Part Number: NE555
"In our NE555 circuit configured as a 1Hz astable oscillator, which drives a 15mA LED and a buzzer, the timing components are a 100kΩ resistor and a 10µF capacitor. Normally, when powered on, the OUT pin goes high for about 2 seconds before starting oscillation. However, on some units, the OUT pin remains high for over 30 seconds before oscillation begins. This is the abnormal behavior."
