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i want to know how to set unused pins of ic to gnd or vcc

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i want to know how to set unused pins of ic to gnd or vcc for safety

and i want to know also how to use some gates of the ic not all for example i want to use 3 gates of not ic and set the rest to vcc or ground

and i want to use 2 in an ic and the 3rd one in a new ic

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  • Hi, If you have a multiple gate IC you can effectively ignore the gates you are not using. If you accidently ground an output that is trying to go high you will just increase the power consumption of your circuit. The gates in a multiple gate IC are separate and will not interfere with each other. Unless you are using the particular gate I would ignore, and let float its inputs and output pins.  It is a good idea to consult the data sheet on your IC for the manufacturers recommendation. Some specialty ICs can be programmed to do different things depending on grounding or pulling high designated pins.

    When I posted this I reply I thought we were discussing prototyping construction. If this is about Eagle then I will defer to someone else to answer the question.

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  • Hi, If you have a multiple gate IC you can effectively ignore the gates you are not using. If you accidently ground an output that is trying to go high you will just increase the power consumption of your circuit. The gates in a multiple gate IC are separate and will not interfere with each other. Unless you are using the particular gate I would ignore, and let float its inputs and output pins.  It is a good idea to consult the data sheet on your IC for the manufacturers recommendation. Some specialty ICs can be programmed to do different things depending on grounding or pulling high designated pins.

    When I posted this I reply I thought we were discussing prototyping construction. If this is about Eagle then I will defer to someone else to answer the question.

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