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this is information on a product in full production. march 2014 docid024648 rev 3 1/21 21 AIS1200PS mems acceleration sensor: single-axis with psi5 point-to-point interface datasheet - production data features ? 5 v to 16 v single supply operation ? 10-bit data output ? embedded voltage regulator ? embedded self-test ? asynchronous 2 wire connectivity ? psi5-a10p v1.3 compliant ? error detection: single bit even parity ? automotive aec-q100 qualified ? ecopack ? compliant ? extended temperature range: -40 c to +125 c applications ? airbag systems ? vibration, impact monitoring description the AIS1200PS is a peripheral acceleration sensor with a single-axis sensing element and an ic interface able to provide acceleration information to a master control unit through a manchester-coded protocol (125 kbps). the sensing element, capable of detecting the acceleration, is manufactured using a dedicated process developed by st to produce inertial sensors and actuators in silicon. the ic interface is manufactured using a bcd process that allows a high level of integration. the device is factory trimmed to better tune the sensing element characteristics with the acceleration information to be supplied. the AIS1200PS has a full scale of ? 200 g. the acquisition chain is made up of a c/v converter, a full-differential charge amplifier, a 2 nd order lpf with a cutoff frequency of 175 hz, and a second charge amplifier to adapt the dynamic range to an sar a/d converter. the differential capacitance of the sensor is proportional to the proof mass displacement; thus, by sensing the differential capacitance, the position of the sensor is determined. then, since the mass position is known and the position is related to the input acceleration, the input acceleration can be easily deduced. the device is available in a plastic soic package with 150 mils reverse frame forming for emc enhancement and is specified over a temperature range extending from -40 c to +125 c. 62,&1 table 1. device summary order code g -range operating temperature range [ ? c] package packing AIS1200PStr 200 g -40 to +125 soic 16n tape and reel www.st.com
contents AIS1200PS 2/21 docid024648 rev 3 contents 1 block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 soic 16n pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 control timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 sensor communication interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.4.1 physical layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.4.2 data link layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.4.3 data range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.4.4 initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.5 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.6 factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3 application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
docid024648 rev 3 3/21 AIS1200PS list of tables list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 3. mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 4. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 5. control timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 6. data mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 table 7. data content in initialization phase ii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 table 8. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 table 9. soic 16n mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 table 10. document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
list of figures AIS1200PS 4/21 docid024648 rev 3 list of figures figure 1. AIS1200PS block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. detectable accelerations and pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 figure 3. power-on-reset (por) operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 figure 4. bit encoding using supply current modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 5. frame example with 10 data bits (d0-d9), 2 start bits (s1,s2) and one parity bit (p). . . . . 11 figure 6. initialization of the sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 7. block id and data nibbles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 8. startup sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 9. AIS1200PS electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 10. soic 16n package drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
docid024648 rev 3 5/21 AIS1200PS block diagram and pin description 1 block diagram and pin description 1.1 block diagram figure 1. AIS1200PS block diagram 1.2 soic 16n pin description figure 2. detectable accelerations and pinout vreg clk sdo AIS1200PS sdi dr 1 16 reserved 9 x (top view) direction of the detectable accelerations - x at1 hcap busin rtn reserved at4 reserved at3 at2 8 sh gams290420131018fsr
block diagram and pin description AIS1200PS 6/21 docid024648 rev 3 table 2. pin description pin# name function 1 - lv (1) 1. lv (low voltage) pin: 4.5 v max absolute rating. vreg voltage regulator output. a ceramic capacitor of 1.0 ? f 40% must be connected to this pin, which should not be used to power up other devices. 2 - lv clk spi interface - connect to gnd. 3 - lv sdi spi interface - connect to gnd. 4 - lv sdo spi interface - driven to ?0? by the device. 5 - lv dr data ready - driven to ?0? by the device. 6 - lv cs spi chip select, connect to gnd. 7 - lv at1 analog port 1 - driven to ?0? by the device. 8 - lv at2 analog port 2 - driven to ?0? by the device. 9 - lv sh connect to gnd. 10 - lv at3 analog port 3 - driven to ?0? by the device. 11 - lv at4 analog port 4 - driven to ?0? by the device. 12 - lv reserved leave unconnected. 13 - lv reserved connect to gnd. 14 - hv (2) 2. hv (high voltage) pin: 20 v max absolute rating. rtn bus low side. 15 - hv busin bus high side. 16 - hv hcap an autarky ceramic capacitor of 0.047 ? f 50% must be connected to this pin.
