DESCRIPTION
As a convenience feature of the windshield wiper intermittent and wipe/wash operation are implemented in most of the automobiles. Interval pause and afterwiping time can be set to fixed values with the help of resistors in a broad time range. Added value can be provided with an individual, continuous adjustment of the interval pause by a potentiometer which may be built into the stalk. FEATURES
D Interval pause: 4 to 20 s D Afterwiping time: 2 to 20 s D Wiper motor’s park switch D Wipe/wash mode priority D One external capacitor, determines all time sequences D Relay driver with Z-diode D Interference protection according to VDE 0839 or ISO/TR 7637/1 D Load-dump protected Ordering Information Extended Type Number U642B U642B–FP Package DIP8 SO8 Remarks Block Diagram VS 8 Relay control 7 S1 6 VRef Park switch comparator WI WA 5 VRef Input comparator Load-dump comparator VRef Logic VRef Interval comparator Wipe / wash comparator A B C D E F 1 GND 2 Interval switch 3 Timing (C2) 4 Timing (R) 94 8950 Figure 1.
TEMIC Semiconductors
