Half adder

Half adder 

Half adder:

·         Half adder has two inputs and two outputs. It can add 2 bits at a time and produce 2-bit data(SUM and CARRY). It circuit consists of an EX-OR gate and AND gate.

·         The outputs of EX-OR gate is called the SUM(S), while the output of AND gate is known as CARRY(C).

·         This circuit is called half adder because it cannot accept a CARRY from the previous additions. Hence half adder circuit can be used for binary addition of lower most bit only.