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| BUS IC DC/DC CONVERTER MOTOR DRIVER IC RIPPLE COUNTER DRIVER IC I/O 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 y Contact monitor 2 * 4, par. out Non volatile contact monitor Contact monitor 16 *, ser. out SENSOR IC SENSOR INTERFACE IC y Contact monitor (4 * GND & 4 * VBAT, parallel interface) FEATURES y y y y y y y y Supply voltage range VS 5.25 to 25V Supply voltage range VDD 4.75 to 5.25V Maximum overvoltage protection up to 40V Low standby current (typical < 10A) Contact status monitoring by comparison of the switch resistance with internal reference High noise immunity - 40C to + 125 C operating temperature SO20w package If the switch resistance is less than 1.5kY the IC will lead into an active state (`1' for switches to VBAT and `0' for switches to GND). If the resistance will be more than 9kY than the IC will switch APPLICATION y y y Automotive electronics Monitor for mechanical switches Monitor for interface levels to the corresponding inactive state. 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. The input currents are compared to internal references. The IC is designed to operate with an external resistor of 1k Y. DESCRIPTION The IC is developed for automotive applications. It continuously monitors the status of two groups of switch contacts connected to GND or VBAT. PINNING Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name VS IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 EN GND OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0 VDD Description Supply voltage Input for switch to GND Input for switch to GND Input for switch to GND Input for switch to GND Input for switch to VBAT Input for switch to VBAT Input for switch to VBAT Input for switch to VBAT Chip enable for input current and tristate outputs, active low Ground TTL compatible tristate data port TTL compatible tristate data port TTL compatible tristate data port TTL compatible tristate data port TTL compatible tristate data port TTL compatible tristate data port TTL compatible tristate data port TTL compatible tristate data port Logic supply voltage VS IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 EN 1 2 3 4 5 6 7 8 9 10 E910.36 PACKAGE 20 19 18 17 16 15 14 13 12 11 VDD OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 GND BLOCK DIAGRAM VBAT VS VDD CH7 VDD Ref. EN CH4 OUT7 IN7 IN6 IN5 IN4 OUT6 OUT5 OUT4 EN CH3 C CH0 VS IN3 IN2 EN OUT3 Ref. IN1 IN0 OUT2 OUT1 OUT0 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 (c) 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited. www.elmos.de | sales@elmos.de 72 elmos product catalog june 2005 73 |
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