driven by - Elmos Semiconductor AG

driven by
contact monitor (4 x GND and 4 x VBAT, parallel interface)
E100.12
Features
General Description
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The IC is developed for automotive applications. It continuously monitors the status of two groups of switch
contacts connected to supply or ground at inputs IN7-4
or IN3-0, respectively. The input currents are compared
to an internal reference.
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Supply voltage range VS 5.25V to 25V
Logic supply voltage range VDD 4.75V to 5.25V
Low standby current (ENB=1) IVS < 20µA
Contact status monitoring by comparing the
switch resistance to an internal reference
High noise immunity
Operating temperature range – 40°C to + 125 ºC
SOIC 20 package
If the switch resistance is less than 2.5kÝ the IC will
switch into an active state low at the outputs and if
the resistance is above 10kÝ the outputs will switch to
high state, with a series resistance assumed to be connected between input INn and the switch for current
limitation in case of over or under voltage.
Applications
Automotive and industrial electronics
Monitor for mechanical switches
˘ Monitor for voltage levels
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The input current sources and the tri-state driver outputs are activated by the enable pin ENB (active low).
The tri-state outputs allow a bus configuration of several ICs in parallel.
VBAT
VS
VDD
VDD
CH7
CH4
Ref.
OUT7
EN
IN7
OUT6
IN6
OUT5
IN5
OUT4
ENB
IN4
External
µC
CH3
CH0
VS
EN
IN3
IN2
IN1
OUT3
Ref.
OUT2
OUT1
IN0
OUT0
E100.12
ELMOS Semiconductor AG
Info Sheet
QM-No.: 25IS0042E.00 2009-09-29
ELMOS Semiconductor AG – Headquarters
Heinrich-Hertz-Str. 1 | 44227 Dortmund | Germany
Phone + 49 (0) 231 - 75 49 - 100 | Fax + 49 (0) 231 - 75 49 - 149
sales@elmos.de | www.elmos.de
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 © 2009 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.