The L4620 is an integrated circuit, designed for the liquid level control in automotive applications. The liquid level is indicated by an attenuation between transmitted and received signal across a sensor tip in the lquid. If the attenuation exceedes an internal threshold- sensortip outsidethe liquid or liquid temperaturehigher than a determinedvalue - a squarewave alarm output indicates an unsufficient liquid condition.If the liquid levelis restoredbeforethe end of a delay time the alarm is not activated. Throughtwo pins it is possible to program : the delay