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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 Contact monitor 2 * 4, par. out Non volatile contact monitor y Contact monitor 16 *, ser. out SENSOR IC SENSOR INTERFACE IC y Contact monitor to GND or VBAT (16 channel, serial interface) FEATURES y y y y y y y y y y y Supply range VDD 3.8V to 6V Supply range VS 5.5V to 18V Maximum over voltage protection up to 45V Low standby current (typical < 100A) Parallel to serial interface High noise immunity Contact status monitoring by comparison to internal reference Interrupt request generated on debounced pin change Filtering of all inputs - 40C to + 105C operating temperature SO28w package All inputs compare with the internal reference, will be debounced and can be monitored by the SPI. Additionally the inputs IN15 and IN14 are available on their outputs D15 and D14 directly without debouncing. DESCRIPTION The IC is intended to reduce the costs of products with a large number of inputs and also to reduce software overhead by generating an interrupt on pin change. To decrease the system power dissipation the external driver transistors are only active for 20s of a 7ms frame corresponding to 140 Hz polling frequency. PINNING Pin 1 2 3 4-11 12 13 14 15 16 17 18-25 26 27 28 Name DATA0 DATA1 DATA2 IN0-7 GND TEST VS TB1 TB2 IRQ IN15-8 CS CK VDD Description Tristate output - serial transmission of the inputs IN0-15 in normal mode Logic level output of the input IN14 Logic level output of the input IN15 Input 0-7 Ground Test, connect to ground Analog supply voltage Control signal of the external PNP transistor (T1) Control signal of the external NPN transistor (T2) Informs the C about a change of the input state (open drain) Input 15-8 Modus signal CS=0 : "stand-by" mode, CS=1: normal mode Clock used for the parallel load and serial transmission of the inputs Logic supply voltage PACKAGE E910.52 DATA0 DATA1 DATA2 IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 GND TEST VS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VDD CK CS IN8 IN9 IN10 IN11 IN12 IN13 IN14 IN15 IRQ TB2 TB1 APPLICATION y y y Automotive electronics Monitor for mechanical switches Monitor for voltage levels BLOCK DIAGRAM VBAT VS VS TB1 VDD VDD CH15 IN0 D15 VS CH0 D14 + Ref. _ C Ctrl (debounce, wakeup, IRQ) IRQ IN15 D0 SPI CLK CS TB2 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 76 elmos product catalog june 2005 77 |
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