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What is quadruple in integrated circuit gates? Is it just about 4 gates inside the IC or anything else more special?

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    \$\begingroup\$ What does the datasheet show? \$\endgroup\$ – Nick Alexeev Mar 4 '15 at 18:50
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Yes, it is usually an IC with 4 of the same gate inside it sharing a common \$V_{CC}\$ and GND.

The datasheets sum this up pretty well. Here is a quad NAND gate pinout:

enter image description here

Notice that there is one set of power connections and 4 identical gates.

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  • \$\begingroup\$ You will also find the terms "double", "triple", and "hex" (and others), meaning two, three, or six identical gates in one package. \$\endgroup\$ – Peter Bennett Mar 4 '15 at 18:46
  • \$\begingroup\$ And "octal", meaning eight. For example in buffers used for data and address busses. cc: @PeterBennett \$\endgroup\$ – jippie Mar 4 '15 at 18:53
  • \$\begingroup\$ @dipylon Feel free to accept this answer if you thought it answered your question the best :) \$\endgroup\$ – Greg d'Eon Mar 4 '15 at 18:55
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Normally, yes, it refers to the number of gates in a chip.

A "Quad 2-input NAND gate" (74xx00) has 4 gates in it, each with 2 inputs.

If there is a 4 input or 4 bit gate it is normally referred to as such - a "4-bit ripple counter" or a "4-input OR", etc.

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Quadruple, or more commonly just "quad", means 4 of something in a package. For example, the 7400 is a "quad NAND gate" chip, and the LM324 a "quad opamp". Yes it really is that simple.

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