docid024648 rev 3 7/21 AIS1200PS mechanical and electrical specifications 2 mechanical and electrical specifications 2.1 mechanical characteristics v dd ? 5 v to v dd ? 16 v, t l ? -40 c to t h ? 125 c, unless otherwise noted. 2.2 electrical characteristics t a ? -40c to t h ? 125 c, unless otherwise noted (a) table 3. mechanical characteristics symbol parameter test conditions min. typ. max. unit fs full-scale range (2) 200 g s o sensitivity 1.8 2 2.2 lsb/ g tcs o sensitivity change vs. temperature t a = 25c -5 5 % t l ? t a ? t h -10 10 off zero-g level offset (1) t a = 25c -26 0 26 lsb t l ? t a ? t h -54 0 54 nl non-linearity (2) best-fit straight line -2 +2 % fs asym asymmetry (2) -1.2 +1.2 % crax cross axis (2) -5 +5 % f 0 mems resonant frequency (2) 16.6 19.6 22.5 khz t op operating temperature range -40 +125 c 1. zero-g level offset (10-bit representation) including aging and soldering effects. 2. verified by characterization, not tested in production. a. all voltage levels are referred to rtn table 4. electrical characteristics symbol parameter test conditions min. typ. max. unit v bus supply voltage at busin 5 16 v i q quiescent current (1) 247ma i d drift of quiescent current (time gradient) (3) 1 ma/ min rng output range 200 g -400 400 lsb rng max output range before clamp -480 480 lsb out ff output frequency flatness 5 g @ freq 20, 30, 40 hz (2) -10 +10 % i s data sink current i q i q + ? i s ma ? t ? t ------- 0.5 ? c s ------ - ?
mechanical and electrical specifications AIS1200PS 8/21 docid024648 rev 3 figure 3. power-on-reset (por) operation (b) ? i s delta sink current 22 26 30 ma t r , t f current rise and fall times 20%...80% of ? i s 0.33 1 ? s v regout v reg output voltage c reg = 1.0 ? f, ceramic 3.1 3.3 3.5 v hv th busin reset threshold (3) rise 4.30 4.60 4.96 v fall 4.30 4.60 4.90 v lv th regout reset threshold (4) rise 2.65 2.85 3.05 v fall 2.62 2.85 3.05 v delta def deflection (self-test - offset) t = 25c (4) 52 61 72 lsb t l ? t a ? t h 52 61 154 lsb n noise max deviation from mean -4 +4 lsb t op operating temperature range -40 +125 c 1. over life and temperature. 2. verified by characterization, not tested in production. 3. see figure 3 . 4. without aging or stressing. b. whenever busin falls below hv th or vreg falls below lv th , the device will go into reset. table 4. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
docid024648 rev 3 9/21 AIS1200PS mechanical and electrical specifications 2.3 control timing table 5. control timing symbol parameter conditions (1) min typ max unit f c bessel filter cutoff frequency -3 db 157 175 193 hz att signal attenuation 1 khz -26 -20 db 2 khz -38 -35 f osc internal oscillator frequency 11.63 12.25 12.9 mhz t ref refresh period 212 224 236 ? s t bit bit duration 125 kbps 7.6 8 8.4 ? s dc duty cycle (t fall,80 - t rise,20 )/t bit (t fall,20 - t rise,80 )/t bit 47 50 53 % t delay signal processing time (2)(3) 1.31 ms t set settling time for quiescent current i = i q 2 ma 5 ms t reset recovery time after high- g shock (3) 10 ms t th undervoltage reset delay ramping busin from 16 v to 0 v over 2 ? s 200 ? s t rj microcut rejection time (3) ramping busin from 16 v to 0 v over 2 ? s 10 ? s 1. c reg = 1.0 ? f 40%, ceramic, c auth = 0.047 ? f 50%, ceramic. 2. bessel filter =1.24 ms, [sar a/d + c/v + gain] = 0.07 ms. 3. verified by characterization, not tested in production.
