Animal (ISO 11784/-85 compliant), Access Control, Smart products, Self
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128bit EEPROM code 125kHz Read/Write Transponder Same reading range state Read Only transponders. EEPROM programmable encoding data rate options EEPROM programmable write protection levels Integrated tuning capacitance Single command programming with integrity check. Small size ISO-chipcard, without need module. Available with without Goldbumps (MEGAPADS)
Animal (ISO 11784/-85 compliant), Access Control, Smart products, Self reconfiguring equipment, Self calibrating products, Product Authentication, Asset Protection,
Ordering Information
Part MLX90124 Temperature Suffix (0°C 70°C) (-40°C 85°C) Package Code (TO-92) UF(*) (Die sawn blue foil) UG(*) (Gold bumped sawn blue foil) UH(*) (Gold bumped tape reel) (Die tape reel)
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Description Functional Diagram
MLX90124 128bit Read Write transponder operating 125kHz range. been designed cost read write solution applications that require high flexibility terms write range. Requiring only external coil added, comes with 250pF integrated tune capacitor with MEGAPADS option established assembly methods. also small enough integrated smart cards without requiring expensive transponder module. Clock power supply taken from electromagnetic field. resistor switched parallel parallel resonant LC-circuit amplitude modulate electromagnetic field. EEPROM configured words bits. Words form continuously read during normal operation. transponder configured Manchester Biphase encoding, kBaud EEPROM programming word. setting other bits word, transponder memory either completely locked, password protected limited access. first case becomes 128bit Read Only transponder. Thanks power consumption, strong modulation signal, performs very well applications requiring maximum reading distance like animal ISO.
90124
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TABLE CONTENTS
Features. Applications. Ordering Information. MLX90124 Electrical Specifications General Description. Power level Sensitivity level Clock recovery Demodulator limiter, clamping Modulator. EEPROM Memory organization. OPERATING MODES Read Modes 1.8.1 NORMAL READ MODE: 1.8.2 CRITICAL READ MODE:.6 Write Modes (WP=0). 1.9.1 PROGRAMMING MODE: 1.10 Unprotected Write (UW) mode (WP=0,PP=0) 1.10.1 Programming cycle.7 1.10.2 Purpose UW.7 1.10.3 Applications mode:.7 1.11 Password Protected Write (PP) mode (WP=0, PP=1) 1.11.1 Compare cycle 1.11.2 Applications mode:.8 1.12 Read Only (RO) Mode (WP=1, PP=x) Data encoding schemes 1.13 Manchester 1.14 Biphase. Timing specification 1.15 Asynchronous Control Pattern (ACP) 1.16 Start (SB) 1.17 Data bits reception 1.18 Erase write phases. Flow Chart. Unique Features Cross Reference. Absolute Maximum Ratings Precautions Package Information. 1.19 Dimensions with MEGAPADS 1.20 Dimensions without MEGAPADS 1.21 Blistertape. 1.22 flat TO92 (UA) Reliability Information Disclaimer
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MLX90124 Electrical Specifications
Units Critical reading Tstore=25oC Critical reading Toper=25oC, Vdut 1Vpp Toper=25oC, Vdut 1Vpp 100k -2.5% mVpp year cycles
Operating Parameters based test (see Schematic below). ToperC 70°C, ToperE -40°C 85°C (unless otherwise specified) Parameter Symbol Test Conditions Sensitivity level Vacsens Vac, Continuous normal reading VDUT 200mVpp (Weak power) VDUT 200mVpp (Weak power) VDUT 6Vpp (Medium power) VDUT 6Vpp (Medium power)
Transponder Modulation Depth VWeakModL VWeakModH VMedModL VMedModH 2kbaud Programming voltage Vpr2low threshold 4kbaud Programming voltage Vpr4low threshold EEPROM data retention EEPROM write cycles Tret Ncycle
Coil-GND tune capacitor Ctune_Trim delivery forms Coil-GND tune capacitor bumped Intra spread Dynamic tune capacitor
Ctune_nt_mean
Ctune_nt_spread Toper=25oC, Vdut 1Vpp Ctune_dyn
IclampLow IclampHigh Toper=25oC, Vdut 6Vpp Toper=25oC, Vdut 10Vpp
2.5%
input current clamping
VdutDC VdutDC
Notes:
Note (1): specification values tested 100%, guaranteed design. Note (2): specifications valid Manchester Biphase encoding, 2kbaud 4kbaud data rate options. Note (3): signals sinusoidal. Note (4): VweakModL_Min minimum voltage coil input pins (VDUTmin) which code guaranteed correct. Note (5): package tune capacitor fixed mean value with tight tolerance +/-2%. goldbumped delivery form mean value tune capacitor fixed with production lot,but vary +/-20% between lots. statistical spread within (+/-50k pcs) +/-2.5%. instance range mean value tune capacitance values within production range [268: 282]pF. Temperature shift typically -0.5% from -40°C, 85°C.
