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Intel 1103 information


Intel 1103
A ceramic C1103 variant.
Media type8 μm p-MOS DRAM
Capacity1 kilobit
Standard18-pin DIP
Developed byIntel
UsageHP 9800 series,[1] PDP-11,[2] MAXC[3] and others
ReleasedOctober 1970 (1970-10)[4]
Discontinued1979[5]

The 1103 is a dynamic random-access memory (DRAM) integrated circuit (IC) developed and fabricated by Intel. Introduced in October 1970, the 1103 was the first commercially available DRAM IC; and due to its small physical size and low price relative to magnetic-core memory, it replaced the latter in many applications.[6][1] When it was introduced in 1970, initial production yields were poor, and it was not until the fifth stepping of the production masks that it became available in large quantities during 1971. Intel shipped the 250,000th 1103 RAM at June 1974.[7]

  1. ^ a b Mary Bellis (August 25, 2016). "Who Invented the Intel 1103 DRAM Chip". ThoughtCo.
  2. ^ PDP-11/45, 11/50, and 11/55 System Maintenance Manual (PDF). Digital Equipment Corporation. September 1976.
  3. ^ Fiala, Edward R. (May 1978). "The Maxc Systems" (PDF). GitHub. IEEE Computer Society. Retrieved October 12, 2022. The most significant contributor to reliability has been main-memory error correction. During the first six months of operation, we replaced about 12 failing 1Kx1 MOS RAMs per month (out of a population of 18,432 chips): this has gradually declined to about three failures a month during the last three years. However, because of error correction, a negligible number of these failures has caused crashes.
  4. ^ "Defining Intel: 25 Years/25 Events" (PDF). Intel Corporation. Page 6.
  5. ^ Intel Corporation, "The 1103 retires!", Intel Preview, March/April 1979, page 23
  6. ^ Jacob, Bruce et al. (2008). Memory Systems: Cache, DRAM, Disk. Morgan Kaufmann Publishers. pp. 457–458.
  7. ^ A Milestone for the 1103

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