To ensure the oscillator starts and runs reliably, you must respect the limits defined in the datasheet (e.g., NXP, Texas Instruments).
[ f \approx \frac10.8 \cdot R \cdot C ] (some use 0.8, others ~0.78–0.85) 74hc14 oscillator calculator full
A simple calculator using ( f = 0.81/RC ) is fine for a rough estimate, but it has major limitations. A calculator must account for: To ensure the oscillator starts and runs reliably,
A 74HC14 oscillator functions by exploiting the chip's internal . 74hc14 oscillator calculator full