AMD Am486 | |
Enhanced Am486DX2-66SV8B | |
Developer | AMD |
Manufacturer | AMD |
Type | Microprocessors |
Introduction | February, 1992 (announced) April 1993 (launch) |
Production | 1992 |
Architecture | 80486 |
ISA | IA-32 |
Word size | 32 bit 4 octets
8 nibbles |
Process | 700 nm 0.7 μm , 500 nm7.0e-4 mm 0.5 μm , 350 nm5.0e-4 mm 0.35 μm
3.5e-4 mm |
Technology | CMOS |
Clock | 33 Mhz-120 MHz |
Package | CPGA-168, SQFP-208 |
Socket | Socket 1, Socket 2, Socket 3 |
Succession | |
← | → |
Am386 | Am5x86 |
Am486 was a family of 32-bit 4th-generation x86 microprocessors introduced by AMD in 1993. Am486 chips were compatible with Intel's 80486 and offered equivalent performance for cheaper prices.
Contents
History[edit]
Just like AMD's Am386, Am486 was also delayed after expensive and lengthy litigation with Intel. The first models of the Am486 (Am486DX) were finally introduced in April of 1993. The first set of AMD chips were based on Intel's microcode cleanroom implementation. AMD manufactured their first Am486s at their Submicron Development Center (SDC) in Sunnyvale, CA on a 0.7 µm process. Chips were originally restricted to AMD's own foundry as they did not believe their agreement with Intel allowed them to use outside foundry (this became irrelevant later on)[1]. By the end of 1993 AMD revenue of the Am486 reached $250M taking a total of 20% share of the market[2]. By 1995 that share peaked at 40%.
AMD's last models (Am486DX4's) for this family were clocked at up to 120 MHz which gave AMD a significant performance advantage compared to Intel's earliest Pentium chips (which were only clocked at around 60 MHz). The Am486DX4 lower price (compared to Intel's DX4) and socket-comparability ensured strong sale for quite some time after their introduction.
Earliest (700 nm) models operated at 5V, when AMD undergone a process shrink around late 1994/95 they introduced 3.3V models. Initially all models packed 8KB L1$ that used write-through policy. AMD later (See § Larger Cache) introduced various models with other cache set ups including write-back and double the L1$ size which was manufactured on a 350 nm process.
Die[edit]
Am486DX2-66[edit]
Am486DX4-100NV8T[edit]
Members[edit]
Am486DX[edit]
The Am486DX chips are the standard 486 chips with an integrated FPU on-die. First versions introduced had lower clock frequency which matched their external bus speed. Later versions introduced a clock multiplier: DX2 having a multiplier of 2 and DX4 a multiplier of 3.
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,Am486DX Processors | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Bus | Max Mem | Package | |||||||||
Am486DX-25 | April 1993 | 700 nm 0.7 μm 7.0e-4 mm | 25 MHz 0.025 GHz 25,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX-33 | April 1993 | 700 nm 0.7 μm 7.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX-40 | April 1993 | 700 nm 0.7 μm 7.0e-4 mm | 40 MHz 0.04 GHz 40,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-100 | September 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-100V16B | 1995 | 350 nm 0.35 μm 3.5e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-100V8B | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-100V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-50 | June 1993 | 700 nm 0.7 μm 500 nm7.0e-4 mm 0.5 μm 5.0e-4 mm | 50 MHz 0.05 GHz 50,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66 | June 1993 | 700 nm 0.7 μm 500 nm7.0e-4 mm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66NV8T | August 1995 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66V16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66V8B | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-80 | September 1994 | 500 nm 0.5 μm 5.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-80NV8T | August 1995 | 500 nm 0.5 μm 5.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-80V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100 | September 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100NV8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100V16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-120 | 5 June 1995 | 500 nm 0.5 μm 5.0e-4 mm | 120 MHz 0.12 GHz 120,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-120NV8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 120 MHz 0.12 GHz 120,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-120V8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 120 MHz 0.12 GHz 120,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-75 | September 1994 | 500 nm 0.5 μm 5.0e-4 mm | 75 MHz 0.075 GHz 75,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-90 | September 1994 | 500 nm 0.5 μm 5.0e-4 mm | 90 MHz 0.09 GHz 90,000 kHz | 30 MHz 0.03 GHz 30,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-90NV8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 90 MHz 0.09 GHz 90,000 kHz | 30 MHz 0.03 GHz 30,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DXL-40 | October 1993 | 700 nm 0.7 μm 7.0e-4 mm | 40 MHz 0.04 GHz 40,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DXL2-66 | September 1993 | 700 nm 0.7 μm 7.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DXL2-80 | September 1993 | 700 nm 0.7 μm 7.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DXLV-33 | June 1993 | 33 MHz 0.033 GHz 33,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
Count: 30 |
Am486SX[edit]
The Am486SX chips are somewhat a crippled version of the 486DX, models that do not include an integrated FPU. Those chips were sold at cheaper prices because of the smaller die (in the case of omitted FPU on-die) or because the FPU was defective and was thus disabled and sold as SX. Nevertheless they became an attractive option for those looking for just a performance upgrade from their older 386.
