MOFSET is also one type of SRAM chip, and other is bipolar junction transistor. It needs 6 MOFSET (metal-oxide-semiconductor field-effect transistor) to hold per memory bit. Due to read and write operations, other two access transistors are used to handle the availability for memory cell. SRAM holds a bit of data on 4 transistors with using of 2 cross coupled inverters, and it has two stable states like as 0 and 1. SRAM helps to store every bit with using of bistable latching circuitry, and typically it used six MOSFET to store every memory bit but extra transistor become at smaller nodes. Flip-flop uses 4-6 transistors for making a memory cell and its circuit do not need to refreshment continuously. Flip-flop contains the every bit of this Ram. In SRAM, All data has been stored in flip-flop. So, SRAM is used mostly in to small size applications like as CPU cache memory and hard drive buffers, compact discs (CD’s), printers, modem, routers, digital versatile discs (DVD’s) and digital cameras. Due to this, SRAM chips have not ability to hold much data compare to DRAM. Static Ram is more expensive because it is made with using of much complicated structure, and its complexity is also limited for storing amount of data into one chip. Main objective of using the static RAM is to make Cache Memory.
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