SN74F283

具有快速进位的 4 位二进制全加器

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.

The SN54F283 is characterized for operation over the full military temperature range of -55°C to 125°C. The is characterized for operation from 0°C to 70°C.

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Full-Carry Look-Ahead Across the Four Bits

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Systems Achieve Partial Look-Ahead Performance With the Economy of Ripple Carry

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Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs