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File name:4581.pdf
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Original Chassis:CMOS 4xxx
Descr:4-Bit Arithmetic Logic Unit
Group:Electronics > Components > Integrated circuits >
Uploaded:2005-06-27 07:32:07
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4581.pdfMOTOROLA SEMICONDUCTOR TECHNICAL DATA MC14581B 4-Bit Arithmetic Logic Unit The MC14581B is a CMOS 4­bit ALU capable of providing 16 functions of two Boolean variables and 16 binary arithmetic operations on two 14­bit words. The level of the mode control input determines whether the output function is logic or arithmetic. The desired logic function is selected by applying the appropriate binary word to the select inputs (S0 thru S3) with the mode control input high, while the desired arithmetic operation is selected by applying a low voltage to the mode control input, the required level to carry in, and the appropriate word to the select inputs. The word inputs and function outputs can be operated with either active high or active low data. Carry propagate (P) and carry generate (G) outputs are provided to allow a full look­ahead carry scheme for fast simultaneous carry generation for the four bits in the package. Fast arithmetic operations on long words are obtainable by using the MC

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