The Intel 4004

General

General Information	The 4004 is the world's first microprocessor. The 4004 was created at Intel with Ted Hoff and Federico Faggin as the lead designers. The 4004 provided a new tool to the world. Up to that time and semiconductors and IC's were built for a specific purpose. The 4004 was the first semiconductor device that provided, at the chip level, the functions of a computer. The 4004 contains the two basic architectural building blocks that are still found in today's microcomputers: the arithmetic and logic unit and the control unit. The Intel 4004 ran at a clock speed of 108 kHz and contained 2300 transistors. By the time it was in production the clock speed was increased to 500kHz and later to 740kHz. It processed data in 4 bits, but its instructions were 8 bits long. The 4004 addressed up to 1 Kb of program memory and up to 4 Kb of data memory (as separate entities). It had sixteen 4-bit (or eight 8-bit) general purpose registers, and an instruction set containing 45 instructions. The 4004 family is also referred to as the MCS-4.
Production	3 Qtr, 1971
Designers	Ted Hoff, Federico Faggin, Stan Mazor, Masatoshi Shima

Type

Data Word

Address Space

Clock

Instruct- ions

Assists

Reg's GP

Reg's Math

Reg's Index

IO Ports

Stack

Interrupts

Memory

4-bit

1Kb of program,

4Kb of data

500Khz,

740kHz,

2 Phase

BCD

16 4-bit

4x12

Chip Name	Package	On-Chip Identification	Picture	General Comments
C4004	White/Gold CerDIP, 16-pin (visible traces)	C4004		Gray trace chips were produced from 1971-76. This chip was assembled in Malaysia.
C4004	White/Gold CerDIP, 16-pin	C4004		I have chips assembled in the US and Hong Kong
D4004	Gray Ceramic, 16-pin DIP	D4004		Assembled in Malaysia
P4004	Black Resin, 16-pin DIP	P4004		Assembled in the Philippines
P4004	Gray Resin, 16-pin DIP	P4004		Gray resin chips were produced from 1971-73


4004 chip Photograph	Federico Faggin's Initial on the chip	Intel logo on chip with copyright date	4004 Identifier on chip

Related Chips	Intel 4040
Second Sources	National Semiconductor
Support Chips	Initial Chips: 4001 (ROM), 4002-1 (RAM), 4002-2 (RAM), 4003 (Shift) Introduced Later: 4008 (EPROM Interface), 4009 (EPROM Interface)

Federico Faggin's 4004 Site An interested site describing the Intel 4004 development