BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
DRIVER IC
I/O IC
Analog multiplexer
8:1
Contact monitor
8
*
to GND, par. out
Contact monitor
8
*
to VBAT, par. out
ÿ
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 (4
*
GND &
4
*
VBAT, adjustable, parallel interface)
FEATURES
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
ÿ
Programmable input current of
1mA
/
10mA
Supply voltage range VS
5.25
to
25V
Supply voltage range VDD
4.75
to
5.25V
Maximum overvoltage protection up to
40V
Low standby current (typical <
10µA)
Contact status monitoring by comparing the
switch resistance with the internal reference
High noise immunity
–
40°C
to +
125
ºC operating temperature
SO24w package
If the switch resistance is less than
1.5kÝ
the IC will lead into an
active state (‘1’ for switches to VBAT and ‘0’ for switches to GND).
If the resistance will be more than
9kÝ
than the IC will switch
to the corresponding inactive state. The input current as well as
APPLICATION
ÿ
ÿ
ÿ
Automotive electronics
Monitor for mechanical switches
Monitor for interface levels
the tristate driver are activated with the enable pin. Due to the
tristate outputs the IC can be used in bus configuration.
The input currents are compared to internal references. The IC is
designed to operate with an external resistor of
1kÝ.
DESCRIPTION
The IC is developed for automotive applications. It continuously
monitors the status of two groups of switch contacts connected
to GND or VBAT.
PINNING
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
BLOCK DIAGRAM
VBAT
VS
E910.35
PACKAGE
Name
VS
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
EN
LOAD
CLEAR
NC
NC
GND
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
OUT0
VDD
Description
Supply voltage
Input for switch to GND
Input for switch to GND
Input for switch to GND
Input for switch to GND
Input for switch to VBAT
Input for switch to VBAT
Input for switch to VBAT
Input for switch to VBAT
Chip enable for input current and
tristate outputs, active low
Set current value register
Not connected
Not connected
Ground
TTL compatible tristate data port
TTL compatible tristate data port
TTL compatible tristate data port
TTL compatible tristate data port
TTL compatible tristate data port
TTL compatible tristate data port
TTL compatible tristate data port
TTL compatible tristate data port
Logic supply voltage
Reset current value register
VS
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
EN
LOAD
CLEAR
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
GND
NC
NC
VDD
VDD
Ref.
EN
4
IN0
4
IN1
IN2
IN3
8
8
D0
D1
D2
D3
D4
D5
D6
D7
µC
VS
4
IN4
IN5
Ref.
EN
4
control
EN
LOAD
CLEAR
EN
IN6
IN7
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.
www.elmos.de | sales@elmos.de
70
elmos product catalog june
2005
71
ELMOS [ ELMOS SEMICONDUCTOR AG ]
