UMC Green CPU (U5)

The UMC Green CPU was a 486 processor family by United Microelectronics Corporation (UMC) and also a copy of the Intel i486 processor.
Intel forbid UMC to sell 486 CPUs in the United States because of patent infringements.

"Green CPU" U5S

The U5S is similar to the Intel i486 SX. It doesn't feature an integrated FPU.

U5S-SUPER33

CPU die picture:

U5S-SUPER33
Specification Details

Show

Type	Central processing unit / CPU
Family	UMC Green CPU
CPU part number	U5S-SUPER33
Introduction	1994
Manufacturing Date	38th week of 1994
Package	168-pin CPGA
Socket	Socket 2/3
Dimensions	44,5 mm x 44,5 mm
Microarchitecture	U5S
Codename	U5S
Manufacturing process	600 nm
Transistors	1200000
Instruction set	CISC
Frequency	33 MHz
Bus Speed	33 MHz
Multiplier	x1
L1 Cache	8 KB
Data width	32 Bit
Floating Point Unit (FPU)	None / ? capable
Power consumption	?
Vcore	5 Volt

Unlisted models:

U5S: SUPER25, SUPER40
U5D: SUPER25, SUPER33, SUPER40
U486DX2

Sumbit a picture or contribute to the museum!

RETURN TO UMC

RETURN TO THE MAIN MUSEUM PAGE