f≈10.8⋅R⋅C≈1.25R⋅Cbold f is approximately equal to the fraction with numerator 1 and denominator 0.8 center dot bold cap R center dot bold cap C end-fraction is approximately equal to the fraction with numerator 1.25 and denominator bold cap R center dot bold cap C end-fraction

Requires only one 74HC14 inverter, one resistor, and one capacitor.

Selecting the correct resistor and capacitor values is the most critical step in designing a reliable 74HC14 oscillator.

, demonstrating the formula provides a close approximation, with exact frequency depending on the specific threshold voltages ( VT+cap V sub cap T plus end-sub VT−cap V sub cap T minus end-sub 74HC14 Oscillator Calculator Table