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The second will require only one IC, but only two gates can be made. Logic level gates like CD and flip-flops play a vital role in digital electronics. The first is to use a NOR gate and invert the datazheet. Views Read Edit View history. Policies and guidelines Contact us. This chip is different in pinout to the TTLbut can fulfill the function of its counterpart if the wiring is modified. OR gates with more inputs can be made up from the or any of the above ICs by cascading them together.
If you are looking for an IC to perform logic level OR operation with two inputs, then this IC might be the right choice for you. In other projects Wikimedia Commons. From Wikibooks, open books for an open world. This page was last edited on 16 Decemberat A pull down resistor of k is used to hold the logic to low logic 0 when the switch is left floating. The arrangement of the CMOS components is shown below:. The truth table for the OR gate is shown below.
If a is not available, there are several ways to achieve an OR gate. As per the truth table shown above, when either one or both the input of the Gate is high the output will be high. If you have more than two inputs for your OR gate then you datasheef look into three input and four input OR gates. In other languages Add links. The logic OR operation is very simple, since this is a two input OR gate we will have only two inputs which is A and B respectively.
The resistor R is used to limit the current through the LED. For more information about the OR gate in general, see this module. The input for the gate is controlled by using a switch connected to pin A dqtasheet B of the Gate. TL — Programmable Reference Voltage. The first method will require two ICs to implement, but a total of four gates can be made. This is discussed on this page. The truth table for one of the four gates is shown to the right. Complete Technical Details can be found at the CD datasheet provided below this article.
CD4071 DATASHEET PDF
DATASHEET CD4071 PDF
CD4071 Quad 2-Input OR gate IC