ELMOS E910.35

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