I am having some issues with debouncing a switch with an RC filter and 74HC14 Schmitt-trigger inverter IC. I am using a standard circuit that is linked in the datasheet. The circuit in question here and here.
I am using the normal switch debounce circuit. The output LED is partially on when the button is not pressed, and the Schmitt-trigger has an output voltage of around 2V. When the button is pressed, the output voltages goes to about 2.7V. However, if I remove the capacitor the LED stays off until the button is pressed.
My question is why is the Schmitt-trigger output never 0V? The IC has a push-pull output, so the output does not need a pullup/pulldown.
Edit: when the capacitor is removed, the output has a normal range of 0V-5V. Also, if it matters, all unused inputs are tied directly to ground, just like the datasheet states.