Unidentified Integrated Circuit - NEC 24 Prong

Today I was taking apart an old typewriter and I have this IC that was in a socket. I took it out and started searching online to see what this IC does. I spent 20 minutes and nothing showed up about it. It is a

 NEC 833IE9
D2364EC 071.


Any Help?

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The question has insufficient information for a definitive answer, a photo would help.

Going by the description of it being a 24-pin device, and that it was socketed (which implies DIP, and also suggests replacement being a maintenance option), it could be this NEC ROM device: nMOS μPD2364, 64 kilobit, 5 Volt TTL ROM, programmed at fabrication by the manufacturer.

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In other words I think it's a ROM (read only memory) chip. I can't find anywhere selling them so they probably don't manufacture them anymore. (It is a old typewriter after all.) Is it near a micro or an fpga or something? That might help us figure out the mystery.