74HC00D,653 NEXPERIA Quad 2-Input NAND Gate IC (SOIC-14)

A NAND gate holds a special place in digital logic, combining enough of them in different configurations can reproduce the function of AND, OR, NOT, or any other basic gate, which is why it's often the first chip reached for when building custom combinational logic from scratch. This genuine Nexperia 74HC00 packs four of these universal gates onto a single SOIC-14 chip, ready for a finished surface-mount PCB design.