The 'ACT283 high-speed 4-bit binary full adder with internal carry lookahead accepts two 4-bit binary words (A₀-A₃, B₀-B₃) and a Carry input (C₀). It generates the binary Sum outputs (S₀-S₃) and the Carry output (C₄) from the most significant bit. The 'ACT283 will operate with either active HIGH or active LOW operands (positive or negative logic).