Application-Specific Integrated Circuits by Michael John Sebastian Smith

By Michael John Sebastian Smith

Entire e-book on ASICs describes the most recent tools in VLSI-systems layout, ASIC layout, utilizing advertisement instruments and pre-designed phone libraries. Covers either semicustom and programmable ASIC kinds. DLC: Application-specific built-in circuits.

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For a programmable ASIC the FPGA company supplies you with a library of logic cells in the form of a design kit , you normally do not have a choice, and the cost is usually a few thousand dollars. For MGAs and CBICs you have three choices: the ASIC vendor (the company that will build your ASIC) will supply a cell library, or you can buy a cell library from a third-party library vendor , or you can build your own cell library. The first choice, using an ASIC-vendor library , requires you to use a set of design tools approved by the ASIC vendor to enter and simulate your design.

If each die is worth $100, how much is a 20-wafer boat worth? If a factory is processing 10 of these boats in different furnaces when the power is interrupted and those wafers have to be scrapped, how much money is lost? ● b. The size of silicon factories (fabs or foundries) is measured in wafer starts per week. If a factory is capable of 5000 12-inch wafer starts per week, with an average die of 500 mil on a side that sells for $20 and 90 percent yield, what is the value in dollars/year of the factory production?

15 you can see that the successive introduction of new process technologies every 2 years drives the price per gate down at a rate close to 30 percent per year. The cost figures that we have used in this section are very approximate and can vary widely (this means they may be off by a factor of 2 but probably are correct within a factor of 10). ASIC companies do use spreadsheet models like these to calculate their costs. 15 Example price per gate figures. Having decided if, and then which, ASIC technology is appropriate, you need to choose the appropriate cell library.

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