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Automotive Wash Wiper Timer

The MC33197A is a standard wiper timer control device designed for harsh automotive applications. The device can perform the intermittent, after wash, and continuous wiper timer functions. It is designed to directly drive a wiper motor relay. The MC33197A requires very few external components for full system implementation. The intermittent control pin can be switched to ground or Vbat to meet a large variety of possible applications. The intermittent timing can be fixed or adjustable via an external resistor. The MC33197A is built using bipolar technology and parametrically specified over the automotive ambient temperature range and 8.0 to 16 V supply voltage. The MC33197A can operate in both front and rear wiper applications.

? Adjustable Time Interval of Less Than 500 ms to More Than 30 s

? Intermittent Control Pin Can Be Switched to Ground or Vbat

? Adjustable After Wipe Time

? Priority to Continuous Wipe

? Minimum Number of Timing Components

? Integrated Relay Driver With Free Wheeling Protection Diode

? Operating Voltage Range From 8.0 to 16 V

? For Front Wiper and Rear Wiper Window Applications