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All data sheets are subject to change without notice
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
Math Coprocessor
80387DX
©2002 Maxwell Technologies
All rights reserved.
05.07.02 REV 1
FEATURES:
• 80-Bit numeric processor
RAD-PAK® radiation hardened against natural space radia-
tion
Total dose hardness:
- > 100 krad (Si)
- dependant upon space mission
Single Event Effects:
- SEU Threshold is ~ 3.38 MeV/mg/cm
2
- SEL Threshold = 37.1 - 59.9 MeV/mg/cm
2
Package: 68-pin RAD-PA® quad flat pack
Eight 80-bit numeric registers, usable as individual addres-
sable 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 micro-
processors
Full-range transcendental operations for SINE, COSINE,
TANGENT, ARCTANGENT and LOGARITHM
DESCRIPTION:
Maxwell's 80387DX high speed microcircuit features a greater
than 100 kilorad (Si) total dose tolerance. Using Maxwell'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, mak-
ing the 80386DX/80387DX a complete solution for high-per-
formance numerics processing.
Maxwell Technologies' patented RAD-PAK packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. 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.
Logic Diagram
80387