SRAM (static RAM):

• Static Ram is random access memory (RAM) that retains data bits in its memory as long as power is being supplied.
• Unlike dynamic RAM (DRAM), which stores bits in cells consisting of a capacitor and a transistor, SRAM does not have to be periodically refreshed.
• Static RAM provides faster access to data and is more expensive than DRAM.
• SRAM is used for a computer's cache memory and as part of the random access memory digital-to-analog converter on a video card.
• Static random-access memory (static RAM or SRAM) is a type of semiconductor memory that uses bistable latching circuitry (flip-flop)to store each bit.
• SRAM exhibits data remanence,but it is still volatile in the conventional sense that data is eventually lost when the memory is not powered.
• SRAM memory, on the other hand, does not need to be refreshed at all. Static RAM maintains its information as along as the chip has enough power to keep its data.
• The reason is because SRAM chips are made of a flip-flop circuit which does not need constant refreshing.
• Another benefit to static random access memory is very fast access speed, much faster than DRAM.
• The reason behind this speed is a configuration of six transistors which keeps current flowing in one direction or the other (the 0 or 1 state).
• Each state can be written and read instantly, and therefore the chip does not require a capacitor to fill up or drain. However, the six transistors use more space than DRAM cells which are composed of one transistor and one capacitor.