Rare Intel A80487SX B0 SZ494 A4 CPGA-169 very nice not tested for collection

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Rare Intel A80487SX B0 SZ494 A4 CPGA-169 very nice not tested for collection:
$40.00

Intel A80487SX specificationsGeneral informationTypeFloating Point Unit / Co-processorFrequency15 MHz - 25 MHzPackage169-pin Pin Grid Array
1.75\" x 1.75\" (4.45 cm x 4.45 cm)S-spec numbersProduction processorsPart / MicroarchitectureData width32 bitFloating Point UnitIntegratedLevel 1 cache size8 KB 4-way set associative unified code and data cachePhysical memory4 GBLow power featuresLow frequency operation - from 2 MHz to maximum frequency.Electrical / Thermal parametersMinimum/Maximum operating temperature0°C - 85°CTypical/Maximum power dissipation0.5 Watt (2 MHz) / 0.83 Watt (2 MHz)
2 Watt (16 MHz) / 2.89 Watt (16 MHz)
2.38 Watt (20 MHz) / 3.3 Watt (20 MHz)
2.5 Watt (25 MHz) / 3.85 Watt (25 MHz)Notes on Intel A80487SX

The co-processor should be installed into OverDrive processor socket
The co-processor supports low power version of 80486 processors.