BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
DRIVER IC
I/O IC
SENSOR IC
SENSOR INTERFACE IC
Analog multiplexer 8:1
Contact monitor 8 * to GND, par. out
Contact monitor 8 * to VBAT, par. out
Contact monitor 2 * 4, adj., par. out
Contact monitor 2 * 4, par. out
Non volatile contact monitor
Contact monitor 16 *, ser. out
ÿ
ÿ Non volatile contact monitor
E910.47
FEATURES
DESCRIPTION
PINNING
PACKAGE
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
Supply voltage range VS 6.9V to 19V
On chip voltage clamping
Under voltage reset
Charge pump to generate programming voltage
Redundant non - volatile memory
Periodical check of data consistency
Automatic data correction in case of inconsistency
Two I/Os to detect switch activation and
drive LEDs
The IC is designed for use in electric power window systems to
store and display the status of a childproof lock function of the
rear windows. The actual status is stored in three bits of the
EEPROM whenever switch activity is detected. The redundant in-
formation is checked periodically by a two out of three selection
and in case of one bit distinguishes from the others, the dominant
information is stored in all three EEPROM cells again.
Pin
1
2
3
4
5
6
7
8
Name
KISI
L1
Description
Output for status; low side driver
Input and LED driver
Supply voltage
For test only; connect to GND
VDD output
For test only; connect to GND
Input and LED driver
GND
KISI
L1
VS
1
2
3
4
8
7
6
5
GND
L0
TEST2
VDD
VS
TEST1
TEST1
VDD
TEST2
L0
To make sure that programming the memory is successful under
all supply voltage conditions, the energy is taken from an external
capacitor once the programming cycle has started. The capacitor
is charged by an internal voltage regulator. Switch detection and
the start of the programming cycle are disabled by an undervolt-
age detection, while a programming cycle once started will al-
ways be completed.
GND
ÿ
ÿ
–40°C to +85°C operating temperature
SO8n package
APPLICATION
ÿ
Status IC for switches
Two I/O Pins are used for detecting switch activation as well as
driving the LEDs to display the status. An open drain low-side
driver output “KISI” is active when the rear window operation is
released.
Detection of a short to ground, an open load or an overload condi-
tion on KISI will be indicated by flashing the red LED with 2Hz.
VBAT
BLOCK DIAGRAM
VS
RED
GREEN
L0
VDD
int. Supply
L1
control
KISI
current
Limitation
Status E²
Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any
circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication
has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of
the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications.
Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
74
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75
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