K4R521669 series datasheets. Manufacturer: Samsung Electronic.

K4R521669A 250 to 0.13V; 512/576Mbit short channel direct 1066MHz RDRAM (A-die) ; 1M x 16 / 18bit x 32s banks in 144-pin FBGA package. Datasheet*) K4R761869A 250 to 0.13V; 512/576Mbit short channel direct 1066MHz RDRAM (A-die) ; 1M x 16 / 18bit x 32s banks in 144-pin FBGA package. Datasheet*)

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