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Question

A RAM chip has capacity of 1024 words of 8 bits
each 1K×8. The number of 2×4 decoders with
enable line needed to construct a 16K×16RAM
from 1K×8RAM is

A
5
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B
7
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C
6
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D
4
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Solution

The correct option is A 5
We need 16K×16RAMfrom 1K×8RAM

So, number of chips required

=16K×161K×8=16×2

So we need 16 output lines




We need 5 decoders

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