What is oc gate

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In actual use, sometimes it is necessary to connect the output ends of two or more NAND gates to the same wire, and transmit the data (status) on these NAND gates through the same wire. Therefore, a new NAND gate circuit is needed to realize the line AND logic. This gate circuit is the collector open circuit NAND gate circuit, referred to as OC gate (open collector). See the figure for OC gate circuit and logic symbol What is OC gate The characteristic of this circuit is that the collector of output tube T5 is suspended, and an external load resistor RP and power supply Ec are required when using it. The main uses of OC gates are as follows: (1) Application of OC gate circuits - realizing AND/NOT logic The circuit using n OC gates to realize AND/NOT logic is shown in the figure What is an OC gate Because when any gate input is all 1, its output is zero, and the output ends of n gates are connected together (line AND), the output Y=0, that is, Y=A1B1+A2B2+……+AnBn, which is the AND/NOT logic function. (2) Application of OC gate circuits - used for level conversion The interface part of the digital system often needs to perform the level conversion shown, which can be achieved with OC gates. What is an OC gate The circuit shown is a circuit that uses OC gates to convert the output high level to 10V. (3) Application of OC gate circuit - used as driver