D4164C-3

64K x 1-Bit High-Speed Dynamic RAM (DRAM) chip manufactured by NEC (Nippon Electric Company). This vintage volatile memory component provides exactly 65,536 bits of primary storage organized in a single-bit-wide layout, engineered with an accelerated 150-nanosecond access time rating (indicated by the "-3" speed code designation). It functions by storing binary data as microscopic electrical charges inside internal capacitive cells, utilizing an internal page-mode architecture to drastically reduce latency by allowing sequential column bits to be accessed rapidly within a single row address strobe. It was universally deployed as main system memory or video frame-buffers across iconic home computers like the Commodore 128, Atari ST variants, IBM PC/XT clones, and numerous 1980s arcade system motherboards. (Industry Equals: NEC uPD4164C-3, Hitachi HM4864P-15, Toshiba TMM4164AP-15, Fujitsu MB8264-15, Samsung KM4164B-15, OKI MSM3764-15). [1, 2, 3]