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A RAM chip has a capacity of 1024 words of 8 bits each (1K × 8). The number of 2 × 4 decoders with enable line
needed to construct a 16K × 16 RAM from 1K × 8 RAM is
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- 4
- 5
- 6
- 7
- 4
Correct Option: B
RAM chip size = 1K × 8 [1024 words of 8 bits each] RAM to construct = 16K × 16
| Number of chips required = | = 16 × 2 | |
| 1K × 8 |
So, to select one chip out of 16 vertical chips, we need 4 × 16 decoder. Available decoder is 2 × 4 decoder. So we need 5 decoder in total.
