t h e t l e 7 7 2 9 C satric tm - is a highly integrated interface ic specially designed for automotive restraint applications. the device, located in the e cu ( e lectronic control unit) of the airbag system, is able to receive data from different types of intelligent sensors like inertia and pressure sensor satellites for front-, side-, or rear-crash sensor applications. it provides a pre-regulated power supply voltage to the satellites over a twisted pair of wires. the satellite module transmits digital data to tl e 7729 by modulating the line current. applications automotive restraint applications features 4 independent satellite receiver channels for current modulated data e ach channel can support up to two satellites with a total of up to eight sensors data rate 125 kbaud support of 11-, 13-, 18-bit manchester 1 or 2 encoded messages channel confguration in pairs (bus mode, protocol type) supply of satellite channels via 4 independent voltage regulators adjustable current level detection thresholds asynchronous and synchronous data transmission modes all digital i/os are 3.3 v and 5 v compatible 4 digital outputs for voltage-converted received satellite signals 16-bit 8 m h z serial peripheral interface (spi) e mbedded protocol handler for data preprocessing small p-tssop-28 package embedded protection functions current limitation in case of satellite output shorted to gnd or battery channel specifc over-temperature shutdown w w w . i n f i n e o n . c o m / r e s t r a i n t - s y s t e m - i c automotive power product brief tle 7729 4 channel airbag satellite receiver ic satric tm power suppl y & co ntrol protoc ol handler & co ntrol logi c sa tfd1 - driver sa tfd 2 - driver v cc i ref 6 23 sa tfd1 sa tref12 27 v sync12 28 dat a co ntrol v syncxy v buscxy sense & co ntro l logi c 6 v/11 v v sync34 15 v bus12 1 v bus34 14 22 sa tref34 20 sa tfd2 2 sa tfd 3 - driver sa tfd3 13 sa tfd 4 - driver protoc ol handler sa tfd4 agnd star t bits crc sensor status sensor dat a 16 21 dgnd 7 n. c. 26 n. c. hw status co mmunic ation status 17 tle 77 29 n. c. 3 test 12 ri n 24 clk 8 sa tsyn c 18 rxd3 11 rxd2 4 rxd1 25 sp i interf ac e mosi 9 cs 19 sck 10 miso 5 channel addres s p syst em status receiver dat a embedded diagnostic functions leakage detection to gnd and battery ground loss detection short to gnd and open detection at every reference pins
product brief h ow to reach us: http://www.infneon.com published by infneon technologies ag 81726 munich, germany ? infneon technologies ag 2006. all rights reserved. legal disclaimer the information given in this product brief shall in no event be regarded as a guarantee of conditions or characteristics (beschaffenheitsgarantie). with respect to any examples or hints given herein, any typical values stated herein and/or any informa - tion regarding the application of the device, infneon technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. information for further information on technology, delivery terms and conditions and prices please contact your nearest infneon technologies offce (www.infneon.com). warnings due to technical requirements components may contain dangerous substances. for information on the types in question please contact your nearest infneon technologies offce. infneon technologies components may only be used in life- support devices or systems with the express written approval of infneon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered. published by infneon technologies ag application examples (side impact) satric tm (tle77 29 ) f p p g p p g f f f sync sp i line 4 line 3 line 2 line 1 right door s a 1 b 1 c 1 c 2 b 2 b 3 b 4 a 2 airbag ec u b-pillar b-pillar a x : up-front sensors (a cce leration) b x : pressure sensors in doors c x : a cce leration sensor in b-pilla r le ft door s airbag ec u mc u product summary type sales code description package tl e 7729 available upon request 4 channel satellite receiver p-tssop-28 system overview tle 77 29 satric tm tle7718 tle7738 8 loop c rossav e tm tle7714 tle7734 4 loop c rossav e tm tle 77 29 satric tm i/o bu ck tle 6250 can tle 7259 lin safin g engine (x c866) p p p x y p g g g g g side impact front impact batter y right door high speed can safing signal s tle 6 711 passenger sensing side airbag door s cu rt ains bu ck bu ck v boost v ba t v sa t & v sync v lo gi c er front airbag bu ck le swit ch bu ck le swit ch passenge r dualstag e oc cupant dualstag e wa rning lamp airbag of f smar t powe r swit ch pedestrian protection bonnet le ft door sensor sp i firing sp i xc 16 4 mc u airbag ec u ordering no. b112- h 8941-x-x-7600 printed in germany ps 1106.5 nb
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