You need just from the chip, one resistor, and one capacitor.

Often recommends standard E-series resistor/capacitor values (E12/E24) close to the target frequency.

f is approximately equal to the fraction with numerator 1 and denominator 0.8 center dot cap R center dot cap C end-fraction : Frequency in Hertz (Hz) : Resistance in Ohms ( : Capacitance in Farads (F) Alternative Estimation: Some sources use for a rougher, "rule of thumb" calculation. 2. Component Selection Guide

| (f) (Hz) | (C_1) (F) | (R_1) (Ω) | |-----------|------------|------------| | 1000 | (10^-7) | (4545) |

The oscillator circuit works as follows:

Because different manufacturers have slightly different hysteresis windows, the "exact" formula can vary. However, a widely accepted approximation for the 74HC14 is:

Or more simply for design purposes: