Intel licensed 80286 microprocessor to AMD in the second half of
1984. AMD's selection of 80286 microprocessors at that time was very
similar to Intel's - they manufactured 286 CPUs in CLCC, PLCC and
ceramic PGA packages with speed grades up to 12 MHz. In 1985 AMD
followed Intel's lead and changed package type prefixes in their part
numbers: "CG" was replaced with "A", "C" was changed to "R" and "J"
was replaced with "N".
80286 was the last Intel microprocessor licensed to AMD. In 1987
Intel cancelled 1982 technology exchange agreement, as a result AMD
didn't get rights to 80386 CPU. In 1992, after long arbitration
process, AMD was awarded royalty-free rights to manufacture and sell
80386 microprocessors. Been unable to sell their own 80386 chips
before that, the obvious choice for AMD was to prolong life of 80286
family by releasing faster CPU versions. 16 MHz version of the 286
CPU was released in August of 1987. Later AMD introduced 20 and 25
MHz versions of 80286.
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