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Difference Between SRAM and SDRAM

Difference Between SRAM and SDRAM


What is difference between SRAM and SDRAM? SRAM (random static synchronized access memory) is a type of data storage of the equipment, which does not need frequent updates. Which means that the information of a computer memory area does not have to be read and rewritten, to the same area, every so often, hence its static name?  While the SDRAM (synchronized dynamic random access memory), it is a type of computer storage that needs frequent updates but has a synchronous interface. Which means that it refers to the microprocessor clock before it responds and then synchronizes with the computer’s system bus? Below this post is all about the difference between SRAM and SDRAM.

Difference Between SRAM and SDRAM

Since SRAM does not need constant updates, its access speed range is faster than SDRAM, whose access speed range depends on the clock speed. But, although the access time is better, the performance perceived by the user is based on the coordination of access times with the clock cycle. Access time consists of latency and time transfer. Latency is the time coordinating the temporary signal and updating data after reading them. However, people prefer to use the SRAM more often because of its ease of interface. There is no update cycle and the address and data buses are directly accessible.

But how about your capacity? SRAM uses the type of memory called flip-flop that is used for the storage of digital data. The content of the memory can be maintained as long as there is power. While the SDRAM uses the type of cell memory, called capacitors that need to be updated periodically. But since there are a few transistors in a flip-flop memory, it takes up much more space than a capacitor. The DRAM memory can pack several gigabits on a DRAM chip, while the SDRAM memory can only pack a few tens of mega bits on its chip.

Another thing that we should consider is your energy consumption. Considering that SDRAM should be updated from time to time, it gives an electronic load every few nanoseconds and therefore consumes more energy. The temperature range in some way also contributes to the energy consumption of these memories. With the SRAM the power consumption is completely stable between -55C and 125 C. Unlike SDRAM, as well as another type of DRAM, the refresh rate at high temperatures, consumes much more power, even if memory is not accessed.

Finally, we all know the rules in the world of technology. The easiest and simplest is the most expensive. As SRAM is considered to be even faster in speed, it is also continuously charged more expensive than SDRAM. However, we must remember, always choose what is best for our needs.


  • The SRAM is static (it does not need to be able to update periodically) while the SDRAM is dynamic (it needs to be able to update periodically).
  • The access speed of SDRAM is clock-dependent, while SRAM accesses directly.
  • The DRAM memory can pack several gigabits on a DRAM chip, while the SDRAM memory can only pack several tens of mega bits on its chip.
  • The consumption of the SRAM is stable, while that of the SDRAM is higher due to the update cycles.
  • SRAM is more expensive than SDRAM because of its higher speed.

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