Features

1.

Description

The U642B is a bi-polar integrated circuit designed for the wiper application in the

automotive market. It includes wipe, wash and internal mode.

2.

Functional Description

As a convenience feature of the windshield wiper, intermittent and wipe/wash opera-

tion functions are implemented in most of the automobiles. The U642B is a

cost-effective solution for an accurate timing function control. Wipe/wash mode has

priority over interval mode. Interval pause and after-wiping time can be set to fixed val-

ues 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.

Interval and

Wipe/Wash

Wiper Control

IC

U642B

Rev. 4774B–AUTO–09/05