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 ÿ 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 (4 * GND & 4 * VBAT, adjustable, parallel interface) FEATURES DESCRIPTION PINNING ÿ Programmable input current of 1mA / 10mA The IC is developed for automotive applications. It continuously ÿ Supply voltage range VS 5.25 to 25V monitors the status of two groups of switch contacts connected ÿ Supply voltage range VDD 4.75 to 5.25V to GND or VBAT. ÿ Maximum overvoltage protection up to 40V ÿ Low standby current (typical < 10µA) The input currents are compared to internal references. The IC is ÿ Contact status monitoring by comparing the designed to operate with an external resistor of 1kÝ. switch resistance with the internal reference ÿ High noise immunity If the switch resistance is less than 1.5kÝ the IC will lead into an ÿ – 40°C to + 125 ºC operating temperature active state (‘1’ for switches to VBAT and ‘0’ for switches to GND). ÿ SO24w package If the resistance will be more than 9kÝ than the IC will switch to the corresponding inactive state. The input current as well as APPLICATION the tristate driver are activated with the enable pin. Due to the ÿ Automotive electronics ÿ Monitor for mechanical switches ÿ Monitor for interface levels BLOCK DIAGRAM E910.35 tristate outputs the IC can be used in bus configuration. 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 9 IN7 10 EN 11 LOAD 12 CLEAR Reset current value register 13 NC Not connected 14 NC Not connected 15 GND Ground 16 OUT7 TTL compatible tristate data port 17 OUT6 TTL compatible tristate data port 18 OUT5 TTL compatible tristate data port 19 OUT4 TTL compatible tristate data port 20 OUT3 TTL compatible tristate data port 21 OUT2 TTL compatible tristate data port 22 OUT1 TTL compatible tristate data port 23 OUT0 TTL compatible tristate data port 24 VDD Logic supply voltage VS 1 24 IN0 2 23 IN1 3 22 IN2 4 21 IN3 5 20 IN4 6 19 IN5 7 18 IN6 8 17 IN7 9 16 Input for switch to VBAT EN 10 15 LOAD 11 14 Input for switch to VBAT CLEAR 12 13 VDD OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 GND NC NC Chip enable for input current and tristate outputs, active low Set current value register VBAT VDD VDD VS Ref. EN 4 D0 D1 D2 D3 D4 D5 D6 D7 IN0 4 IN1 IN2 IN3 8 8 µC VS 4 IN4 control 4 Ref. IN6 IN7 70 LOAD CLEAR IN5 EN EN EN 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 71