driven by E910.47 Non volatile contact monitor Features General Description ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ The IC is designed for use in electric power window systems to store and display the status of a childproof lock function of the rear windows. The actual status is stored in three bits of EEPROM whenever switch activity is detected. Redundancy of information is checked periodically by a two out of three selection. In case one bit differs from the others, the dominant information is stored in all three EEPROM cells again. To ensure programming of the memory is successful under all supply conditions, the energy for EEPROM programming is taken from the external capacitor at VDD. Supply voltage range VS 6.9V to 19V On chip voltage clamping Internal voltage regulator (VDD) Under voltage reset Charge pump to generate programming voltage Redundant non-volatile memory Periodical check of data consistency Automatic data correction in case of inconsistency Two I/Os to detect switch activation and drive LEDs Operating temperature range – 40°C to + 85°C SOIC 8N package Applications ÿ Status IC for switches Switch detection and the start of EEPROM programming are disabled by an under voltage detection. A programming cycle once started will always be completed. Two I/O pins are used for switch monitoring as well as driving the status LEDs. An open drain low-side driver output ( KISI ) is active when the rear window operation is released. Short to ground, an open load or an overload condition at KISI is indicated by flashing the red LED at 2Hz. VBAT VS RED GREEN L0 int. Supply VDD L1 control KISI current Limitation Status E² ELMOS Semiconductor AG Info Sheet E910.47 QM-No.: 25IS0025E.00 2009-08-27 ELMOS Semiconductor AG – Headquarters Heinrich-Hertz-Str. 1 | 44227 Dortmund | Germany Phone + 49 (0) 231 - 75 49 - 100 | Fax + 49 (0) 231 - 75 49 - 149 firstname.lastname@example.org | www.elmos.de 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 © 2009 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.