bus ic dc/dc converter motor driver ic ripple counter 74 block diagram driver ic i/o ic sensor ic sensor interface ic 75 elmos product catalog june 2 00 5 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 signi?cantly affect its safety or effectiveness. products are not authorized for use in such applications. copyright ? 2 00 5 elmos reproduction, in part or whole, without the prior written consent of elmos, is prohibited. www.elmos.de | sales@ elmos .de pinning package ? non volatile contact monitor e 9 1 0 . 4 7 features ? supply voltage range vs 6 . 9 v to 1 9 v ? on chip voltage clamping ? 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 ? C 4 0 c to + 8 5 c operating temperature ? so 8 n package a pplication ? status ic for switches d escription 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 the eeprom whenever switch activity is detected. the redundant in - formation is checked periodically by a two out of three selection and in case of one bit distinguishes from the others, the dominant information is stored in all three eeprom cells again. to make sure that programming the memory is successful under all supply voltage conditions, the energy is taken from an external capacitor once the programming cycle has started. the capacitor is charged by an internal voltage regulator. switch detection and the start of the programming cycle are disabled by an undervolt - age detection, while a programming cycle once started will al - ways be completed. two i/o pins are used for detecting switch activation as well as driving the leds to display the status. an open drain low-side driver output kisi is active when the rear window operation is released. detection of a short to ground, an open load or an overload condi - tion on kisi will be indicated by ?ashing the red led with 2 hz. vba t vs vdd green red l0 l1 kisi control status e2 int. supply current limitation 1 2 3 4 8 7 6 5 kisi l1 vs te st 1 gn d l0 te st 2 vd d pin name description 1 kisi output for status; low side driver 2 l 1 input and led driver 3 vs supply voltage 4 test 1 for test only; connect to gnd 5 vdd vdd output 6 test 2 for test only; connect to gnd 7 l 0 input and led driver 8 gnd gnd analog multi plexer 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 contact monitor 1 6 * , ser. out
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