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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鈥檚 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鈥? (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

V

stab

Function

Ground

Relay control output

Signal input

Retrigger

Program input

RC-oscillator

Hysteresis output

Supply voltage 7.3 V

GND

Output

1

8

V

stab

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)

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