The Intel 4004
Manufacturer: intel
Part Number: (C/D/P)4004
Process Node: 10um
Transistors: 2,300
Clock rate: 740 kHz
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The Intel 4004 is widely known as the world’s first commercially available microprocessor, and was released 50 years ago to the day (November 15th, 1971). The 4004’s design was started over a year prior to its launch in April of 1970, led by Federico Faggin. His initials, “F. F.” are printed on every 4004 silicon.
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I unfortunately don’t have my own chip, but I have the next best thing; a 25th anniversary clock with a genuine 4004 silicon chip mounted inside. While still quite expensive, they are cheaper than trying to buy a 4004 in a ceramic, or even plastic package. I also don’t have to destroy an expensive part to be able to look at the silicon, so it's really a win-win 😁.
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Initially, the 4004 was offered in a white ceramic DIP-16 package. In order to do anything useful, it needed to be paired with additional support chips, including the 4001 (ROM), 4002 (RAM), shift registers (4003), and a few others. At a minimum, a single 4001 was required. The 4004 was first used in (and apparently designed for) the Busicom calculator, 141-PF
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If you are interested in learning more about the 4004, the Wikipedia page for it is a great place to start (and also where I found most of this information).
Here's a link to a very descriptive block diagram:
https://www.intel.com/content/dam/www...
And this is the complete schematic for the chip:
https://deramp.com/downloads/mfe_arch...
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