SRAM (Static Random Access Memory) can retain the data bits in the memory till there is a power supply. The SRAM need not be refreshed periodically and can provide faster data access than the DRAM. It is usually used for any computer’s cache memory. It is more expensive than the DRAM.
The circuit generally has four transistors that are set up as two cross-coupled inverters. There are two stable states that are the "0" and "1" states. The SRAM can work at higher speeds than any DRAM and is expensive to produce due to its complex structure.
The different types of SRAM are as follows:
According to the type of transistor, it can be classified into:
According to the features, they can be classified as:
There are several scientific and industrial systems, embedded systems and automotive electronics that contain SRAM. In some cases, the SRAM in its dual-ported form can be used for real-time digital signal processing circuits. The SRAM is also used in routers, computers and workstations, internal CPU caches, etc.
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