engineering sample samples qualification cpu processor prozessor information mhz pictures core frequency chip packaging info ic x86 museum collection amd cyrix harris ibm idt iit intel motorola nec sgs sgs-thomson siemens ST signetics mhs ti texas instruments ulsi hp umc weitek zilog 4004 4040 8008 808x 8085 8088 8086 80188 80186 80286 286 80386 386 i386 Am386 386sx 386dx 486 i486 586 486sx 486dx overdrive 80187 80287 387 487 pentium 586 5x86 386dlc 386slc 486dx2 mmx ppro pentium-pro pro athlon duron z80 sparc alpha dec dirk oppelt
home
Cyrix Cx486 SLC
  Cyrix Cx486SLC/e-V25MP
  Cyrix Cx486SLC/e-33MP
» Cyrix overview
» all 486 chips
 
Cyrix Cx486SLC/e-V25MP
Cyrix Cx486SLC/e-V25MP Top Side
Cx486SLC/e-V25MP
DF7339E
Cyrix Cx486SLC/e-V25MP Back Side
(C)(M)1992 Cyrix USA
This CPU has a 486 instruction set and a 386 pinout. SLC/e stands for low power (SMM: System Management Mode) version of a Cx486SLC.
 
Comment by Paul Hoffman (paulhoffman18[at]gmail.com):
the Cx486SLC/e was packaged in a unique package named `MQUAD` developed and produced by Olin Interconnect Technologies. The package had a black-anodized lid and base that was attached to the leadframe with an adhesive seal. The characteristic sign of the package was the circular pattern in the center of the lid (as in the picture). This was actually a small anodized aluminum disk that was used to seal a vent hole in the package lid (venting was required during the cure of the adhesive seal). The MQUAD package offered superior thermal performance due to its aluminum body - but was relatively short-lived as it was a non-standard package technology.
 
add comment
Core Frequency:25 MHz
Board Frequency:25 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:600,000
Voltage:3.3 V
Introduced:12/1992
Manufactured:week 39/1993
L1 Cache:1 KB
Package Type:MQUAD
QFP-100
top of page
Cyrix Cx486SLC/e-33MP
Cyrix Cx486SLC/e-33MP Top Side
Cx486SLC/e-33MP
FF5403C
Cyrix Cx486SLC/e-33MP Back Side
(c)(m)1992 Cyrix USA
Donated by SOFTWERK. Thanks a lot!  
add comment
Core Frequency:33 MHz
Board Frequency:33 MHz
Data bus (ext.):32 Bit
Address bus:32 Bit
Transistors:600,000
Voltage:3.3 V
Introduced:12/1992
Manufactured:week 40/1993
L1 Cache:1 KB
Package Type:MQUAD
QFP-100
top of page