The 74HC00 provides four independent 2-input NAND gates with standard push-pull outputs. The device is designed for operation with a power supply range of 2.0V to 6.0V. If you want to know the difference between 74LS series and 74HC series of electronic circuits, Please click on the following link: https://www.utmel.com/components/74hc00-quadruple-2-input-nand-gates-74ls-series-vs-74hc-series?id=829