Connected to 1 is input 1 connected to 0 is input 0 Grounded is input 0 suspended is input 1 There is no difference in logical input.
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In practical applications, the pin should not be suspended, and should be pulled up or grounded as needed to enhance circuit stability. And not gate is a combination of and gate and not gate, first performing and operation, then performing non-operation. The and input requires two, and if the input is represented by 0 and 1, then the result of the and operation is the product of these two numbers. If 1 and 1 (with signals at both ends), the output is 0; 1 and 0, the output is 1; 0 and 0, the output is 1. The result of an and not gate is the result of an and operation on two input signals, and then a non-operation on the result of the and operation. To put it simply, with non and non, is first and then non. A basic logic circuit in electrotechnics that is superimposed on a gate and a non-gate, having two inputs and one output. The logic gate in CMOS circuit has no gate, and gate, and gate, or not gate, or gate, XOR gate, XOR gate, and not gate, Schmidt trigger gate, buffer, driver and not gate is when the input has 1 or more of the low level, the output is high; Only when all inputs are high, the output is low and non-gate chip: 74ls series: 74ls00, 74LS20, CMOS series: CD4011