HEF4720VD データシートの表示（PDF） - Philips Electronics

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HEF4720VD

256-bit, 1-bit per word random access memories

Philips Electronics 

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Fig.11 Preferred solution for memory retention; all interface circuits are battery-fed LOCMOS. Note that maximum sink current of the

HEF4042B is about 1,5 mA.

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