AMD Am386

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KL AMD 386DX.jpg
AMD Am386DX / DXL in a PGA housing
Production: since 1991
Producer: AMD
Processor clock: 16 MHz to 40 MHz
FSB cycle: 16 MHz to 40 MHz
L1 cache size: 0 kB
Instruction set : x86

The Am386 processor family was a copy of the Intel i386 and thus AMD's version of the 80386 generation. In contrast to the later Am486 , the Am386 is still a complete copy of the i386 and does not contain any proprietary developments from AMD.

It was available in various versions and the highest clocked 80386 is among these CPUs. The clock rates were 16 to 40 MHz and AMD was able to surpass Intel in the clock rate for the first time. Sometimes the CPUs don't even need a heat sink. Because of its low price, this Am386DX-40 became a very common and popular CPU in the early 1990s.

Litigation with Intel

The appearance of the CPU in 1991 (five years after the Intel i386) was preceded by a longstanding legal dispute in which Intel wanted to prevent AMD from shipping the Am386. The background was a manufacturing agreement between Intel and AMD - which came about under pressure from IBM and also existed with other semiconductor manufacturers - which allowed AMD to manufacture and sell copies of the Intel CPUs under its own name. With the introduction of the 80386 generation, Intel refused to provide AMD with the necessary production documents, stating that the agreement was only valid until 80286 and took legal action against the former partner. Finally, AMD won the lawsuit and was allowed to ship the Am386.

architecture

Am386DX

  • Max. addressable memory: 4 GB
  • Processing width: 32 bits
  • Data bus: 32 bit
  • Address bus: 32 bit

Am386SX

  • Max. addressable memory: 16 MB
  • Processing width: 32 bits
  • Data bus: 16 bit
  • Address bus: 24 bit

The external 16-bit data bus enables the use of cheap 80286 chipsets.

Model data

Am386DX / DXL / DXLV

Am386DX-40
That of an AMD Am386 DX / DXL-40

The Am386DX is completely the same as the Intel i386DX .

Technical specifications

  • Am386DXL: Low-power variant with standby mode and static clock / static core
  • Am386DXLV: Low-voltage variant with additional system management mode , otherwise like Am386DXL
  • L1 cache: does not exist
  • L2 cache: depends on the mainboard
  • Design: PQFP with 132 pins or PGA with 132 pins
  • Operating voltage (VCore):
    • Am386DX and Am386DXL: 5V
    • Am386DXLV: 3.3V to 4.5V
  • Publication date:
    • Am386DX and Am386DXL: March 1991
    • Am386DXLV: October 1991
  • Manufacturing technology: 1.5 µm
  • Die size : 104 mm² with 275,000 transistors (weight: 16g)
  • Clock rates:
    • 16 MHz (Am386DX)
    • 20 MHz (Am386DX and Am386DXL)
    • 25 MHz (Am386DX, Am386DXL and Am386DXLV)
    • 33 MHz (Am386DX, Am386DXL and Am386DXLV)
    • 40 MHz (Am386DX and Am386DXL)

Am386SX / SXL / SXLV

Am386SX / SXL

The Am386SX is completely the same as the Intel i386SX .

Technical specifications

  • Am386SXL: low-power variant with standby mode and static clock / static core (maximum clock frequency up to 0 MHz)
  • Am386SXLV: Low-voltage variant with additional system management mode , otherwise like Am386SXL
  • L1 cache: does not exist
  • L2 cache: nonexistent
  • Design: PQFP with 100 pins
  • Operating voltage (VCore):
    • Am386SX and Am386SXL: 5V
    • Am386SXLV: 3.3V to 5V
  • Publication date:
    • Am386SX and Am386SXL: July 1991
    • Am386SXLV: October 1991
  • Manufacturing technology: 0.8 µm
  • Die size : 104 mm² with 275,000 transistors
  • Clock rates:
    • 16 MHz (Am386SX)
    • 20 MHz (Am386SX, Am386SXL and Am386SXLV)
    • 25 MHz (Am386SX, Am386SXL and Am386SXLV)
    • 33 MHz (Am386SX, Am386SXL and Am386SXLV)
    • 40 MHz (Am386SX and Am386SXL)

Am386DE

Am386DE

Embedded version of the Am386DX. This CPU belongs to the AMD Embedded E86 family.

Technical specifications

  • L1 cache: does not exist
  • L2 cache: nonexistent
  • Design: PQFP with 132 pins and PGA
  • Operating voltage (VCore):?
  • Release DATE: 1995
  • Manufacturing engineering: ?
  • The size :?
  • Clock rates: 25 and 33 MHz

Am386SE

Embedded version of the Am386SX. This CPU belongs to the AMD Embedded E86 family.

Technical specifications

  • L1 cache: does not exist
  • L2 cache: nonexistent
  • Design: PQFP with 100 pins
  • Operating voltage (VCore):?
  • Release DATE: 1995
  • Manufacturing engineering: ?
  • The size :?
  • Clock rates: 25 and 33 MHz

See also

Web links

Commons : AMD Am386  - collection of pictures, videos and audio files