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80387DX Math Coprocessor

Discontinued Product. Please contact the factory for the latest replacement.


Part Number(s): 80387DX

DDC's 80387DX high speed microcircuit features a greater than 100 kilorad (Si) total dose tolerance. Using DDC's radiation hardened RAD-PAK® packaging technology, the 80387DX is a high-performance numerics processor that extends the 80386DX architecture with floating point, extended integer and BCD data types. The computing system fully conforms to the ANSI/IEEE floating-point standard. Using a numerics oriented architecture, the 80387DX adds over seventy mnemonics to the 80386DX instruction set, making the 80386DX/80387DX a complete solution for high-performance numerics processing.

DDC's patented RAD-PAK packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission. In a GEO orbit, RAD-PAK provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S.


  • 80-Bit numeric processor
  • RAD-PAK® radiation hardened against natural space radiation
  • Total dose hardness:
    • > 100 krad (Si) - dependent upon space mission
  • Single Event Effects:
    • SEU Threshold is ~ 3.38 MeV/mg/cm2
    • SEL Threshold = 37.1 - 59.9 MeV/mg/cm2
  • Package: 68-pin RAD-PAK® quad flat pack
  • Eight 80-bit numeric registers, usable as individual addressable general registers or as a register stack
  • Data types include:
    • 32-, 64-, 80-bit floating point
    • 32-, 64-bit integers
    • 18-digit BCD operands
  • 5 V Only power
  • Built-in exception handling
  • Upward object code compatible with All 80X87DX microprocessors
  • Full-range transcendental operations for SINE, COSINE, TANGENT, ARCTANGENT and LOGARITHM




80387DX Math Coprocessor Data Sheet


How Rad Hard Do You Need? The Changing Approach To Space Parts Selection?

Proton Transport An Examination of Model and Experimental Data For Space Environment Protons

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