U690B

U690B Rear Wiper Interval/Wipe-Wash Control Description The bipolar integrated circuit, U690B, is designed with a time coded input for the rear pane wiper application. The length of the input signal determines the mode of operation i.e., intermittent or wipe/ wash; therefore, only one signal line is sufficient from the input switch to the electronic module. Features D D D D D D D Time controlled interval/ wipe-wash Wiper arm’s park position control Interval pause typ. 7 s Dry wiping time typ. 4.4 s Multipurpose frequency comparator Relay driver with Z-diode RC-oscillator determines switching characteristics D Debounced main signal input D Power-on reset by low-voltage identification D Protection according to ISO / TR 7637–1 (VDE 0839) D Load-dump protection Applications Speed or R.P.M. detection Ordering Information Extended Type Number U690B Package DIP8 Remarks Pin Configuration Pin 1 2 3 4 5 6 7 8 Symbol GND Output Input Retrigger Program OSC Hyst Vstab Function Ground Relay control output Signal input Retrigger Program input RC-oscillator Hysteresis output Supply voltage 7.3 V GND Output 1 8 Vstab Hyst 2 7 Input Retrigger 3 6 OSC Program 4 94 9328 5 Figure 4. Pinning TELEFUNKEN Semiconductors Rev. A2, 28-Apr-97 1 (9) U690B Block Diagram C2 10 nF R2 47 mF C1 R1 1 kW 15 VBatt 360 kW Hyst 7 OSC 6 Vstab 8 Oscillator Stabilization Power-on-Reset Load-dump detection 1 GND 53 VBatt 15 Frequency comparator R4 180 kW 2 Debouncing Logic Relay output Relay ou...