Features: ` Interval pause: 4 to 20 s` Afterwiping time: 2 to 20 s` Wiper motor's park switch` Wipe/wash mode priority` One external capacitor, determines all time sequences` Relay driver with Z-diode` Interference protection according to VDE 0839 or ISO/TR 7637/1` Load-dump protectedPinoutSpecifi...
U642B: Features: ` Interval pause: 4 to 20 s` Afterwiping time: 2 to 20 s` Wiper motor's park switch` Wipe/wash mode priority` One external capacitor, determines all time sequences` Relay driver with Z-dio...
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Parameters |
Symbol |
Value |
Unit |
Supply voltage t = 60 s Terminal 15, Pin 8 |
VBatt |
28 |
V |
Supply current t = 2 ms Pin 8 t = 200 ms |
I8 I8 |
1.5 150 |
A mA |
Relay control output current (DC) Pin 7 t = 200 ms |
I7 I7 |
200 1.2 |
A mA |
Pulse current (control inputs) t = 200 ms |
|
||
Park switch, S1 Pin 6 Wipe/Wash switch, S3 Pin 5 Interval switch, S2 Pin 2 |
I6 I5 I2 |
50 50 50 |
mA |
Power dissipation Tamb = 90°C |
Ptot |
500 |
mW |
Storage temperature range |
Tstg |
-55to+125 |
|
Ambient temperature range |
Tamb |
-40to+85 |
As a convenience U642B feature of the windshield wiper intermittent and wipe/wash operation are implemented in most of the automobiles. The U642B is the low-cost solution for an accurate timing function control. Wipe/wash mode has priority over interval mode. Interval pause and afterwiping time can be set to fixed values by using 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. For proper operation it is mandatory to feed the signal of the wiper motor's park switch into U642B.