INTELS 8 BIT PROCESSORS

8008:-

• Introduced April 1, 1972
• Clock rate 200 kHz (8008–1: 800 kHz)
• 0.05 MIPS
• Bus Width 8 bits (multiplexed address/data due to limited pins)
• Enhancement loadPMOS logic
• Number of Transistors 3,500 at 10 µm
• Addressable memory 16 KB
• Typical in early 8 bit microcomputers, dumb terminals, general calculators, bottling machines
• Developed in tandem with 4004.

8080:-

• Introduced April 1, 1974
• Clock rate 2 MHz
• 0.64 MIPS
• Bus Width 8 bits data, 16 bits address
• Enhancement load NMOS logic
• Number of Transistors 6,000
• Assembly language downwards compatible with 8008.
• Addressable memory 64 KB
• Up to 10X the performance of the 8008.

8085:-

• Introduced March 1976
• Clock rate 2 MHz^]
• 0.37 MIPS
• Bus Width 8 bits data, 16 bits address
• Depletion loadNMOS logic.
• Number of Transistors 6,500 at 3um