L=6.8mH, Q=80 @120kHz
COIL Cpar=30pF Ctune 90124
Vdut
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Block diagram
COIL Ctune Limiter Modulator
SPEED Digital Controller
Cbuffer
CLOCK RECOVERY DEMODUL.
CLOCK
ADDR DATA DATA
EEPROM
SUPPLY
EEPROM memory
FUNCTION
ADDRESS
BITPOSITION (LSB first)
Options SPEED CODE Page (RW)
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General Description
Demodulator
external field modulated according asynchronous control pattern (ACP, below), transponder stops transmitting 128bit enters Program Mode. transitions detected using fixed threshold level. This threshold vary process variation between values programming level (Vpr). While transponder modulating sample taken each period just before modulation resistor switched After ACP, transponder synchronizes sampling point with falling edge start (SB). each additional 16bit word that sent, 90124 resynchronizes that sent before actual word (see timing specification below). Note:
requirements limit write distance typically when applied with small reader coil where field varies rapidly over distance. bigger reader coil diameter will relax these constraints.
MLX90124 128bit Read-Write transponder fixed distance writing. integrated tune capacitance external coil form resonant antenna that absorbs part electromagnetic energy radiated transceiver antenna. Physically, magnetic coupling occurs between transceiver, also referred "reader", transponder antennas. amplitude modulate (AM) carrier, transponder damps electromagnetic field switching resistor parallel with coil. This transponder repetitively transmits 128bit-identification code (ID) transceiver, which recovers envelope damped field, decodes transceiver send commands data transponder modulating amplitude carrier.
Power level
When transponder placed external radio frequency (RF) field appropriate frequency amplitude, internal power supply (VDD) build charge integrated buffer capacitance. modulation resistor switched soon reached Power Reset (VPOR) level. When modulation resistor switched survives energy stored internal capacitance. insufficient energy stored, drop below VPOR, which point transponder will stop modulating code. Hence, just beyond maximum operating distance transponder modulates more less random way, reader recover correct code.
limiter, clamping
build voltage resonant circuit limited avoid damaging internal circuit. This causes transponder drop higher fields.
Modulator
modulator consists modulation resistor that switched parallel with resonant circuit (antenna). Because weak fields rising edge much slower than falling edge envelope, symmetrically driven modulator would give asymmetrical envelope. This anticipated delaying each falling edge fixed number clock pulses. Each state reduced clocks kBaud mode, each state prolonged same amount. Speed Total clocks 2kbaud 4kbaud Clocks `ON' state Long Short Long Short Clocks `OFF' state Long Short Long Short
Sensitivity level
minimum electromagnetic force (e.m.f.) needed guarantee correct code transmission defined VDUTmin. this level power supply will drop below level while modulation resistance switched during modulation, even long series short high periods.
Clock recovery
transponder takes clock from carrier frequency. Depending speed option, carrier frequency divided 32(4kbaud), 64(2kbaud) generate rate.
