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 ÿ Contact monitor 8 * to VBAT, par. out 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 (8 channel to VBAT, parallel interface) FEATURES E910.34 DESCRIPTION PINNING ÿ Supply voltage range VDD 4.25V to 5.25V The IC monitors the status of all switch contact connected to VS ÿ Monitor supply voltage range VS 5.25V to 25V continuously . ÿ Maximum overvoltage protection up to 40V ÿ Internal clamp diodes at each input to VS and GND The input currents are compared with the current of an internal ÿ Low standby current (typical < 10µA) reference resistor. The IC is designed to operate with an external ÿ Contact status monitoring by comparison of the series resistor RIN0 to RIN7 of 1kÝ. The current, driven through the resistance at the inputs with an internal reference contacts keeps their resistance low. ÿ High noise immunity ÿ – 40°C to + 125°C operating temperature The output switches to high when the input resistance increases ÿ SO20w package to above 9kÝ and switches to low when the input resistance falls below 1.5kÝ. These values are valid within the supply range 5.25V APPLICATION to 25V. ÿ Automotive electronics ÿ Monitor for mechanical switches A closed switch corresponds to a low logic level on the outputs ÿ Monitor for voltage levels OUT0-7. BLOCK DIAGRAM PACKAGE Pin Name Description 1 VS Monitor supply voltage 2 IN0 Input for switch / voltage sensing 3 IN1 Input for switch / voltage sensing 4 IN2 Input for switch / voltage sensing 5 IN3 Input for switch / voltage sensing 6 IN4 Input for switch / voltage sensing 7 IN5 Input for switch / voltage sensing 8 IN6 Input for switch / voltage sensing 9 IN7 Input for switch / voltage sensing 10 ENB Chip - enable active low 11 GND Ground 12 OUT7 TTL compatible bidirectional data port 13 OUT6 TTL compatible bidirectional data port 14 OUT5 TTL compatible bidirectional data port 15 OUT4 TTL compatible bidirectional data port 16 OUT3 TTL compatible bidirectional data port 17 OUT2 TTL compatible bidirectional data port 18 OUT1 TTL compatible bidirectional data port 19 OUT0 TTL compatible bidirectional 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 ENB 10 11 VDD OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 GND VBAT VS VDD VDD CH7 CH0 EN IN0 OUT0 IN1 Ref. OUT1 IN2 OUT2 µC IN3 OUT3 IN4 OUT4 IN5 OUT5 IN6 OUT6 IN7 OUT 7 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. 68 Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited. www.elmos.de | [email protected] elmos product catalog june 2005 69