driven by - Elmos Semiconductor AG

driven by
E100.16
contact monitor (8 channel to vbat, parallel interface)
Features
General Description
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The IC continuously monitors the status of all switch
contacts connected to VS .
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Supply voltage range VS 5.25V to 25V
Logic supply voltage range VDD 4.25V to 5.25V
Internal clamp diodes at each input to VS and GND
Low standby current (ENB=1) IVS < 20µA
Contact status monitoring by comparing the input
resistance to an internal reference
High noise immunity
Operating temperature range – 40°C to + 125°C
SOIC 20 package
The input currents are compared to the current in an
internal reference resistor. The current, driven through
the contacts keeps their resistance low.
The output switches to high when the input resistance
increases to above 10kÝ and switches to low when the
input resistance falls below 2.5kÝ within the full supply
range 5.25V to 25V. An external series resistance of 1kÝ
is assumed to be connected between INn and the
switch for current limitation incase of over voltage.
Applications
Automotive and industrial electronics
Monitor for mechanical switches
˘ Monitor for voltage levels
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A closed switch results in a low logic level on the corresponding output OUT0-7.
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VBAT
VS
VDD
VDD
CH7
CH0
ENB
IN0
IN1
IN2
OUT0
Ref.
OUT1
OUT2
IN3
OUT3
IN4
External
µC
OUT4
IN5
OUT5
IN6
OUT6
IN7
OUT7
E100.16
ELMOS Semiconductor AG
Info Sheet
QM-No.: 25IS0041E.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.