The 74×05 (also known as 74HC05) is a chip with six open-collector inverters – or NOT-gates. An open collector output means you can hook it up to different logic levels easily. But, it also means the outputs behave a little bit differently from a standard NOT gate chip.
In this guide, you’ll learn what this chip does and how you can use NOT gates for whatever it is you’re making.he 74×05 gives you six NOT gates. Each with an open-collector output. A NOT gate (or inverter) is a logic gate that outputs the opposite of the input. In the truth table below, you can see what the output will be for any given input:
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