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1 m e m o r y 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 f eatures : ? 80-bit numeric processor r ad -p ak ? 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 r ad -p a ? quad flat pack eight 80-bit numeric register s, 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 d escription : maxwell's 80387DX high speed microcircuit features a greater than 100 kilorad (si) total dose tolerance. using maxwell's radiation hardened r ad -p ak ? 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 r ad -p ak 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, r ad -p ak provides greater than 100 krad (si) radiation dose tolerance. this product is available with screening up to class s. logic diagram logic diagram 80387
m e m o r y 2 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX t able 1. p inout d escription p in s ymbol d escription 1, 12, 19, 21, 35, 49, 53, 56 v ss ground 2, 13, 20, 32, 36, 39, 52, 68 v cc positive power supply 3-11, 18, 22-31, 33, 34, 37, 38, 40, 41, 64-67 d4-d12, d15, d16-25, d26, d27, d28, d29, d30, d31, d0-d3 data bus 42 ckm clock mode 43 386clk2 386 cpu clock 2 44 387clk2 387 mcp clock 2 45 resetin system reset 46 nc not connected 47 59 tie high tie high 48 ready bus ready input 50 cmd0 command 51 ads address strobe 54 nps2 mcp select #2 55 nps1 mcp select #1 57 w/r write/read 58 sten status enable 60 readyo ready output 61 busy busy status 62 error error status 63 pereq processor extension request t able 2. a bsolute m aximum r atings p arameter s ymbol m in m ax u nit voltage, any pin, with respect to ground v cc -0.5 v cc +0.5 v power dissipation p d -- 1.5 w storage temperature range t s -65 150 c operating temperature range t a -55 125 c lead temperature (soldering 10 seconds) -- 260 c
m e m o r y 3 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX t able 3. d elta l imits p arameter v ariation i li 1.5 a i lo 1.5 a i cc clk2 = 32 mhz 25 ma i cc clk2 = 50 mhz 39 ma t able 4. r ecommended o perating c onditions p arameter s ymbol m in m ax u nit supply voltage v cc 4.75 5.25 v input low voltage v il -0.3 0.8 v input high voltage v ih 2.0 v cc +0.3 v operating temperature t a -55 125 c t able 5. 80387DX dc e lectrical c haracteristics (v cc = 4.75v to 5.25v; t a = -55 to +125c, unless otherwise specified ) p arameter s ymbol t est c onditions m in m ax u nit input low voltage v il 1 1. this parameter is for all inputs, including 387clk2 but excluding 386clk2. -- -- 0.8 -- v input high voltage v ih 1 2.0 -- v 386 clk2 input low voltage v cl -- 0.8 v 386 clk2 input high voltage v ch 3.7 -- v output low voltage v ol i ol = 4 ma, d0-d31, i ol = 2.5 ma readyo , error, busy, pereq -- 0.45 v output high voltage v oh i oh = -1 ma, d0-d31, i oh = -0.6 ma readyo, readyo, error, busy, pereq 2.4 -- v input leakage current i li 0v < v in < v cc 15 a output leakage current i lo 0.45v < v out < v cc -- 15 a power supply current i cc clk2 = 32 mhz clk2 = 40 mhz clk2 = 50 mhz 2 2. icc is measured at steady state, maximum capacitive loading on the outputs, and worst-case dc level at the inputs; 386clk2 at the same frequency as 387clk2. -- -- -- 250 310 390 ma input capacitance 3 3. guaranteed by design c in f c = 1 mhz -- 10 pf output capacitance 3 c o f c = 1 mhz -- 12 pf clk2 capacitance 3 c clk f c = 1 mhz -- 20 pf
m e m o r y 4 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX t able 6. 80387DX c ombinations of b us i nterface and e xecution s peeds (v cc = 4.75v to 5.25v; t a = -55 to +125c, unless otherwise specified ) p arameter s ymbol t est c onditions m in m ax u nit bus interface unit -16 -20 -25 16 20 25 -- -- -- mhz execution unit -16 -20 -25 16 20 25 -- -- -- mhz t able 7. 80387DX t iming r equirements of t he e xecution u nit (v cc = 4.75v to 5.25v; t a = -55 to +125c, unless otherwise specified ) p arameter s ymbol t est c ondition m in m ax u nit 387clk2 period 1 -16 -20 -25 1. guaranteed by design t 1 at 2v 31 25 20 125 125 125 ns 387clk2 high time -16 -20 -25 t 2a at 2v 9 8 7 -- -- -- ns 387clk2 high time 1 -16 -20 -25 t 2b at 3.7v 5 5 4 -- -- -- ns 387clk2 low time -16 -20 -25 t 3a at 2v 9 8 7 -- -- -- ns 387clk2 low time 1 -16 -20 -25 t 3b at 0.8v 7 6 5 -- -- -- ns 387clk2 fall time 1 -16 -20 -25 t 4 at 3.7v to 0.8v -- -- -- 8 8 7 ns 387clk2 rise time 1 -16 -20 -25 t 5 at 0.8v to 3.7v -- -- -- 8 8 7 ns
m e m o r y 5 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX t able 8. 80387DX t iming r equirements of t he b us i nterface u nit (o utput t rip l evel = 1.5v) (v cc = 4.75v to 5.25v; t a = -55 to +125c, unless otherwise specified ) p arameter c onditions s ymbol m in m ax u nit 386clk2 period 1 -16 -20 -25 at 2.0v t 1 31 25 20 125 125 125 ns 386clk2 high time -16 -20 -25 at 2.0v t 2a 9 8 7 -- -- -- ns 386clk2 high time1 -16 -20 -25 at 3.7v t 2b 5 5 4 -- -- -- ns 386clk2 low time -16 -20 -25 at 2v t 3a 9 8 7 -- -- -- ns 386clk2 low time 1 -16 -20 -25 at 0.8v t 3b 7 6 5 -- -- -- ns 386clk2 fall time 1 -16 -20 -25 at 3.7v to 0.8v t 4 -- -- -- 8 8 7 ns 386clk2 rise time 1 -16 -20 -25 at 0.8v to 3.7v t 5 -- -- -- 8 8 7 ns 386 clk2/387clk2 ratio -- 10/16 14/10 -- readyo out delay -16 -20 -25 c l = 50 pf t 7 4 3 3 34 31 24 ns pereq, error out delay -16 -20 -25 c l = 50 pf t 7 5 5 4 34 34 33 ns busy out delay -16 -20 -25 c l = 50 pf t 7 5 5 4 34 29 29 ns
