BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
DRIVER IC
I/O IC
Analog multiplexer
8:1
ÿ
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
SENSOR IC
SENSOR INTERFACE IC
ÿ
Contact monitor (8 channel to GND, parallel interface)
FEATURES
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
Supply voltage range VDD
4.75V
to
5.25V
Monitoring supply voltage range VS
5.25V
to
25V
Maximum overvoltage protection up to
40V
Internal clamp diodes at each input to VS and GND
Low standby current ( typical <
10µA
)
Contact status monitoring by comparison of the
resistance at the inputs with an internal reference
High noise immunity
–
40°C
to +
125°C
operating temperature
SO20w package
The output switches to high when the input resistance increases
to above
9kÝ
and switches to low when the input resistance falls
below
1.5kÝ.
These values are valid within the supply range
5.25V
APPLICATION
ÿ
ÿ
ÿ
Automotive electronics
Monitor for mechanical switches
Monitor for voltage levels
A closed switch corresponds to a low logic level on the outputs
OUT0-7.
to
25V.
The input currents are compared with the current of an internal
reference resistor. The IC is designed to operate with an external
series resistor RIN0 to RIN7 of
1kÝ.
The current, driven through the
contacts keeps their resistance low.
DESCRIPTION
The IC monitors the status of all switch contacts connected to
ground continuously .
PINNING
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Name
VS
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
ENB
GND
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
VDD
Description
Monitor supply voltage
Input for switch / voltage sensing
Input for switch / voltage sensing
Input for switch / voltage sensing
Input for switch / voltage sensing
Input for switch / voltage sensing
Input for switch / voltage sensing
Input for switch / voltage sensing
Input for switch / voltage sensing
Chip enable
Ground
TTL compatible bidirectional data port
TTL compatible bidirectional data port
TTL compatible bidirectional data port
TTL compatible bidirectional data port
TTL compatible bidirectional data port
TTL compatible bidirectional data port
TTL compatible bidirectional data port
TTL compatible bidirectional data port
Logic supply voltage
VS
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
ENB
1
2
3
4
5
6
7
8
9
10
E910.33
PACKAGE
20
19
18
17
16
15
14
13
12
11
VDD
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
GND
BLOCK DIAGRAM
VBAT
VS
VDD
VDD
CH7
CH0
EN
IN0
OUT0
IN1
IN2
OUT2
IN3
OUT3
IN4
OUT 4
IN5
OUT 5
IN6
OUT 6
IN7
OUT7
Ref.
OUT 1
µC
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.
66
Copyright ©
2005
ELMOS
Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
www.elmos.de | sales@elmos.de
elmos product catalog june
2005
67
ELMOS [ ELMOS SEMICONDUCTOR AG ]
