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AMD 386 SX
  AMD Am386SX-20
  AMD Am386SX/SXL-25
  AMD Am386SX/SXL-33
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The AMD Am386SX Processor
In 1991 AMD introduced advanced versions of the 386SX processor - not a second source production of the Intel chip, but a reverse engineered pin compatible version. In fact, it was AMD's entry in the x86 market other than as a second source for Intel. AMD 386SX processors were available at faster clock speeds at the time they were introduced and still cheaper than the Intel 386SX.
Produced in 0.8 m technology and using a static core their clock speed could be dropped down to 0 MHz, consuming just some mWatts. Power consumption was up to 35% lower than with Intel's design and even lower than the 386SL's, making the AMD 386SX the ideal chip for both desktop and mobile computers. The SXL versions featured advanced power management functions and used even less power.
 
References: Am386SX/SXL/SXLV Datasheet
AMD Am386SX-20
AMD Am386SX-20 Top Side
Am386SX-20
NG80386SX-20
A1 129A587
(m) AMD
AMD Am386SX-20 Back Side
5902AH
9120GP
MALAYSIA
 
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Core Frequency:20 MHz
Board Frequency:20 MHz
Data bus (ext.):16 Bit
Address bus:24 Bit
Transistors:275,000
Circuit Size:0.80
Voltage:5 V
Manufactured:week 20/1991
Made in:Malaysia
Package Type:Plastic
PQFP-100
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AMD Am386SX/SXL-25
AMD Am386SX/SXL-25 Top Side
Am386SX/SXL-25
NG386SXL-25
NG386SX-25
B 1386VE7
(m) AMD
AMD Am386SX/SXL-25 Back Side
5902ER
9137GP
MALAYSIA
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Core Frequency:25 MHz
Board Frequency:25 MHz
Data bus (ext.):16 Bit
Address bus:24 Bit
Transistors:275,000
Circuit Size:0.80
Voltage:5 V
Manufactured:week 37/1991
Made in:Malaysia
Package Type:Plastic
PQFP-100
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AMD Am386SX/SXL-33
AMD Am386SX/SXL-33 Top Side
Am386SX/SXL-33
NG386SXL-33
NG386SX-33
C224A3J5
(m) AMD
AMD Am386SX/SXL-33 Back Side
5004A
92230P
MALAYSIA
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Core Frequency:33 MHz
Board Frequency:33 MHz
Data bus (ext.):16 Bit
Address bus:24 Bit
Transistors:275,000
Circuit Size:0.80
Voltage:5 V
Manufactured:week 24/1992
Made in:Malaysia
Package Type:Plastic
PQFP-100
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