mechanical and electrical specifications AIS1200PS 10/21 docid024648 rev 3 2.4 sensor communication interface the AIS1200PS is a single-axis accelerometer with a psi5 v.1.3 asynchronous communication interface (psi5-a). psi5-a describes a point-to-point connection for unidirectional, asynchronous data transmission. the sensor is connected to the ecu by two wires. after switching on the power supply, the sensor starts transmitting data to the ecu periodically. timing and repetition rate of the data transmission are controlled by the sensor. 2.4.1 physical layer psi5 uses two wires for both power supplies to the sensors and data transmission. the ecu provides a preregulated voltage to the sensor. data transmission from the sensor to the ecu is done by current modulation on the power supply lines. current oscillations are damped by the ecu. bit encoding is done by a ?low? level (i s,low ) which is represented by the normal (quiescent) current consumption of the sensor(s); a ?high? level (i s,high ) which is generated by an increased current sink of the sensor (i s,low + ? i s ). the current modulation is detected within the receiver asic. figure 4. bit encoding using supply current modulation manchester coding is used for data transmission. a logic ?0? is represented by a rising slope and a logic ?1? by a falling slope of the current in the middle of t bit (125 kbps ? 8 s 5%). 2.4.2 data link layer each ais1200 psi5 data frame consists of 13 bits containing two start bits and one parity bit with even parity and 10 data bits. data bits are transmitted lsb first. the data frames are sent periodically from the sensor to the ecu at intervals t ref of 224 s (typ).
docid024648 rev 3 11/21 AIS1200PS mechanical and electrical specifications figure 5. frame example with 10 data bits (d0-d9), 2 start bits (s1,s2) and one parity bit (p). error detection by single bit even parity. * frame duration = 104 ? s 5% 2.4.3 data range psi5 data messages are divided into three separate ranges: a data range for the sensor output signal, a range for status and error messages and a range for initialization data. the decimal values ?480 to +480 are used for the sensor output signal. the range ?512 to ?481 is reserved for the block and data id?s which are used for transmitting initialization data during startup of the sensor (see section 2.5 ). the range from +481 to +511 is used for status and error messages. t ref
mechanical and electrical specifications AIS1200PS 12/21 docid024648 rev 3 table 6. data mapping dec hex description range +511 0x1ff reserved for ecu internal use (1) status & errors messages 2 : : reserved for ecu internal use (1) +504 0x1f8 ?memory fail? +503 0x1f7 reserved (2) +502 0x1f6 reserved (2) +501 0x1f5 reserved (2) +500 0x1f4 ?sensor defect? +499 0x1f3 reserved for ecu internal use (1) : reserved for ecu internal use (1) +496 0x1f0 reserved for ecu internal use (1) +495 0x1ef reserved (2) : : reserved (2) +489 0x1e9 reserved (2) +488 0x1e8 ?sensor busy? +487 0x1e7 ?sensor ready? +486 0x1e6 reserved (2) +485 0x1e5 reserved (2) +484 0x1e4 reserved (2) +483 0x1e3 reserved (2) +482 0x1e2 reserved (2) +481 0x1e1 reserved (2) +480 0x1e0 maximum positive sensor signal sensor output signal 1 : : intermediate positive sensor signal values 0 0x000 signal amplitude ?0? : : intermediate negative sensor signal values -480 0x220 maximum negative sensor signal -481 0x21f status data 1111 block ids and data for initialization 3 ::: -496 0x210 status data 0000 -497 0x20f block id 16 : -512 0x200 block id 1 1. usage for ecu internal purposes is possible (e.g. ?no data?, ?manchester error? etc.) 2. not to be used.
