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The minimum size of the ROM which maintains truth table of square of 3 bit numbers is __________ (in bits)
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B1 is always 0 so it need not be stored and B0 is the same as LSB of input so no need of storing it.  Therefore we are reduced to 4 outputs B5 B4 B3 B2 and total number of rows in truth table is 8 and we need 8 rows for each number .. making the rom 8*4

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