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EEPROM Memory organization
EEPROM memory arranged words bits each (see memory above). Each these words individually programmable. IDENTIFICATION WORDS (Addresses first words hold 128bits identification code (ID). CONFIGURATION WORD (Address word contains: SPEED (bit 0:LSB) Speed defines internal clock extraction: divided divided CODE (bit Code defines will encoded Manchester (set Biphase (set amplitude modulation scheme. (bit Write Protect locks complete EEPROM, including configuration bits (SPEED, CODE). Read Only Operating Mode (bit Password Protection locks first words. Write Operating Mode. WP=1, value relevant (don't care). remaining bits used (don't care). SPEED CLOCK Freq/64 Freq/32 BAUD RATE 2kbaud 4kbaud
OPERATING MODES
After Power Reset (POR) device starts amplitude modulate (AM) electro-magnetic field. modulation sequence based data stored identification configuration words. behavior transponder fixed POR, depending options configuration word. change this behavior configuration word rewritten, removed from field allow sequence. Depending configuration bits basic operating modes possible: OPERATING MODE Unprotected Write Password Protected Write Read Only
Read Modes
1.8.1 NORMAL READ MODE: MLX90124 starts transmit data soon picks enough magnetic energy. mode (see Write modes more explanation different write modes) transmits code. mode transmits full 144bits, including ninth (configuration) word. data transmitted using normal threshold reading E2PROM. 1.8.2 CRITICAL READ MODE: 'critical' read mode, MLX90124 reads nine 16bit words (=144bit, also configuration word transmitted). special feature this mode that data read from E2PROM using extreme threshold E2PROM reading window: 144bits critical low, 144bits critical high, 144bits critical low, Therefore when successive readings full 144bits identical transmitted values, well written data retention guaranteed specified (See table with Electrical Specifications above). critical readings show difference, device been programmed marginally. should then reprogrammed. TIP: coil voltage least Vprxhigh guaranteed during erase phase write phase programming cycle, sufficient energy available allow correct operation EEPROM. programming failures still possible noise etc. Therefore always recommended verify reprogrammed words after each programming sequence before removing transponder from field. Once critical read latch set, only reset removing transponder from field.
CODE
ENCODING Biphase Manchester
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Write Modes (WP=0)
When Write Protect (WP=0), MLX90124 will stop modulating enter programming mode when external field Amplitude Modulated with Asynchronous Control Pattern (ACP) (See `Timing Specification' below). This implies that when MLX90124 experiences increasing electromagnetic field, instance approaching reader antenna, transponder stop modulating during 64bit period: programming cycle wait delay (TWD), below. This apparent `modulation gap' will occur point where coil voltage reaches Threshold level. MLX90124 different Write modes, which same program mode critical read mode applicable. 1.9.1 PROGRAMMING MODE: data that transmitted reader encoded: sample higher than interpreted below `Timing Specification' below detailed information MLX90124 samples coil voltage. When MLX90124 detected address counter reset (=0), transponder waits start (SB) during Watchdog Delay period (TWD) synchronize sampling first 16bit word with reader. Depending write mode value address counter either compare cycle program cycle executed. After each cycle address counter incremented, started. MLX90124 resynchronizes each subsequent cycle. received within TWD, MLX90124 will leave programming mode. After execution ninth cycle, programming mode left immediately. programming interrupted after each cycle. When transponder leaves program mode enters critical read mode. exception made, namely when transponder critical read mode, programming cycle interrupted before address counter been Since this indicates that transponder falsely detected ACP, and/or password wrong.
Unprotected Write mode transponder reacts directly detection starting first programming cycle: Initiate address counter [address=0] when detecting first startbit Sample bits Erase Write EEPROM content [address=0] wait next increment address counter. modulation field that interpreted followed will lead erasure first word. 1.10.2 PURPOSE Therefore mode should only used write words under well known circumstances, like dedicated production environment. word appropriate bits have such that transponder goes into required mode avoid erroneous erasure. Since address counter higher than data transmitted critical read mode. words transmitted, allow verification configuration word before power down. Even been set, possible errors detected critical read mode still corrected guarantee correct programming before removing from field, locking forever. 1.10.3 APPLICATIONS MODE: Prepare mode: mode typically used so-called WORM (Write Once, Read Many times) applications where custom unique code written assembled transponders before shipping them customer, will Read Only mode. Prepare mode: prepare transponders field application mode, unique identification code, calibration value, production dat, batch number, etc. locked first words. last words then used store change data field application. transponders also recycled mode, resetting word. This allows even change first words needed.
1.10 Unprotected Write (UW) mode (WP=0,PP=0)
1.10.1 PROGRAMMING CYCLE Each Programming cycle consists (See `Timing Specification' below) startbit (SB) Sampling 16bits 16bit Erase phase word indicated address counter Write phase 16bits into erased word.
