Intel 4040

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Intel D4040 processor
Production:	1974 to 1981
Producer:	Intel
Processor clock:	500 kHz to 740 kHz
Manufacturing :	10 µm, PMOS
Instruction set :	Intel 4 bit
Base:	24-pin DIP

The 4040 is a 4- bit - microprocessor from Intel and is the successor of 4004 .

It was produced from November 1974 to 1981. The processor is compatible with its predecessor. The instruction set was expanded to 60 instructions, the program memory doubled to 8 kB and the number of 4-bit registers increased from 16 to 24. The stack for calling subroutines has been expanded to seven entries. As a further innovation, interrupts are possible.

Technical specifications

Intel 4040 : Function Block Diagram

• Technology: PMOS
• Structure width : 10 µm
• Number of transistors: 3000
• Clock frequency: 500 kHz - 740 kHz
• Cycles per instruction: 8
• Number of commands: 60
• Design: 24 pin dual in-line package (DIP)

Individual evidence

1. ↑ http://www.cpushack.net/life-cycle-of-cpu.html

Web links

Commons : Intel 4040  - collection of pictures, videos and audio files

• Intel 4040 - Collectors website with many pictures - www.CPU-Galaxy.at