SRAM (static random access memory) is a type of RAM (random access memory) that retains its contents as long as the power is not interrupted. It is different from DRAM (dynamic random access memory), which must be refreshed periodically. SRAM is fast and efficient, but also relatively expensive and requires more power than DRAM.
SRAM is often used in computers for storing instructions and data. It is used in cache memory that increases system performance by providing faster access to instructions and data that are frequently used. SRAM is also used in many embedded systems, where low power and portability are more important than speed.
SRAM is generally used as a kind of primary storage, and is typically composed of flip-flops. Flip-flops are integrated circuits that can store one data bit and then switch it from one state to another state. Each bit is stored in a single flip-flip, so SRAM is usually composed of many flip-flops connected together.
Unlike dynamic RAM, there is no need to periodically refresh the memory in SRAM. Therefore, it is faster and more reliable than DRAM, making it the ideal choice for applications where reliability and speed are the top priority. However, its higher power consumption and cost make it less suitable for applications where portability and energy efficiency are important.
SRAM is available in various sizes, ranging from 128 bytes to 64 Megabytes. It is also available in a variety of packages, including DIP, SOIC, PGA, and BGA.
