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Intel 387 Processors
 

80387DX/SX
Processor Type Math Coprocessor
Architecture
  • High Performance 80-Bit Internal Architecture
  • Implements ANSI/IEEE Standard 754/1985 for Binary Floating Point Arithmetic
    		•
    Data Types Expands 80386 Data Types to include:
  • 32-, 64- and 80-Bit Floating Point
  • 32- and 64-Bit Integers
  • 18-Digit BCD Operations
    		•
    Exceptions Built-In Exception Handling
    Register Stack 8 * 80-bit Numeric Registers, Usable as Individually Addressable General Registers or as a Register Stack
    Operating Modes Operates Independently of Real, Protected and Virtual-8086 Modes of 80386 Microprocessor
    Instruction Set Directly Extends Intel386™ CPU Instruction Set to Include
  • Trigonometric
  • Logarithmic
  • Exponential
  • Arithmetic Operation

    • Full-Range Transcendental Operations for:
  • Sine
  • Cosine
  • Tangent
  • Arctangent
  • Logarithm
    		•
    Compatibility
  • Object Code Compatible with 8087 and 80287
    		•

    A80387
    Package
    Vcc
    TCASE    		 68—pin ceramic PGA
    5V ± 5%
    0°C - +85°C
    Core Speed 16MHz A80387-16 SX029
    Core Speed 16MHz A80387-16 SX104
    Core Speed 16MHz A80387-16B SX009
    Core Speed 20MHz A80387-20 SX030
    Core Speed 20MHz A80387-20 SX105
    Core Speed 20MHz A80387-20 SX105 ("intel" logo)
    Core Speed 20MHz A80387-20B SX024
    Core Speed 25MHz A80387-25 SX049
    Core Speed 25MHz A80387-25 SX106

    A80387DX
    Package
    Vcc
    TCASE    		 68—pin ceramic PGA
    5V ± 5%
    0°C - +85°C
    Core Speed 16MHz A80387DX SZ677
    Core Speed 16MHz A80387DX-16
    Core Speed 16MHz A80387DX-16 SC21
    Core Speed 16MHz A80387DX-16 SX029
    Core Speed 16MHz
    A80387DX-16
    SX104
    Core Speed 20MHz
    A80387DX-20
    Core Speed 20MHz A80387DX-20 SC19
    Core Speed 20MHz A80387DX-20 SC21
    Core Speed 20MHz A80387DX-20 SX066
    Core Speed 20MHz A80387DX-20 SX105
    Core Speed 25MHz A80387DX-25
    Core Speed 25MHz A80387DX-25 SX086
    Core Speed 25MHz A80387DX-25 SX106
    Core Speed 16—33MHz A80387DX16-33 D0
    Core Speed 33MHz
    A80387DX-33
    Core Speed 33MHz A80387DX-33 SC21
    Core Speed 33MHz A80387DX-33 SX232

    N80387SX
    Package
    Vcc
    TCASE    		 68—pin PLCC
    5V ± 10%
    0°C - +100°C
    Core Speed 16MHz N80387SX-16
    Core Speed 16MHz N80387SX-16 SX237 (no logo)
    Core Speed 16MHz N80387SX-16 SX237 ("intel" and "i387sx" logo)
    Core Speed 20MHz N80387SX-20 SZ369 (no logo)
    Core Speed 20MHz N80387SX-20 SZ369 ("intel" and "i387sx" logo)
    Core Speed 16—25MHz
    N80387SX
    16-25 MHz
    A1
    Core Speed 25MHz N80387SX-25
    Core Speed 25MHz N80387SX-25 SZ507
    Core Speed 33MHz N80387SX-33
     

    N80387SL
    Package
    Vcc
    TCASE    		 68—pin PLCC
    5V ± 10%
    0°C - +100°C
    Core Speed Unknown N80387SL
    Core Speed 16—25MHz
    N80387SL
    16-25 MHz