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HALL SEnsor- and contact monitor (8 channel, parallel interface)
Features
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General Description
8 channel hall sensor and switch monitor
Supply voltage range VS 5.5V to 25V
Logic supply range VCC 4.75V to 5.25V
Low standby current (ENB=1):
IVS < 18µA, IVDD < 10µA
Contact status monitoring by comparison of the
switch resistance with an internal threshold
Inputs are current limited
High noise immunity
Over temperature protected
Operating temperature range – 40°C to + 125°C
SOIC 20 package
The IC is developped for automotive applications. It
continuously monitors up to 8 hall sensors or switches
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For proper detection the external switch resistance needs to be larger than 5kΩ for OFF-state (OUTn=1)
and less than 330Ω for ON-state (OUTn=0).
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In active mode (ENB=0) all input monitors are activated
with a pull-up current switched to the inputs IN0-IN7
and the resulting voltage level is compared to a reference. The comparison is performed with threshold hysteresis corresponding to current levels of max. 6mA
(ON to OFF transition) and min. 11mA (OFF to ON).
The input current as well as the tristate driver are activated with the enable pin. Due to the tristate outputs
the IC can be used in bus configuration.
Applications
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E100.28
Monitor for mechanical switches
Monitor for hall sensors
VBAT
VS
VCC
VCC
CH7
CH0
Imax
IN0
IN1
IN2
ENB
EN
OUT0
Vref.
OUT1
OUT2
IN3
OUT3
IN4
External
µC
OUT4
IN5
OUT5
IN6
OUT6
IN7
OUT7
B
E100.28
ELMOS Semiconductor AG
Info Sheet
QM-No.: 25IS0033E.00 2009-09-09
ELMOS Semiconductor AG – Headquarters
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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.