U642B TEMIC Semiconductors, U642B Datasheet

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U642B

Manufacturer Part Number
U642B
Description
Manufacturer
TEMIC Semiconductors
Datasheet

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TELEFUNKEN Semiconductors
Rev. A1, 13-Feb-97
Automotive Wipe/Wash or Interval Switch
Description
As a convenience feature of the windshield wiper inter-
mittent and wipe/wash operation are implemented in
most of the automobiles. The U642B controls all timing
functions accurately at a reasonable price level. Interval
pause and afterwiping time can be set to fixed values with
the help of resistors in a broad time range. Added value
Features
D
D
D
D
Ordering Information
Block Diagram
Interval pause: 4 to 20 s
Afterwiping time: 2 to 20 s
Wiper motor’s park switch
Wipe/wash mode priority
Extended Type Number
U642B–FP
U642B
GND
V S
1
8
V Ref
V Ref
Load-dump
comparator
comparator
Interval
Relay control
Figure 1. Block diagram
Interval switch
Package
7
DIP8
SO8
A
2
B
can be provided with an individual, continuous adjust-
ment 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.
D
D
D
D
Logic
S 1
C
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 protected
Timing (C 2 )
6
Park switch
V Ref
comparator
D
3
WI WA
E
5
Timing (R)
comparator
V Ref
F
Input
Wipe / wash
comparator
4
Remarks
94 8950
U642B
1 (6)

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U642B Summary of contents

Page 1

... Description As a convenience feature of the windshield wiper inter- mittent and wipe/wash operation are implemented in most of the automobiles. The U642B controls all timing functions accurately at a reasonable price level. Interval pause and afterwiping time can be set to fixed values with the help of resistors in a broad time range. Added value ...

Page 2

... The switching delays are slightly shorter, because the capacitor is already charged to a value The Wipe/Wash function is not interrupted when interval switch S is activated. Interval function begins after the 2 WIWA function is over Batt RELAY 7 U642B WIWA 5 93 7691 Figure 2. Pinning . Afterwards the Time . 1 ...

Page 3

... Interval switch Symbol V Batt Pin Pin Pin Pin Pin tot T stg T amb U642B WIWA 8951 Water pump Value Unit 28 V 1.5 A 150 mA 200 mA 1 500 mW –55 to +125 C – ...

Page 4

... U642B Thermal Resistance Parameters Junction ambient DIP8 SO8 Electrical Characteristics (see figure KEIN MERKER) unless otherwise specified. Batt amb Parameters Test Conditions / Pins Supply voltage Supply current Z-diode limitation Overvoltage Threshold current Threshold voltage Relay control output Saturation voltage ...

Page 5

... Package Information Package DIP8 Dimensions in mm 0.58 0. Package SO8 Dimensions in mm 0.4 1. TELEFUNKEN Semiconductors Rev. A1, 13-Feb-97 9.8 7.77 9.5 7.47 1.64 1.44 4.8 max 6.4 max 3.3 0.5 min 0.36 max 9.8 2.54 8.2 7.62 5 technical drawings according to DIN specifications 4 5.2 4.8 5.00 4.85 3.7 1.4 0.25 3.8 0.10 6.15 3.81 5.85 5 technical drawings according to DIN specifications 5 U642B 13021 0.2 13034 5 (6) ...

Page 6

... U642B Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment ...

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