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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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 Posted: Wed Mar 25, 2020 7:10 pm Post subject: POLL: Show your INS MCS-4 White or Purple/Gold top chips |
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While most of us are sheltering in place during the coronavirus pandemic, I thought it might be a good time to see what variations there are of National Semiconductor MCS-4 chips.
Limited to White or Purple/ Gold cap versions only.
I'll start with two of my rarest examples of the chips:
INS4004D, Large print, Old logo, 36 week 1976
INS4001-P8, Small print, 31 week 1977
Both have Gold pins.
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Last edited by johnorun on Fri Apr 03, 2020 11:58 pm; edited 1 time in total |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Wed Mar 25, 2020 8:50 pm Post subject: |
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| CPUShack wrote: | INS4004D with silver lid dated 1976 week 38
Pretty rare one |
And it's nice eye-candy! 
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bccwchan
Joined: 20 Sep 2004
Posts: 2585
Location: Hong Kong
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| Posted: Fri Mar 27, 2020 3:17 am Post subject: |
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| Not a rare one but hope that someone will like it. |
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bccwchan
Joined: 20 Sep 2004
Posts: 2585
Location: Hong Kong
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| Posted: Fri Mar 27, 2020 3:26 am Post subject: |
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| forget to put the back. Interesting it said it's "71 DAD" LOL. |
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rjluna2
Joined: 27 Oct 2014
Posts: 1302
Location: Hiram, GA, USA
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| Posted: Fri Mar 27, 2020 7:13 am Post subject: |
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I never see such exposed underneath of these vintage DIP package style  |
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bccwchan
Joined: 20 Sep 2004
Posts: 2585
Location: Hong Kong
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| Posted: Fri Mar 27, 2020 7:44 am Post subject: |
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Should it be made on week 33 year 1975?
Quite early 4001 if so. |
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Fri Mar 27, 2020 10:31 am Post subject: |
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| bccwchan wrote: | Should it be made on week 33 year 1975?
Quite early f4001 if so. |
Yes, the earliest date so far and has bottom brazed pins.
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Fri Apr 03, 2020 11:51 pm Post subject: |
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INS4004D, Old logo w. Large print, 1976 week 38
INS4004D, new logo, Small print, 1977 week 10
Both chips have Silver steel pins.
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cvandijk
Joined: 21 Jul 2016
Posts: 3589
Location: Netherlands
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| Posted: Thu Sep 02, 2021 8:11 am Post subject: |
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| I bought 2kg of scrap for 5 euro locally, and I found a few INS4001 DNG/D with ground strap, unfortunately all are chipped, but I can't complain for the price I paid |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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| Posted: Thu Sep 02, 2021 11:47 am Post subject: |
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| cvandijk wrote: | | I bought 2kg of scrap for 5 euro locally, and I found a few INS4001 DNG/D with ground strap, unfortunately all are chipped, but I can't complain for the price I paid |
lol very well done!
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