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The 42-pin chip is labeled as an LC6064 3090 6m2. I am unable to identify it or the company logo. Anyone recognize this?

enter image description here

ocrdu
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Steve
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    The logo is from Sanyo. – StarCat Mar 12 '23 at 21:29
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    if you really want an answer then provide more than the minimal information you provided ... which device is this component from? ... provide a clear, well lit picture of the area surrounding the IC and a picture of the whole PCB ... it may jog someone's memory – jsotola Mar 12 '23 at 22:27
  • You might try asking this on the Retro-computing StackExchange website. There are a lot of people on there who are really good at identifying old chips. – user4574 Mar 12 '23 at 22:54
  • What was said about Retro Computing, for sure. At least in the US, a 42-pin chip is definitely an oddball package. I don't remember ever seeing one back in the day, even in a datasheet. – TimWescott Mar 12 '23 at 23:16
  • There were some parallel ROM/OTPROM/EPROM memory chips in that package. The '64' in the P/N is a bit suggestive. 4M x 16 mask ROM maybe. Just a wild guess. – Spehro Pefhany Mar 12 '23 at 23:59
  • Logo is Sanyo, part may be from late 70's (ish). Here is a fairly similar 42 pin dip available on Ebay: https://www.ebay.com/p/1201611201 – Nedd Mar 13 '23 at 00:54
  • @Nedd 30th week of 1990, maybe? Assuming they were using the Western calendar, and not Shōwa era dates or whatever. – Spehro Pefhany Mar 13 '23 at 01:07
  • Assuming approximate manufacturing date 1990, [here](https://pdf.datasheetcatalog.com/datasheet_pdf/macronix-international/MX23C6410PC-10_to_MX23C6410PC-15.pdf) is a similar era part in the same package from another manufacturer. – Spehro Pefhany Mar 13 '23 at 01:11
  • Hi all, thanks for the prompt and helpful feedback. On further inspection of the CB from which the chip came, it looks like it is from an old digital clock with a 4x7 segment vacuum fluorescent display similar to this one, https://electronics.stackexchange.com/questions/8219/help-wanted-with-vacuum-fluorescent-display-vfd – Steve Mar 14 '23 at 21:23
  • All I need is a datasheet and maybe I can put this chip to some use. Thanks. – Steve Mar 14 '23 at 21:29

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