The NTE7483 is a 4−bit binary full adder in a 16−Lead plastic DIP type package that performs the addition of two 4−bit binary numbers. The sum () outputs are provided for each bit and the resultant carry (C4) is obtained from the fourth bit. This device features full internal look−ahead across all four bits generating the carry term in ten nanoseconds (type). 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.