U2642B
Intermittent- and Wipe/Wash Control for Wiper Systems
Description
With the U264xB, TEMIC Semiconductors developed a
family of intermittent- and wipe/wash control circuits for
windshield or backlite wiper systems with identical basic
functions. The circuit design provides the possibility to
generate ”x” versions using different metallization
masks. Thus, it is easy to verify a broad range of time se-
quences which can be set independently of each other.
Features
D
Relay activation can be controlled by a limit switch of
the wiper motor or by a fixed activation period for
systems without limit switch
D
Relay activation:
D
Interval pause:
D
After wiping:
D
Pre-wash delay:
0.64 s
10 s
5.8 s
0.91 s
D
D
D
D
D
Debounced input stages
Enable/disable of pre-wash delay by program pin
Polarity of WIWA: V
Batt
Polarity of INT:
V
Batt
Relay output is protected with a clamping diode
D
Wipe/wash mode with priority
D
Protected in accordance to ISO/TR 7637–1
D
EMC with intergrated filters
Ordering Information
Extended Type Number
U2642B
U2642B–FP
Package
DIP8
SO8
Remarks
Block Diagram
VS
OSC
Voltage
stabilization
and
POR
Oscillator
INT
21 V
WIWA
21 V
LS
21 V
PP
21 V
Input
comparator
Logic
Load-
dump
detection
and
output
control
Open-collector
relay driver
REL
21 V
GND
13944
Figure 1.
TELEFUNKEN Semiconductors
Rev. A2, 02-Dec-97
1 (10)
TEMIC [ TEMIC SEMICONDUCTORS ]
