64K x 1 Dynamic Random-Access Memory (DRAM), High-Speed 200ns Access Threshold, 0°C to +70°C Standard Operational Window, 16-Pin Plastic Dual In-Line Package (PDIP) Footprint | High-performance monolithic MOS volatile storage memory chip featuring a standard +5V primary power rail layout and single-layer polysilicon cells, explicitly engineered to coordinate high-density data buffers and refresh cycles inside vintage computing motherboards | Industry Exact Equivalents: Fujitsu MB8264-20, MB8264-20 Memory, Fujitsu 8264-20 | Industry Functional Cross-References: Texas Instruments TMS4164-20NL, Motorola MCM4164P20, Mostek MK4564N-20, Intel 2164A-20🖥️ Historical System Hardware Applications (Systems Utilizing 4164 / 8264 64K DRAM)Commodore 64 (C64) Home Computer: Used as the primary system RAM layout (8 individual 64Kx1 chips grouped together to establish the complete 64-Kilobyte system memory field).IBM Personal Computer (PC) XT (Model 5160): Leveraged across the primary motherboard banks and specialized memory expansion cards to ramp base operating configurations up to the standard 640KB DOS limit.Apple IIe Personal Computer: Deployed directly on the central auxiliary motherboard slot card arrays to handle extended 80-column display functions and power double-high-resolution graphics logic modes.Atari 800XL Home Computer: Embedded directly within the main system processing board to maximize standard memory boundaries for high-performance 8-bit gaming code execution.Radio Shack TRS-80 Color Computer 2: Integrated into later mainboard manufacturing revisions to easily update fractional 16KB system spaces into a complete 64KB RAM architecture block.
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