Why does a DRAM have fewer pins (I/O connections) than a static RAM of the same size (i.e., capacity in bits)?
What will be an ideal response?
The static RAM receives an entire address that must be stable for the entire read or write cycle. A DRAM captures an address in two (equal) parts; the row and the column. Consequently, DRAMs need half the number of address pins of a static RAM. DRAMs have approximately four times the density of static RAMs.
DRAMs are often bit (or 4?bit) organized, whereas static RAMs are often byte organized. This means that a bit?organized DRAM has one data line and a byte?organized static RAM has 8 data lines. Therefore, DRAMs often have far fewer pins than static RAMs. DRAMs are the preferred choice for very large PC and
workstation memories, whereas static RAM is preferred for small systems such as controllers or instrumentation.
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