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SN74F283,PDF(4-Bit Binary Full

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  • 标      签: Adders

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The ´F283 is a full adder that performs the addiTIon of two 4-bit binary words. The sum ( ) outputs are provided for each bit and the resultant carry (C4) output is obtained from the fourth bit. The device features full internal look-ahead across all four bits generaTIng the carry term C4 in typically 5.7 ns. This capability provides the system designer with parTIal look-ahead performance at the economy and reduced package count of a ripple-carry implementaTIon. The adder logic, including the carry, is implemented in its true form. End-around carry can be accomplished without the need for logic or level inversion. The ´F283 can be used with either all-active-high (positive logic) or all-active-low (negative logic) operands.
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