The principal criteria involved in designing a memory are:

  1. Cost.
  2. Capacity.
  3. Speed.
  4. Power consumption.
  5. Reliability.
  6. Volatility and access capability.

10-2 STATIC RAM DEVICES

For static memory devices, a cell is commonly implemented using six MOS transistors, as shown in Fig.10-4.

The number of memory cells and their arrangement in a static memory device varies considerably.Common sizes range from 256 x 4 to 16K x 1.

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