Am486SX Processors | ||||||
---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Bus | Max Mem | Package |
Am486SE-25 | 500 nm 0.5 μm 5.0e-4 mm | 25 MHz 0.025 GHz 25,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||
Am486SE-33 | 500 nm 0.5 μm 5.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||
Am486SX-33 | July 1993 | 700 nm 0.7 μm 7.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |
Am486SX-40 | July 1993 | 700 nm 0.7 μm 7.0e-4 mm | 40 MHz 0.04 GHz 40,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |
Am486SX2-50 | February 1994 | 700 nm 0.7 μm 7.0e-4 mm | 50 MHz 0.05 GHz 50,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |
Am486SX2-66 | April 1994 | 700 nm 0.7 μm 7.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |
Am486SXLV-33 | 700 nm 0.7 μm 7.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||
Count: 7 |
Am486 Embedded[edit]
AMD sold a number of processors geared specifically toward the embedded market. Unlike the Am386 embedded chips, the Am486 versions were identical to their non-embedded SX/DX counterparts. They were only different from AMD's own company-support standpoint. Embedded chips were marked with "E" suffix (e.g. "SE"/"DE").
Am486 Embedded Processors | ||||||
---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Bus | Max Mem | Package |
Am486DE2-66V8T | 1996 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |
Am486SE-25 | 500 nm 0.5 μm 5.0e-4 mm | 25 MHz 0.025 GHz 25,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||
Am486SE-33 | 500 nm 0.5 μm 5.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||
Count: 3 |
Larger Cache & Post-lawsuit[edit]
In 1994 AMD introduced a number of newer models which had Write-Back cache policy as well as a few models with twice as large cache (16 KB vs 8 KB). The older models were renamed with a "V8T" suffix; V = 3.3V, 8 = 8 KB cache, T = Write-Through Policy (e.g. Am486DX2-80V8T). The new models with the Write-Back Policy had "B" instead of "T" and the 16 KB versions had "16" instead of "8" (e.g. Am486DX2-66V16B).
Following the conclusion of an 8-year legal battle with Intel, the results was AMD was allowed to copy and distribute Am286s and Am386s chips. Unfortunately it was also concluded that AMD did not have the copyright for Intel's 80486 microcode. AMD was forced to destroy the older models containing Intel's in-circuit emulation (ICE) microcode. The "ICE microcode" was referred to the control program which was stored in the 386's/486's programmable logic array in the processor. All newer AMD models were marked with an "N" (for "No ICE"). For example the previous model Am486DX4-100V8T became Am486DX4-100NV8T.
Newer Processors | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Bus | Max Mem | ||||||||||
Am486DE2-66V8T | 1996 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-100V16B | 1995 | 350 nm 0.35 μm 3.5e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-100V8B | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-100V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66NV8T | August 1995 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66V16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66V8B | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-80NV8T | August 1995 | 500 nm 0.5 μm 5.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-80SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-80V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100NV8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100SV16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100V16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100V8T | 1994 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-120NV8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 120 MHz 0.12 GHz 120,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-120SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 120 MHz 0.12 GHz 120,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-120V8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 120 MHz 0.12 GHz 120,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-75SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 75 MHz 0.075 GHz 75,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-90NV8T | 1995 | 500 nm 0.5 μm 5.0e-4 mm | 90 MHz 0.09 GHz 90,000 kHz | 30 MHz 0.03 GHz 30,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Count: 22 |
Enhanced Am486[edit]
- See also: Am5x86
In 1996 AMD introduced a number of chips they branded as "Enhanced Am486". Those processors had a number of new power saving features (e.g. SMM and Stop Clock Mode). The additional features found on the enhanced Am486 get disabled if the processor is used in a socket that does not support them, making them backwards-compatible. The new Enhanced Am486s were marked with "S" (for SMM), for example Am486DX2-66SV8B. Note that some later models did not include the "S" even though they were enhanced models.
Enhanced Processors | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Bus | Max Mem | Package | |||||||||
Am486DX2-66SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-66V16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX2-80SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 80 MHz 0.08 GHz 80,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100SV16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-100V16B | March 1997 | 350 nm 0.35 μm 3.5e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-120SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 120 MHz 0.12 GHz 120,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Am486DX4-75SV8B | March 1996 | 500 nm 0.5 μm 5.0e-4 mm | 75 MHz 0.075 GHz 75,000 kHz | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||
Count: 8 |
Documents[edit]
Datasheets[edit]
- Am486DX (May, 1993), Publication #17852, For -40/-33
- AMD Am486DX4 NV8T (July, 1995), Publication #19160, For 100/120
- AMD Am486DX2 NV8T (August, 1995), Publication #19200, For: 66/80
- AMD Enhanced Am486 (March, 1996), Publication #19225, For: DX4 -75/-100/-120 / DX2 -66/-80
- AMD Enhanced Am486 (March, 1997), Publication #20736, For: DX4 -100 / DX2 -66
- Am486DE (April, 1996), Publication #20037, For: 66
Manuals[edit]
- Am486 DX/DX2 Microprocessor Hardware Reference Manual (1993)
- Am486 Microprocessor Software User's Manual (1994)
Thermal & Clock[edit]
- Clock Gating Recommendations; Publication #19195 Revision C/0; August 1995
- CPU Thermal Management; Publication #18448 Revision D/0; August 1995.
- Low Voltage Power Supply Circuits; Publication #19197 Revision D/0; August 1995.
- Phase Lock Loop (PLL) Clock Control; Publication #18495 Revision D/0; August 1995.
Others[edit]
References[edit]
designer | AMD + |
first announced | February 1992 + |
first launched | April 1993 + |
full page name | amd/am486 + |
instance of | microprocessor family + |
instruction set architecture | IA-32 + |
main designer | AMD + |
manufacturer | AMD + |
name | AMD Am486 + |
package | CPGA-168 + and SQFP-208 + |
process | 700 nm (0.7 μm, 7.0e-4 mm) +, 500 nm (0.5 μm, 5.0e-4 mm) + and 350 nm (0.35 μm, 3.5e-4 mm) + |
socket | Socket 1 +, Socket 2 + and Socket 3 + |
technology | CMOS + |
word size | 32 bit (4 octets, 8 nibbles) + |