Before revision: Circuit operation upright=1.8|The combinational logic circuitry of the 74181 integrated circuit, an early four-bit ALU An ALU is a combinational logic circuit, meaning that its outputs will change asynchronously in response to input changes.
After revision: , with logic gatesCircuit operation upright=1.8|The combinational logic circuitry of the 74181 integrated circuit, an early four-bit ALU An ALU is a combinational logic circuit, meaning that its outputs will change asynchronously in response to input changes.