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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 y Contact monitor 2 * 4, adj., par. out 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, adjustable, parallel interface)
FEATURES y y y y y y y y y Programmable input current of 1mA / 10mA 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 comparing the switch resistance with the internal reference High noise immunity - 40C to + 125 C operating temperature SO24w 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 to the corresponding inactive state. The input current as well as APPLICATION y y y Automotive electronics Monitor for mechanical switches Monitor for interface levels 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 1kY. 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 21 22 23 24 BLOCK DIAGRAM
VBAT
VS
E910.35
PACKAGE Name VS IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 EN LOAD CLEAR NC NC 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 Set current value register Not connected Not connected 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 Reset current value register
VS IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 EN LOAD CLEAR 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VDD OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 GND NC NC
VDD
VDD
Ref.
EN
4
IN0
4
IN1 IN2 IN3
8
8
D0 D1 D2 D3 D4 D5 D6 D7
C
VS
4
IN4 IN5
Ref. EN
4
control EN
LOAD CLEAR EN
IN6 IN7
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
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elmos product catalog june 2005
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