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 Contact monitor 2 * 4, adj., par. out ÿ Contact monitor 2 * 4, par. out Non volatile contact monitor Contact monitor 16 *, ser. out ÿ Contact monitor (4 * GND & 4 * VBAT, parallel interface) FEATURES DESCRIPTION PINNING ÿ Supply voltage range VS 5.25 to 25V The IC is developed for automotive applications. It continuously ÿ Supply voltage range VDD 4.75 to 5.25V monitors the status of two groups of switch contacts connected ÿ Maximum overvoltage protection up to 40V to GND or VBAT. ÿ Low standby current (typical < 10µA) ÿ Contact status monitoring by comparison of the The input currents are compared to internal references. The IC is switch resistance with internal reference designed to operate with an external resistor of 1k Ý. ÿ High noise immunity ÿ – 40°C to + 125 ºC operating temperature If the switch resistance is less than 1.5kÝ the IC will lead into an ÿ SO20w package active state (‘1’ for switches to VBAT and ‘0’ for switches to GND). If the resistance will be more than 9kÝ than the IC will switch APPLICATION to the corresponding inactive state. The input current as well as ÿ Automotive electronics the tristate driver are activated with the enable pin. Due to the ÿ Monitor for mechanical switches tristate outputs the IC can be used in bus configuration. ÿ Monitor for interface levels BLOCK DIAGRAM E910.36 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 Input for switch to VBAT 9 IN7 Input for switch to VBAT 10 EN 11 GND 12 OUT7 TTL compatible tristate data port 13 OUT6 TTL compatible tristate data port 14 OUT5 TTL compatible tristate data port 15 OUT4 TTL compatible tristate data port 16 OUT3 TTL compatible tristate data port 17 OUT2 TTL compatible tristate data port 18 OUT1 TTL compatible tristate data port 19 OUT0 TTL compatible tristate 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 EN 10 11 VDD OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 GND Chip enable for input current and tristate outputs, active low Ground VBAT VS VDD VDD CH7 CH4 Ref. OUT7 EN IN7 OUT6 IN6 OUT5 IN5 OUT4 EN IN4 µC CH3 CH0 VS IN3 EN OUT3 IN2 Ref. IN1 IN0 OUT2 OUT1 OUT0 72 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. www.elmos.de | [email protected] elmos product catalog june 2005 73