|| 0 V supply
|| When the pin voltage falls below 0.33 Vcc, the timer is triggered and the output goes high. In the monostable configuration a high to low transition on the trigger pin starts the timer.
|| The output pulses during astable operation and goes high for a set time in monostable operation.
|| If reset is not used, connect it to Vcc. If reset falls, a high output will be forced low.
|| control voltage
|| For reliable operation add a 10 nF capacitor to ground on this pin.
|| Detects when the voltage on the timing capacitor rises above 0.66 Vcc and resets the output when this happens.
|| Provides a discharge path from the timing capacitor to ground when the output is low.
|| Positive power supply voltage.