Intel Celebrates the 50th Anniversary of the Microprocessor
50 years ago Intel engineers simplified a calculator design and created the Intel 4004, the world’s first single-chip microprocessor.
The Intel 4004 microprocessor.Intel
The Nippon Calculation Machine Corporation Busicom 141-PF desktop calculator was the device that prompted Intel's creation of the Intel 4004, the world's first commercial microprocessor.
The Intel 4004 revved its paltry 2,300 transistors at 750 kHz, but the important thing was that it was start of the programmable microprocessor industry.
While the value of microprocessors is self-evident today, in 1971 engineers needed to be reminded of the potential uses of such a chip. So Intel advertised the 4004's capabilities, in an early hint of future "Intel Inside" consumer advertising.
Intel engineer Stan Mazor was on the team that designed the Intel 4004 microprocessor in 1971.
Intel engineer Ted Hoff was on the team that designed the Intel 4004 microprocessor in 1971.
Intel engineer Federico Faddin was on the team that designed the Intel 4004 microprocessor in 1971.
The Intel 8008 was the 8-bit follow-on to the 4-bit 4004, debuting in 1972. It saw use in Seiko calculators.
Intel's second 8-bit microprocessor, the 8080, debuted in 1974 with a clock speed of 2 MHz. It laid the foundation for the 8088 and 8086, along with the subsequent x86 product families.
The 16-bit Intel 8086 arrived in 1978 and provided the processing power for IBM's PC and subsequent PC clones. The original IBM PC used the 8088, which was an 8086 processor with an 8-bit data bus, permitting use of a cheaper chipset.
The 16-bit Intel 8086 incorporated 29,000 transistors and ran a 5 MHz, marking dramatic improvements over earlier models.
Intel's x86 architecture grew through multiple generations, culminating in the 80486 in 1989. It was the first x86 chip to pack more than a million transistors and it incorporated a built-in floating-point processor that had been a separate part for the preceding 80386 generation. Trademark issues lead to this being branded the i486, and it was followed by chips using the Pentium nomenclature.
As Intel wrestled with competitors using its x86 designations for their chips, the company sought to establish its brand with consumers with the goal of encouraging them to demand Intel chips from PC manufacturers. Where previous tech marketing had focused heavily on technical specifications designed to appeal to industry insiders, Intel Inside was designed to be accessible to laymen. It loaded a simple logo with enough meaning to give non-techies an easy way to understand that their devices contained quality components provided by the company that defined the state of the art.
As Intel wrestled with competitors using its x86 designations for their chips, the company sought to establish its brand with consumers with the goal of encouraging them to demand Intel chips from PC manufacturers. Where previous tech marketing had focused heavily on technical specifications designed to appeal to industry insiders, Intel Inside was designed to be accessible to laymen. It loaded a simple logo with enough meaning to give non-techies an easy way to understand that their devices contained quality components provided by the company that defined the state of the art.
While pioneers like Fairchild Semiconductor were among the very earliest Silicon Valley companies, it was Intel, founded by Fairchild employees, that launched the California microprocessor industry to today’s state of utter ubiquity. This started 50 years ago with the release of the Intel 4004, which is regarded as the world’s first commercially available single-chip microprocessor.
These qualifiers are apparently necessary because of some easily overlooked and forgotten devices such as a microprocessor that was used in early F-14 fighter plane prototypes and an ungainly multi-chip processor system. It is commercial products that drive industries, and that was the case for the Intel 4004, although this groundbreaking chip got off to a slow start.
Intel sort of backed into this market, developing the chip at the request of Japanese calculator company Nippon Calculating Machine Corporation for its new Busicom 141-PF printing calculator. In 1969, that company sought a cumbersome 12-chip solution for its desktop calculator. These chips would have their logic programming built into their physical architecture.
Intel engineer Ted Hoff proposed a four-chip alternative, including at its core the programmable 4004 microprocessor. Nippon Calculation Machine Corp. was dissatisfied with this result, so in 1971 Intel refunded the company’s $60,000 to reclaim rights to the 4004 design and offered it as a commercial product to other customers. Even then, it took time for the industry to comprehend the potential of programmable microprocessors.
“People were locked into the concept that a computer was a precious, multi-million-dollar piece of equipment,” recalled Hoff. “With this product, we changed people's perception of computers and the direction that the computing industry would go. We democratized the computer.”
“The 4004 was so revolutionary that it took about five years for Intel to educate engineers about how to build new products based on microprocessors,” said 4004 co-inventor Stan Mazor (along with Hoff and Federico Faggin). “Intel was ultimately very successful in this endeavor, and the rest is history.”
This wasn’t Intel’s first example of backing into a new invention. The company created the first integrated circuit somewhat accidentally, according to Intel founder Robert Noyce. “I say that the integrated circuit came out of my own laziness,” he joked.
In those early days, rather than carving out circuits from silicon wafers, semiconductor companies cut out individual transistors, Noyce explained. “We took those transistors that were all nicely arranged on a piece of silicon and cut them into tiny pieces. So then of course we’d ship them to a customer and they’d put them all right back together again. Why not just cut out all of that middle ground? Just put ‘em together while they’re still on the silicon. So that’s what we did.”
That original 4004 chip featured 2,300 transistors packaged in a 16-pin dual in-line package and ran at 750 kHz. It was fabricated on 2-inch silicon wafers using 10-micron (10,000-nanometer) lithography.
That compares to Intel’s latest technology, the 12th-Generation Intel Core processor family, which incorporates billions of transistors on a 1,700-pin socket package running at 5.2 GHz. It is made on 12-inch silicon wafers using 7-nanometer circuits.
And Nippon Calculation Machine Corp.? That company went out of business in 1974.
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