Computing Dictionary
static random-access memory definition
storage (SRAM)
Random-access memory in which each bit of storage is a bistable
flip-flop, commonly consisting of cross-coupled
inverters. It is called "static" because it will retain a value as long as power is supplied, unlike
dynamic random-access memory (DRAM) which must be regularly refreshed. It is however, still
volatile, i.e. it will lose its contents when the power is switched off, in contrast to
ROM.
SRAM is usually faster than DRAM but since each bit requires several transistors (about six) you can get less bits of SRAM in the same area. It usually costs more per bit than DRAM and so is used for the most speed-critical parts of a computer (e.g.
cache memory) or other circuit.
(1995-04-22)
