4-Bit Binary Full Adder with Fast Carry

The ’AC283 and ’ACT283 4-bit binary

adders with fast carry that utilize Advanced CMOS Logic technology. These devices

add two 4-bit binary numbers and generate a carryout bit if the sum exceeds 15.

Because of the symmetry of the add

function, this device can be used with either all active-HIGH operands (positive

logic) or with all active-LOW operands (negative logic). When using positive logic,

the carry-in input must be tied LOW if there is no carry-in.