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1.11 Password Protected Write (PP) mode (WP=0, PP=1)
1.11.1 COMPARE CYCLE Protected Write mode first four words cannot changed. transponder will these first four words password avoid hazardous erase rest words that rewritten. Each compare cycle consists startbit (SB) Sampling 16bits dummy 16bit period compare 16bit word with word indicated address counter. This word serves password, difference detected, MLX90124 immediately leaves program mode. typical write sequence mode reader will subsequently Learn 64bit password reading full 128bit transponder code retrieving header Transmit followed compare cycles. After successfully going through these compare cycles MLX90124 will execute programming cycle sequence next words. example word [address=6] written, words address have rewritten! before writing updated word [address=6]. This means also words addresses have verified critical read mode. soon detected determined time slot transponder goes into critical read mode. Remark that reader there difference protocol between programming cycle compare cycle 1.11.2 APPLICATIONS MODE: Mixed with After mode words from transmitted. Therefore used together with transponders that have been Read Only mode. Even though four compare cycles prevent hazardous erase, that transponder detects ACP, hence stops modulating, until timeout stopped (see `Write modes' above). This acceptable suitable field conditions applied, when this effect detected software. application requires transponder readable always under field conditions, recommended transponder Read Only mode.
Carrousel application: reliably write MLX90124 field strength should well controlled. This typically requires guaranteed coupling between transponder coil reader coil. When incorporated items that used carrousel- jukebox-like environment, mechanical dimensions often provide sufficient constraints guarantee required coupling factor. write areas specific conditions individual items stored their evolves time. Sweep field strength: When coupling factor guaranteed, reader detect corresponding field strength reaching Vpr. Before starting programming sequence reader sweep field strength, instance with driven antenna, until modulation transponders been detected. Remark that magnetic field strength change third order distance between reader coil depending antenna sizes. Typically magnetic field strength generated larger reader antennas evolves slower over distance, allow more gradual sweep. This feature allows programming MLX90124 under circumstance. smaller antennas small amplitude modulation superposed sweep field strength improve effectiveness sweep.
1.12 Read Only (RO) Mode (WP=1, PP=x)
Write Protect (WP=1), device will react modulation reader antenna. behaves like regular Read Only (RO) transponder, continuously transmitting 128bit from first words. typical application animal ISO11784/11785 standard which transponder 4kbaud, biphase encoding. Thanks WORM feature lead times kept very short.
header sequence that known reader, order allow find start code cyclical evolution pattern. always should guarantee that this pattern only occurs once code. 3901090124 Rev. Page Aug/02
Biphase Code Binary Data Memory Output Modulation Output
Manchester Code Binary Data Memory Output Modulation Output
Data encoding schemes
Biphase Manchester Amplitude Modulation encoding schemes, which rely build voltage transponder resonant circuit during certain period, defined baudrate.
guarantee good detection transients, they should more than Ttrans apart seen transponder. total transients should realized less than 32bits, which watchdog reset time (TWD). Therefore recommended duration Trans 2bits Ttrans 8bits make sure clean first transient detected, recommended apply Coil Voltage larger than Vprmax least 32bits (TWD) prior start ACP. Otherwise first transient considered such, second even start bit. make sure transponder detects last rising edge, field should remain high least Ttrans, also respecting watchdog time (TWD) complete ACP. start (SB) detected within periods (TWD) after last rising edge been detected, time will occur transponder will leave program mode. operating modes correct flow time out. Hint: soon second rising transition been detected transponder will immediately stop modulating which reflects transition program mode.
1.13 Manchester
bit, there transition from middle period. Reciprocal, logic there transition from middle period.
1.14 Biphase
beginning each bit, transition will occur. logic will keep state whole duration logic will show transition middle duration.
Timing specification
1.15 Asynchronous Control Pattern (ACP)
pattern sent reader transponder without synchronization between both. signals transponder prepare programming sequence. When MLX90124 detects will into program mode stop transmitting. consists transitions transponder coil voltage over Programming voltage level (Vpr). vary over population IC's between Vprmin Vprmax. Therefore modulation reader antenna should enough guarantee that transponder coil voltage modulates from below Vprmin above Vprmax. paragraph Write Modes some practical hints circumventing this limitation with good system design.
1.16 Start (SB)
first falling edge MLX90124 sees coil voltage after entered program mode used reference synchronizing sampling position data bits. This first falling edge referred start (SB), even though only synchronization pulse. possible optimize sampling position reducing pulse width. Mind that making pulse longer than 1bit cause it's first bit!
