ELMOS E910.36

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
ÿ Contact monitor 2 * 4, par. out
Non volatile contact monitor
Contact monitor 16 *, ser. out
ÿ Contact monitor (4 * GND & 4 * VBAT, parallel interface)
FEATURES
DESCRIPTION
PINNING
ÿ
Supply voltage range VS 5.25 to 25V
The IC is developed for automotive applications. It continuously
ÿ
Supply voltage range VDD 4.75 to 5.25V
monitors the status of two groups of switch contacts connected
ÿ
Maximum overvoltage protection up to 40V
to GND or VBAT.
ÿ
Low standby current (typical < 10µA)
ÿ
Contact status monitoring by comparison of the
The input currents are compared to internal references. The IC is
switch resistance with internal reference
designed to operate with an external resistor of 1k Ý.
ÿ
High noise immunity
ÿ
– 40°C to + 125 ºC operating temperature
If the switch resistance is less than 1.5kÝ the IC will lead into an
ÿ
SO20w package
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
APPLICATION
to the corresponding inactive state. The input current as well as
ÿ
Automotive electronics
the tristate driver are activated with the enable pin. Due to the
ÿ
Monitor for mechanical switches
tristate outputs the IC can be used in bus configuration.
ÿ
Monitor for interface levels
BLOCK DIAGRAM
E910.36
PACKAGE
Pin
Name
Description
1
VS
Supply voltage
2
IN0
Input for switch to GND
3
IN1
Input for switch to GND
4
IN2
Input for switch to GND
5
IN3
Input for switch to GND
6
IN4
Input for switch to VBAT
7
IN5
Input for switch to VBAT
8
IN6
Input for switch to VBAT
9
IN7
Input for switch to VBAT
10
EN
11
GND
12
OUT7
TTL compatible tristate data port
13
OUT6
TTL compatible tristate data port
14
OUT5
TTL compatible tristate data port
15
OUT4
TTL compatible tristate data port
16
OUT3
TTL compatible tristate data port
17
OUT2
TTL compatible tristate data port
18
OUT1
TTL compatible tristate data port
19
OUT0
TTL compatible tristate data port
20
VDD
Logic supply voltage
VS
1
20
IN0
2
19
IN1
3
18
IN2
4
17
IN3
5
16
IN4
6
15
IN5
7
14
IN6
8
13
IN7
9
12
EN
10
11
VDD
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
GND
Chip enable for input current and
tristate outputs, active low
Ground
VBAT
VS
VDD
VDD
CH7
CH4
Ref.
OUT7
EN
IN7
OUT6
IN6
OUT5
IN5
OUT4
EN
IN4
µC
CH3
CH0
VS
IN3
EN
OUT3
IN2
Ref.
IN1
IN0
OUT2
OUT1
OUT0
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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.
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elmos product catalog june 2005
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