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Last update: 20 September 2004

IC number:80387SX
IC function:Floating-point co-processor
Related components:8087, 80287 (predecessors), 80387DX (full version), 80486DX, 80486DX2 (successors), 80386SX (main processor)

Component documentation
IC numberManufacturerDocumentation
i387SX (80387SX)IntelDatasheet (PDF)

Component versions
IC numberPackage
N80387SX68-pin PLCC

Positions
DevicePositionPackage
A2386U102 (not installed)PLCC
SL386SX CPU card w/cache DB1U102 (not installed)PLCC
SL286/SL386SX CPU card DB2U102 (not installed)PLCC

Pinout
PinTypeNameSignal name
SL386SX CPU card DB1SL386SX CPU card DB2
1N/CNCunused
2..3I/OD07..D06CD7..CD6D7..D6
4PowerVCCVCC
5PowerVSSGND
6..8I/OD05..D03CD5..CD3D5..D3
9PowerVCCVCC
10N/CNCunused
11..12I/OD15..D14CD15..CD14D15..D14
13PowerVCCVCC
14PowerVSSGND
15..16I/OD13..D12CD13..CD12D13..D12
17..18N/CNCunused
19..20I/OD00..D01CD0..CD1D0..D1
21PowerVCCVCC
22PowerVSSGND
23I/OD02CD2D2
24I/OD08CD8D8
25PowerVSSGND
26PowerVCCVCC
27PowerVSSGND
28..30I/OD09..D11CD9..CD11D9..D11
31PowerVCCVCC
32PowerVSSGND
33PowerVCCVCC
34PowerVSSGND
35OutputERROR#NERRORNPX
36OutputBUSY#NBUSYNPX
37PowerVCCVCC
38PowerVSSGND
39PowerVCCVCC
40InputSTENSTEN_PU
41InputW/R#386CB6W_NR_NS0
42PowerVSSGND
43PowerVCCVCC
44InputNPS1#386CB4M_NIO
45InputNPS2CA23A23
46PowerVCCVCC
47InputADS#386CB3NADS
48InputCMD0#CA2A2
49InputREADY#NCRDYNRDY0320
50PowerVCCVCC
51InputRESETINRESNPX
52N/CNCunused
53InputNUMCLK2NUMCLK2_PU
54InputCPUCLK2CLK2386CLK
55PowerVSSGND
56OutputPEREQPEREQNPX
57OutputREADYO#NRDYNPX_PU
58PowerVCCVCC
59InputCKMCKM_PU_JP
60..61PowerVSSGND
62PowerVCCVCC
63PowerVSSGND
64PowerVCCVCC
65N/CNCunused
66PowerVSSGND
67..68N/CNCunused

Copyright © 2003-2004 Ronald van Dijk - All rights reserved