http://www.x86-guide.net/Neon-WA/en/collection.html |
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liudr
Joined: 15 Nov 2011
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Location: USA
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