m e m o r y 6 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX d31 - d0 out delay -16 -20 -25 c l = 50 pf t 8 1 1 0 54 54 50 ns d31 - d0 setup time t 10 11 ns d31 - d0 hold delay t 11 11 ns d31 - d0 float time -16 -20 -25 c l = 50 pf 2 t 12 6 6 5 33 27 24 ns pereq, busy , error , readyo float time 1 -16 -20 -25 c l = 50 pf 1 t 13 1 1 1 60 50 40 ns ads , w/r setup time -16 -20 -25 t 14 26 21 16 -- -- -- ns ads , w/r hold time -16 -20 -25 t 15 5 5 4 -- -- -- ns ready setuptime -16 -20 -25 t 16 21 12 9 -- -- -- ns ready hold time -16 -20 -25 t 17 4 4 4 -- -- -- ns cmdo setuptime -16 -20 -25 t 16 21 19 16 -- -- -- ns cmdo holdtime -16 -20 -25 t 17 2 4 4 -- -- -- ns nps1, nps2 setup time -16 -20 -25 t 16 21 19 16 -- -- -- ns t able 8. 80387DX t iming r equirements of t he b us i nterface u nit (o utput t rip l evel = 1.5v) (v cc = 4.75v to 5.25v; t a = -55 to +125c, unless otherwise specified ) p arameter c onditions s ymbol m in m ax u nit
m e m o r y 7 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX nps1, nps2 hold time -16 -20 -25 t 17 2 2 4 -- -- -- ns sten setup time -16 -20 -25 t 16 21 21 15 -- -- -- ns sten hold time -16 -20 -25 t 17 2 2 4 -- -- -- ns resetin setup time -16 -20 -25 t 18 13 12 10 -- -- -- ns resetin hold time -16 -20 -25 t 19 4 4 3 -- -- -- ns 1. guaranteed by design 2. float condition occurs when maximum output current becomes less than i lo in magnitude. float delay is not tested. t able 9. 80387DX t iming r equirement of o ther p arameter p arameter s ymbol m in m ax u nit resetin duration t 30 40 (387 clk2) resetin inactive to first opcode write t 31 50 (387 clk2) busy duration t 32 6 (386 clk2) error inactive to busy inactive t 33 6 (386 clk2) pereq inactive to error active t 34 6 (386 clk2) ready active to busy active t 35 4 4 (386 clk2) ready minimum time from opcode write to opcode to opcode/ operand write t 36 6 (386 clk2) ready minimum time from operand write to operand write t 37 8 (386 clk2) t able 8. 80387DX t iming r equirements of t he b us i nterface u nit (o utput t rip l evel = 1.5v) (v cc = 4.75v to 5.25v; t a = -55 to +125c, unless otherwise specified ) p arameter c onditions s ymbol m in m ax u nit
m e m o r y 8 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX f igure 1. t iming d iagrams - f ast t ransitions to and from p ipelined c ycles
m e m o r y 9 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX f igure 2. t iming d iagram ? n on - pipelined r ead and w rite c ycles
m e m o r y 10 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX f igure 3. t iming d iagram ? p iplined c ycles with w ait s tates f igure 4. t iming d iagram ? sten, busy, and pereq t iming r elationship
m e m o r y 11 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX f igure 5. t iming d iagram ? 386clk2/387clk2 w aveform and m easurement p oints for i nput / o utput ac s pecifications f igure 6. t iming d iagram ? t est c ircuit
m e m o r y 12 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX f igure 7. t iming d iagram ? r eset f igure 8. t iming d iagram ? o utput
m e m o r y 13 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX f igure 9. t iming d iagram ? i nput and i/o s ignals
m e m o r y 14 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX f igure 10. t iming d iagram ? f loat from sten f igure 11. t iming d iagram ? o ther p arameters
m e m o r y 15 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX note: all dimensions in inches. q68-01 14 p in r ad -p ak ? f lat p ackage s ymbol d imension m in n om m ax a 0.121 0.135 0.145 b 0.016 0.018 0.020 c 0.008 0.010 0.012 d 0.940 0.950 0.960 d1 0.800 bsc e 0.050 bsc s1 0.013 0.066 -- f1 0.645 0.650 0.655 f2 0.645 0.650 0.655 l 0.477 0.487 0.497 a1 0.080 0.090 0.100 n68
m e m o r y 16 05.07.02 rev 1 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. math coprocessor 80387DX important notice: these data sheets are created using the chip manufacturer?s published specifications. maxwell technologies verifies functionality by testing key parameters either by 100% testing, sample testing or characterization. the specifications presented within these data sheets represent the latest and most accurate information available to date. however, these specifications are subject to change without notice and maxwell technologies assumes no responsibility for the use of this information. maxwell technologies? products are not authorized for use as critical components in life support devices or systems without express written approval from maxwell technologies. any claim against maxwell technologies must be made within 90 days from the date of shipment from maxwell tech- nologies. maxwell technologies? liability shall be limited to replacement of defective parts.

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