74ls02 is a 2 input or not gate, but a chip has four or not gates, so it is called 2 input 4 or not gate similar to this name:
1, 74ls08 2 Input four and door;
2, 74ls09 2 Input four and door;
3, 74ls10 3 Input three and not gate;
4, 74ls11 3 Enter the three and door;
5, 74ls12 3 Enter three and not gates.
74ls02 is a 2 input or not gate, but a chip has four or not gates, so it is called 2 input 4 or not gate similar to this name:
1, 74ls08 2 Input four and door;
2, 74ls09 2 Input four and door;
3, 74ls10 3 Input three and not gate;
4, 74ls11 3 Enter the three and door;
5, 74ls12 3 Enter three and not gates. Non-gate, also known as inverter, is an important basic unit of logic circuit, there are two ends of input and output, and the circle at the output end represents the meaning of inverting.