K565RU5 (pin-compatible to 4164 DRAM chip) - 64 Kib DRAM chip, heart of most of amateur computers made in late soviet times and early 90's. There was also RU7 chip (256 Kib) but it was hard to buy.
Die size 5645x2612 µm.
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Die size 5645x2612 µm.
