Question

An SRAM has address lines from A₀ to A₁₉ and data width from D₀ to D₁₅. The total capacity of the SRAM will be:
1. 2 Mb
2. 16 Mb
3. 8 Mb
4. 4 Mb

Answer 1

Correct Answer - Option 1 : 2 Mb

Concept:

The total capacity of memory is given by:

2^{no. of address lines} × No. of data lines.

Calculation:

Given:

No. of address lines = 20 (A₀ to A₁₉)

No. of data lines = 16 (D₀ to D₁₅)

The total capacity of memory will be:

= 2²⁰ × 16 bits

= 2²⁰ × 2 × 8 bits

\(= 2 \times \underbrace {{2^{20}}}_{Mega} \times \underbrace {8bits}_{Bytes}\)

= 2 MB