74HC86D,653 Nexperia Quad 2-Input XOR Gate IC (SOIC-14)

The XOR gate is the building block behind bit comparison, parity checking, and the add/subtract logic in simple arithmetic circuits, and this chip packs four independent 2-input XOR gates into a single SOIC-14 package. As a genuine Nexperia part, it comes with the branded manufacturer's documented switching characteristics rather than the looser tolerances a generic equivalent might carry, which matters for a design that's timing-sensitive. The surface-mount footprint suits a compact PCB layout where a through-hole DIP package would eat up board space the design doesn't have to spare.