MB7072 / HM10422 / HM100422 256-word x 4-bit ECL RAM in a Ceramic High Grade Package, DIP-24 Package. Fully compatible with 10K ECL level, Address access time: 10ns (max), Write pulse width: 6ns (min). This Ram is NOS and found on Nintendo Arcade games such as Donkey Kong, Donkey Kong Junior (Jr), Donkey Kong 3 and many others that use this special Ram and replaces Nintendo manual part numbers listed are MB7072, TKG-05-22B. This Ram chip can replace any of the following F10422, MBM10422, MBM100422 and many others.
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