Am486 - AMD

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 7.0e-4 mm , 500 nm 0.5 μm 5.0e-4 mm , 350 nm 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, but offered very equivalent performance for cheaper prices.

History

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

Am486DX2-66

Am486DX4-100NV8T

Members

Am486DX

Am486DX2-66 from 1994.

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.

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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 7.0e-4 mm 500 nm 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 7.0e-4 mm 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
Am486DX2-66NV8T	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

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

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

Am486DX2-66NV8T "No ICE" chip.

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

See also: Am5x86

Am486DX4-120SV8B Enhanced Am486 @ 120 MHz.

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

Datasheets

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

Thermal & Clock

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

Am486 Microprocessor PCI Customer Development Platform (December 18, 1998)

References

↑ DataQuest Monday. (1993). DataQuest.
↑ Fletcher, Andrew. E. Profile of the Worldwide Semiconductor Industry - Market Prospects to 1997: Market Prospects to 1997. (2013). Elsevier. ISBN 9781483284859.

[1] DataQuest Monday. (1993). DataQuest.

[book1-2] Fletcher, Andrew. E. Profile of the Worldwide Semiconductor Industry - Market Prospects to 1997: Market Prospects to 1997. (2013). Elsevier. ISBN 9781483284859.

[1

[2

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) +

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