Am286

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Am286
Am80286-12.jpg
A 68-pin PLCC Am286-12 in a CPU socket
Produced From 1984 to 1990
Marketed by AMD
Designed by Intel
Common manufacturer(s)
  • AMD
Max. CPU clock rate 8 MHz to 20 MHz
FSB speeds 8 MHz to 20 MHz
Min. feature size 1.5 µm
Instruction set x86 (IA-16)
Microarchitecture 80286
Cores 1
L1 cache Motherboard dependent
L2 cache none
Application Desktop, Embedded
Predecessor Am86
Am186
Successor Am386
Package(s)

AMD started in the x86 business being a second-source manufacturer for Intel's chip designs. IBM demanded all its suppliers to have a second manufacturing source, and Intel had to license another company to secure the IBM PC contract. The Am286 was one of the results of this contract, earlier examples being the AMD versions of the 8086, 8088, 80186 and 80188.

Essentially just an 80286, the Am286 was in reality Intel-designed all the way, pin and instruction compatible, based upon Intel's microcode. The chip was later sold by AMD as an embedded processor. It had an advantage over its Intel brethren: a higher clock speed. Intel’s 286s topped out at 12.5 MHz before they switched production to the i386, but AMD continued the production of 286 CPUs and had a 16 MHz version of the 286 for sale in August 1987, later even offering a 20 MHz version.

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