Consider the following statements comparing static RAM with dynamic RAM: In static RAM typical cell requires more number of transistors than the dynamic RAM. Power consumption per bit of static RAM is less than that of dynamic RAM. Dynamic RAM is less expensive than the static RAM. Which of the above statements are correct?
Consider the following statements comparing static RAM with dynamic RAM: In static RAM typical cell requires more number of transistors than the dynamic RAM. Power consumption per bit of static RAM is less than that of dynamic RAM. Dynamic RAM is less expensive than the static RAM. Which of the above statements are correct? Correct Answer 1 and 3 only
SRAM: The SRAM memories consist of circuits capable of retaining the stored information as long as the power is applied i.e. it requires constant power. SRAM memories are used to build cache memory. It can retain stored data indefinitely and it can be implemented as a flip flop circuit to store one bit of information.
DRAM: DRAM stores the binary information in the form of electric charges that applied to capacitors. The stored information on the capacitors tends to lose over a period of time and thus the capacitors must be periodically recharged to retain their users. The main memory is generally made up of DRAM chips.
Differences between SRAM and DRAM:
|
SRAM |
DRAM |
|
It has lower access time, so it is faster compared to DRAM |
It has higher access time, so it is slower than SRAM |
|
It is costlier than DRAM |
It costs less compared to SRAM |
|
As it requires a constant power supply, consumes more power |
It offers reduced power consumption due to the fact that the information is stored in the capacitor |
|
Due to complex internal circuitry, less storage capacity is available compared to the same physical size of the DRAM memory chip. |
Due to small internal circuitry, large storage capacity is available |
|
It has low storage density |
It has a high storage density |
