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U642B-FP PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 U642B-FP
部品説明 Interval- and Wipe/ Wash Wiper Control IC
メーカ ATMEL Corporation
ロゴ ATMEL Corporation ロゴ 



Total 7 pages
		

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U642B-FP Datasheet, U642B-FP PDF,ピン配置, 機能
Interval- and Wipe/ Wash Wiper Control IC
U642B
Description
As a convenience 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.
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
Block Diagram
VS
8
OUT
7
Load-dump
comparator
PARK
6
VRef
WASH
5
VRef
Park switch Input
comparator comparator
VRef
VRef
Logic
Wipe / wash
comparator
Interval
comparator
A
B
C
DE F
1
GND
23
INT Ct
Figure 1. Block diagram
4
Rt
94 8950
Rev. A4, 10-Apr-01
1 (7)

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