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1.17 Data bits reception
first sample sample bit) taken exactly period, casu 64(32) periods 2(4) kbaud, after detected falling (synchronizing) edge start bit. second sample taken exactly periods after synchronizing edge, etc. between sampling position, MLX90124 disregards change amplitude coil voltage. This interesting programming with Return-ToOne (RTO) coding reader requires this.
1.18 Erase write phases
After samples have been taken, program cycle completed with periods which word erased written with sampled data. state address counter determines which word erased written. This counter reset when received, incremented after each word. Make sure keep coil voltage higher than Vprhigh during this period, guarantee successful erase write. total 48bits after detection synchronizing edge watchdog delay monitored. within falling edge detected, this will used synchronizing edge following cycle. summary timings calculated based formulas below.
Data sent transponder timing specification periods.
Treset (TWD) Ttrans TACP 8<TACP<32 Start Treceive Terase Twrite Watchdog Treceive Terase Twrite
Transponder mode/operations
Normal Read with reception: RECEIVE ERASE WRITE RECEIVE DATA ERASE WORD WRITE WORD Vcoil>Vprmax Stop modulation detection DATA WORD(**) WORD(**) time start compare mode received data immediately compared password verification. (**) compare mode MLX90124 just waiting so-called dummy state, erase write executed.
MLX90124 Timing Specifications (carrier: Freq=125kHz, Tclk=8µs) Treceive Speed period Terase Twrite Tclk Tclk*1024 Freq (2kbaud) Freq (4kbaud) 512us 256us 8.912ms 4.096ms
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Bits
Ttrans
Ttrans
Ttrans
Ttrans Bits
Bits
Tacp< Bits
>Watchdog reset time
detection
Data reception password check)
Bits
Bits Writing word (n++)
Bits
Waiting start
Bits Data reception
Data reception
Erasing word
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Flow Chart
Upon entering field, transponder "sees" increasing amplitude voltage between COIL pins. passes through sequence. Depending configuration bits will enter appropriate mode.
WP=0?
Read Only Mode
RW=0?
Unprotected Write Mode
Password Protected Write Mode
detected? detected?
Stop modulating Reset address counter
Stop modulating Reset address counter
address counter<4 Password fail Time out?
Time out?
Receive words
Receive words
Critical Read latch
address counter>4
Write address
address counter>4
Timeout, address counter Password fail Time out? address counter<4 Critical Read, Protected Write detected? Stop modulating Reset address counter Receive words
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rewrite full 128bit once mode? order rewrite also first 64bits, have through mode, follows: Step Read code find first 64bits. Step Write ninth word reset using 64bit password. MLX90124 mode. Step Write full 128bit data, PP-bit back Take special care move change field before PP-bit been back order avoid erroneous erase. many bits have available store information, guarantee data integrity? Melexis proposes following configuration E2PROM that offers 88data bits. 7bit ASCII character, this about 12characters. order find first bit, unique string bits, which called header, guaranteed. Unique Header (same ISO11784): string containing zeroes followed stuff with value after each Byte data. guarantee data integrity, part E2PROM used store stored data. data integrity separate 8bit checks recommended. first calculated over DATA_0 DATA_5. This covers first 64bit E2PROM. second calculated over remaining DATA_6 DATA_10. polynomial 0x1DB: P(x) with: Data stream always first shift register initialized 16bits zero BITPOSITION (LSB first) DATA_9 CRC1[0,5] Header: 00000000001 DATA_0 DATA_0 CRC2[6,10] DATA_10 DATA_8 DATA_6 DATA_1 DATA_3 DATA_5 DATA_7 DATA_9 Page DATA_2 DATA_2 DATA_4
what configuration MLX90124 available, change configuration MLX90124? default MLX90124 delivered mode with 4kbaud, biphase configuration Depending delivery form data E2PROM configured different way. TO92 package E2PROM configured according ISO11784/11785, with country code 999, idnr naked E2PROM configured described FAQ. 88bit DATA 0x00112233445566778899AA
order change this data configuration, programmer able read data 4kbaud, biphase, recover 64bit password. Write correct datasequence. verify (critical read) changes 4kbaud, biphase. After Power sequence, MLX90124 will transmit updated 128bit configuration.
