MB81257-12
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262,144 x 1-Bit Dynamic Random Access Memory (DRAM), nibble mode layout variant architecture, 120ns access speed, 16-pin Plastic DIP. 100% Exact Replacements: Toshiba TC51257P-12, Hitachi HM50257P-12, NEC uPD41257D-12, Texas Instruments TMS4257-12NL.
I112