U840B Datasheet | TEMIC Semiconductors

.. Digital / Wipe-Wash Control for Rear or Front Wiper Description The circuits U840B (DIP8) and U840B-FP (SO8) are designed as interval wipe/ wash timer for automotive applications. The interval pause t3 can be set in a range from 0.8 s to 22 s by an external 30 kW potentiometer. All other time periods are determined by the basic frequency f0 of the oscillator. The wipe/ wash (WIWA) mode has priority over the interval mode. The program Pin PP controls, whether the wiper immediatly starts to wipe, or with a delay time t4 of 0.8 s. The inputs CP and INT are digital debounced, the turn-on as well as the turn-off. The integrated relay driver is protected against short...