bus ic dc/dc converter motor driver ic ripple counter 66 block diagram driver ic i/o ic sensor ic sensor interface ic 67 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 ? contact moni tor ( 8 channel to gnd, parallel interface) e 9 1 0 . 33 features ? supply voltage range vdd 4 . 7 5 v to 5 . 2 5 v ? monitoring supply voltage range vs 5 . 2 5 v to 2 5 v ? maximum overvoltage protection up to 4 0 v ? internal clamp diodes at each input to vs and gnd ? low standby current ( typical < 1 0 a ) ? contact status monitoring by comparison of the resistance at the inputs with an internal reference ? high noise immunity ? C 4 0 c to + 1 2 5 c operating temperature ? so 2 0 w package a pplication ? automotive electronics ? monitor for mechanical switches ? monitor for voltage levels d escription the ic monitors the status of all switch contacts connected to ground continuously . the input currents are compared with the current of an internal reference resistor. the ic is designed to operate with an external series resistor rin 0 to rin 7 of 1 k y . the current, driven t hr ough the co ntact s keeps th e ir resista nce low. the output switches to high when the input resistance increases to above 9 k y and switches to low when the input resistance falls below 1 . 5 k y . these values are valid within the supply range 5 . 2 5 v to 2 5 v. a closed switch corresponds to a low logic level on the outputs out 0 - 7 . vba t vdd c vdd in 0 in 1 in 2 in 3 in 4 in 5 in 6 in 7 ref. out 0 out 1 out 2 out 3 out 4 out 5 out 6 out 7 vs en ch 0 ch 7 pin name description 1 vs monitor supply voltage 2 in 0 input for switch / voltage sensing 3 in 1 input for switch / voltage sensing 4 in 2 input for switch / voltage sensing 5 in 3 input for switch / voltage sensing 6 in 4 input for switch / voltage sensing 7 in 5 input for switch / voltage sensing 8 in 6 input for switch / voltage sensing 9 in 7 input for switch / voltage sensing 1 0 enb chip enable 11 gnd ground 1 2 out 7 ttl compatible bidirectional data port 1 3 out 6 ttl compatible bidirectional data port 1 4 out 5 ttl compatible bidirectional data port 1 5 out 4 ttl compatible bidirectional data port 1 6 out 3 ttl compatible bidirectional data port 1 7 out 2 ttl compatible bidirectional data port 1 8 out 1 ttl compatible bidirectional data port 1 9 out 0 ttl compatible bidirectional data port 2 0 vdd logic supply voltage 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 vs in 0 in 1 in 2 in 3 in 4 in 5 in 6 in 7 en b vd d ou t0 ou t1 ou t2 ou t3 ou t4 ou t5 ou t6 ou t7 gn d 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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