docid024648 rev 3 13/21 AIS1200PS mechanical and electrical specifications 2.4.4 initialization after each power-on or undervoltage reset, the sensor performs an internal initialization which is divided into three phases. figure 6. initialization of the sensor id blocks and data blocks are sent in an alternating sequence, 3 times each. the block identifiers are used for numbering of the following data nibbles. after any power-on or undervoltage reset, the internal logic starts up with an initialization program. during the first initialization phase, no data is transmitted and the ecu can perform a connectivity test. during the second initialization phase, the sensor transmits sensor and application-specific information to the ecu. during the third initialization phase, the sensor transmits ?sensor ready?, ?sensor defect? or other optional status data. if the sensor is defective, it will continue to send the ?sensor defect? messages and other optional status data until it is powered off. the sensor status information must consist of data words out of data range 2 and 3. usage of sensor output signal data words out of data range 1 is not allowed during initialization phases ii and iii. if the initialization is finished successfully, the sensor goes into run mode and starts transmitting sensor signal data or optional status data until it is switched off or an internal error is detected. in the AIS1200PS, phase 1 has a typical duration of 121 ms, and phase 2 of 43 ms. phase 3 duration may vary, depending on the number of iterations needed to pass the self-test routine. if the self-test fails, the self-test routine is repeated until it passes, up to 5 times. if the self- test does not pass after 5 attempts, it will transmit a message of sensor failure. after phase 3 is passed successfully, the sensor goes into run mode and starts transmitting sensor signal data. the actual duration of all phases depends on the oscillator period, which has a tolerance of 5% (see table 5 ). for the AIS1200PS device, k = 3 121ms 448 ? s 43ms
mechanical and electrical specifications AIS1200PS 14/21 docid024648 rev 3 the following is the sequence of steps during the initialization phases, along with the approximate durations (all numbers are intended as typical values): ? step 1 . after por, the flash download begins and ends typically in 23 ms. ? step 2 . there is a waiting period of 16 ms after the flash is downloaded. ? step 3 . the self-test starts at 39 ms and ends at 117 ms, provided it passes the first iteration. ? step 4 . if the self-test fails the first iteration, then second self-test will begin. ? step 5 . each additional self-test operation requires 75 ms. ? step 6 . if the 5 th iteration of self-test fails, then the psi5 protocol will transmit a ? sensor defect ? code during phase 3. the psi5 transmission sequence is accordingly the following: ? p1 . phase 1 ends at 121 ms (it varies with the oscillator frequency tolerance, as indicated previously). ? p2 . phase 2 starts after phase 1 and ends at 164 ms. ? p3 . phase 3 starts after phase 2 and transmits the ? sensor ready ? code twice (i.e. 448 ? s), then the adc transmission begins. the start of the adc transmission, however, is gated by step 4 above. if the self-test goes to the 2 nd iteration and beyond, then the psi5 will transmit the ? sensor busy ? code during phase 3 until either the self-test passes, at which point the ?sensor ready? code will be transmitted once followed by the adc data, or the self-test fails, in which case phase 3 will transmit the ? sensor defect ? code. the memory test is done during the flash download phase (0 ms-23 ms). if the memory crc error/parity error occurs during this phase, then a ? memory fail ? code will be transmitted during phase 3. the psi5 codes transmitted during these phases are: ? sensor ready: 0x1e7 ? sensor busy: 0x1e8 ? sensor defect: 0x1f4 ? memory fail: 0x1f8 figure 7. block id and data nibbles
docid024648 rev 3 15/21 AIS1200PS mechanical and electrical specifications figure 8. startup sequence a special data format and a reserved data range are used during initialization in order to avoid a possible mix-up with sensor signal data. ?data range 3? contains 16 block identifiers and 4-bit data nibbles (see section 2.4.3 ). if the initialization data exceeds 4x16 = 64 bits (more than 36-bits of sensor specific information), data can be paged. the id codes are reused for every 64-bit page of data to be transmitted. data pages are not numbered. mapping of the information contained in different data pages has to be derived from the chronology of the startup sequence. it is not mandatory to transmit complete data pages. the initialization data is based on a 10-bit data word length (see section 2.4.3 ). the initialization data contains the following information: ? psi protocol revision ? total number of data blocks (nibbles) transmitted during initialization ? manufacturer code ? sensor type ? sensor and application specific information table 7. data content in initialization phase ii field name parameter value f1 (d1) protocol description psi5 v1.3 0100 f2 (d2, d3) number of data blocks 32 nibbles 0010 0000 f3 (d4, d5) sensor manufacturer code stmicroelectronics 1001 0011 f4 (d6, d7) sensor type high-g accelerometer 0000 0001 f5 (d8, d9) sensor parameter sensitivity: 2 lsb/g 0000 1001 f6 (d10-d11) sensor code (sensor) customer defined f7 (d12-d14) sensor code (vehicle) customer defined f8 (d15-d18) production date (1) 1. this field contains the back-end assembly date. it contains 16 bits of data and is encoded as year-month- day. the year code is a two-digit code. in terms of bits, the sequence is yyyy yyym mmmd dddd. f9 (d19-d32) serial information (2) 2. this field contains a specific product serial number. it originates from both the back-end lot number and the asic wafer number and die location on the wafer. each part contains a unique number. for the AIS1200PS device, k = 3
