Semiconductor memory is a digital electronic semiconductor device used for digital data storage, such as computer memory.
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15 Facts About MOS memory
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2.
Semiconductor MOS memory has much faster access times than other types of data storage; a byte of data can be written to or read from semiconductor MOS memory within a few nanoseconds, while access time for rotating storage such as hard disks is in the range of milliseconds.
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3.
Shift registers, processor registers, data buffers and other small digital registers that have no MOS memory address decoding mechanism are typically not referred to as MOS memory although they store digital data.
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4.
The MOS memory cells are laid out in rectangular arrays on the surface of the chip.
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5.
The 1-bit MOS memory cells are grouped in small units called words which are accessed together as a single MOS memory address.
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6.
Data is accessed by means of a binary number called a MOS memory address applied to the chip's address pins, which specifies which word in the chip is to be accessed.
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7.
Volatile MOS memory loses its stored data when the power to the MOS memory chip is turned off.
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8.
Early computer MOS memory consisted of magnetic-core MOS memory, as early solid-state electronic semiconductors, including transistors such as the bipolar junction transistor, were impractical for use as digital storage elements.
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9.
Bipolar semiconductor MOS memory made from discrete devices was first shipped by Texas Instruments to the United States Air Force in 1961.
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10.
Bipolar MOS memory failed to replace magnetic-core MOS memory because bipolar flip-flop circuits were too large and expensive.
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11.
MOS memory was developed by John Schmidt at Fairchild Semiconductor in 1964.
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12.
MOS memory overtook magnetic core memory as the dominant memory technology in the early 1970s.
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13.
Synchronous dynamic random-access MOS memory later debuted with the Samsung KM48SL2000 chip in 1992.
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14.
Programmable read-only MOS memory was invented by Wen Tsing Chow in 1956, while working for the Arma Division of the American Bosch Arma Corporation.
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15.
Flash MOS memory was invented by Fujio Masuoka at Toshiba in the early 1980s.
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