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The 74181 is a 7400 series medium-scale integration (MSI) TTL integrated circuit, containing the equivalent of 75 logic gates [3] and most commonly packaged as a 24-pin DIP. The 4-bit wide ALU can perform all the traditional add / subtract / decrement operations with or without carry, as well as AND / NAND, OR / NOR, XOR , and shift .
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The 74181, however notable it is for its historic uses, is effectively obsolete. It will never again become cost-competitive with contemporary modern chips. Yes, it would be useful and interesting for the article to explore the exact history of when the 74181 faded from being the top of the heap, but the lack of such an exploration does not ...
In computing, an arithmetic logic unit (ALU) is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. [1] [2] This is in contrast to a floating-point unit (FPU), which operates on floating point numbers.
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