fast MLX90124 reprogrammed? default MLX90124 delivered 4kbaud mode. best-case assumption microcontroller calculation time neglected following overview table: Fres 1bit @4kBaud 0.256 (9bit) 16bit word: receive+erase+write 49bit Read 128bit find first 64bits ~128bit Reset PP-bit ACP+9*16bit word Wait before rewrite 32bit Write contents PP-bit ACP+9*16bit word Critical read 2*144bit TOTAL 2kbaud configuration, timing would double. When programming program first word, subsequent words seem have shifted? Probably timing watchdog time been respected before starting ACP. Make sure wait specified 32bit. Aug/02
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Unique Flexible configuration. Simple fast programming. State reading distance. Ideal flexible stock management devices, Animal Designed used Smart cards, without need costly modules.
Package Information
1.19 Dimensions with MEGAPADS
287.5+/-5 185+/-5 287.5+/-5
Absolute Maximum Ratings
Maximum current forced between coil ground (Icoilmax) Operating Frequency (Freq) Consumer (-Cxx) Operating Temperature (ToperC) Automotive (-Exx) Operating Temperature (ToperE) Maximum Storage Temperature TO92 (Tstore) Electrostatic discharge (HBM) coil (Vesdcoil) 30mA 150kHz 70°C 85°C 125°C 500V
Bump Height: 17um 1100um +/-10um
1525+/-5
This product replace modulating transponder 120kHz range. extends flexibility transponder, offers cheapest solution Read Write transponder, which needs programmed only once limited number times.
Thickness: 280um 10um
Precautions
Electronic semiconductor products sensitive Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
1.20 Dimensions without MEGAPADS
287.5+/-5
195+/-5
287.5+/-5
2120 10um
Cross Reference
1100um +/-10um
1535+/-5
Thickness: 280um 10um
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2120 10um
1.21 Blistertape
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1.22 flat TO92 (UA)
Marking 24AA: mask version (901)24AA lotnr reference year (200Y) week year dimensions Package dimensions exclude molding flash bend within from lead package interface.
1.40 1.60
3.90 4.30
2.34 2.64
0.63 0.84
24CA XYWW
0.43 0.48
2.80 3.20
1.55 1.75
0.38
0.00 0.20
10.0 11.0
1.24 1.30 2.51 2.57 0.35 0.41
0.35 0.41
Name COIL n.c.
Function Coil connection connected Coil connection ground connection
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Reliability Information
Melexis devices classified qualified regarding suitability infrared, vapor phase wave soldering with usual (63/37 SnPb-) solder (melting point 183degC). following test methods applied: IPC/JEDEC J-STD-020A (issue April 1999) Moisture/Reflow Sensitivity Classification Nonhermetic Solid State Surface Mount Devices CECC00802 (issue 1994) Standard Method Specification Surface Mounting Components (SMDs) Assessed Quality Method 2003 JEDEC-STD-22 Test Method B102 Solderability soldering technologies deviating from above mentioned standard conditions (regarding peak temperature, temperature gradient, temperature profile etc) additional classification qualification tests have agreed upon with Melexis. application Wave Soldering SMD's allowed only after consulting Melexis regarding assurance adhesive strength between device board. more information manufacturability/solderability quality page website: http://www.melexis.com/
Disclaimer
Devices sold Melexis covered warranty patent indemnification provisions appearing Term Sale. Melexis makes warranty, express, statutory, implied, description regarding information forth herein regarding freedom described devices from patent infringement. Melexis reserves right change specifications prices time without notice. Therefore, prior designing this product into system, necessary check with Melexis current information. This product intended normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, high reliability applications, such military, medical life-support life-sustaining equipment specifically recommended without additional processing Melexis each application. information furnished Melexis believed correct accurate. However, Melexis shall liable recipient third party damages, including limited personal injury, property damage, loss profits, loss use, interrupt business indirect, special incidental consequential damages, kind, connection with arising furnishing, performance technical data herein. obligation liability recipient third party shall arise flow Melexis' rendering technical other services. 2002 Melexis rights reserved.
latest version this document, website
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Phone: 670495 E-mail: sales_europe@melexis.com
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QS9000, VDA6.1 ISO14001 Certified
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