The simplest possible step-down circuit is a resistive divider. Drive your 5V output into a chain of resistors, from which you tap your 3.3V logic input. A chain consisting of a 2.2k and a 3.3k ...

An elementary processing function in a digital circuit. Logic function and logic circuit are used synonymously. See logic circuit and digital circuit. THIS DEFINITION IS FOR PERSONAL USE ONLY.

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A simple logic circuit that is used to connect complex logic circuits together. For example, an ASIC chip may contain large functions, such as a microprocessor, memory block or communications ...

Of course, in real life, the output won’t really be that sharp, but it will be fast and compatible with other logic signals. In practice, you might use a Schmitt trigger to read an RC circuit or ...