mechanical and electrical specifications AIS1200PS 16/21 docid024648 rev 3 in normal operation mode, the sensor transmits sensor output data in data range 1. a special ?diagnostic mode? is foreseen for testing and failure analysis. in the diagnostic mode, the sensor may send other than the specified sensor output data in data range 1. the condition for entering the diagnostic mode is the recognition of a valid ?xlong? data frame during initialization phase ii. the sensor indicates the diagnostic mode by sending the ?sensor in diagnostic mode? identifier during initialization phase iii, see section 2.4.3 . 2.5 absolute maximum ratings stresses above those listed as absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device under these conditions is not implied. exposure to maximum rating conditions for extended periods may affect device reliability. this device is sensitive to mechanical shock, improper handling can cause permanent damage to the part this device is sensitive to electrostatic discharge (esd), improper handling can cause permanent damage to the part 2.6 factory calibration the ic interface is factory calibrated for sensitivity (so) and zero- g level (off). the trimming values are stored inside the device in a non-volatile structure. any time the device is turned on, the trimming parameters are downloaded into the registers to be employed during normal operation. this allows the user to employ the device without further calibration. table 8. absolute maximum ratings symbol parameter value unit v bus supply voltage (1) 1. voltage referred to rtn. -0.3 to 16 v i max busin input current 1.7 a a max max acceleration before mechanical stops 3500 to 4000 g a unp mechanical shock with device unpowered 2000 g h drop drop shock survivability 1.2 m esd esd protection hbm (low-voltage pins) 2 kv esd protection hbm (high-voltage pins) 4 kv cdm (corner pins) 750 v cdm (inside pins) 500 v mm 100 v t stg storage temperature range -40 to 125 c t j junction temperature range -40 to 125 c
docid024648 rev 3 17/21 AIS1200PS application hints 3 application hints figure 9. AIS1200PS electrical connections note: both c reg and c auth are mandatory for correct usage of the device. c auth 1 16 AIS1200PS 8 9 (top view) rtn bus hcap c reg regout x - x direction of the detectable accelerations to ecu gnd c reg = 1 . 0 f (ceramic, 40%) c auth = 0.047 f (ceramic, 50%) gams290420131040fsr
package information AIS1200PS 18/21 docid024648 rev 3 4 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack? packages, depending on their level of environmental compliance. ecopack? specifications, grade definitions and product status are available at: www .st.com . ecopack is an st trademark. table 9. soic 16n mechanical data dim. mm. min. typ. max. a 1.55 1.63 1.73 a1 0.127 0.15 0.25 a2 1.40 1.47 1.55 b 0.35 0.41 0.49 c 0.19 0.20 0.25 d 9.80 9.93 9.98 e1 3.81 3.94 3.99 e 1.27 bsc e 5.84 5.99 6.20 h 0.25 0.33 0.41 l 0.41 0.64 0.89 ? 0 5 8 x 2.16 2.36 2.54
docid024648 rev 3 19/21 AIS1200PS package information figure 10. soic 16n package drawing 8298989_a
revision history AIS1200PS 20/21 docid024648 rev 3 5 revision history table 10. document revision history date revision changes 16-may-2013 1 first issue. 22-may-2013 2 document status promoted from preliminary to production data. 04-mar-2014 3 updated table 1: device summary ; minor textual updates.
docid024648 rev 3 21/21 AIS1200PS please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. a ll st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a particular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. st products are not designed or authorized for use in: (a) safety critical applications such as life supporting, active implanted devices or systems with product functional safety requirements; (b) aeronautic applications; (c) automotive applications or environments, and/or (d) aerospace applications or environments. where st products are not designed for such use, the purchaser shall use products at purchaser?s sole risk, even if st has been informed in writing of such usage, unless a product is expressly designated by st as being intended for ?automotive, automotive safety or medical? industr y domains according to st product design specifications. products formally escc, qml or jan qualified are deemed suitable for use in aerospace by the corresponding governmental agency. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2014 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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