840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 1 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement g eneral d escription the ics840-125 is a gigabit ethernet oscillator replacement and a member of the hiperclocks tm family of high performance devices from ics. the ics840-125 uses a 25mhz crystal to synthesize 125mhz. the ics840-125 has excellent jitter performance. the ics840-125 is packaged in a small 8-pin tssop, making it ideal for use in systems with limited board space. f eatures ? one lvcmos/lvttl output, 15 output impedance ? crystal oscillator interface designed for 25mhz, 18pf parallel resonant crystal ? output frequency: 125mhz ? random jitter: 3.7ps (typical) ? deterministic jitter: 0.1ps (typical) ? 3.3v operating supply ? 0c to 70c ambient operating temperature ? available in both standard and lead-free rohs-compliant packages hiperclocks? ics b lock d iagram p in a ssignment clock synthesizer xtal_in xtal_out oe q pullup 25mhz 125mhz ics840-125 8-lead tssop 4.40mm x 3.0mm x 0.925mm package body g package top view ics840-125 8-lead soic 3.90mm x 4.92mm x 1.37mm body package m package top view 1 2 3 4 8 7 6 5 v dd xtal_out xtal_in oe nc q v ddo gnd
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 2 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement t able 1. p in d escriptions t able 2. p in c haracteristics t able 3. c onrol f unction t able lobmy sr etemara ps noitidnoctse tm umini ml acipy tm umixa ms tinu c ni ecnaticapactupni 4f p r pullup rotsiserpulluptupni 1 5k r tuo ecnadepmituptuo 51 stupnilortno ct uptuo e oq 0z -ih 1e vitca rebmu ne ma ne py tn oitpircsed 1v dd rewo p. nipylppusrewop 3,2 ,tuo_latx ni_latx tupni ,tupniehtsini_latx.ecafretnirotallicsolatsyrc .tuptuoehtsituo_latx 4e ot upn ip ullup ,wolnehw.delbanesituptuoq,hgihnehw.nipelbanetuptuo .slevelecafretnilttvl/somcvl.etatszihottuptuoqsecrof 5d n gr ewo p. dnuorgylppusrewop 6v odd rewo p. nipylppustuptuo 7q t uptuo .slevelecafretnilttvl/somcvl.tuptuokcolcdedne-elgnis 51 .ecnadepmituptuo 8c nd esun ut cennocon :eton pullup .seulavlacipytrof,scitsiretcarahcnip,2elbatees.srotsisertupnilanretniotsrefer
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 3 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement t able 5. c rystal c haracteristics a bsolute m aximum r atings supply voltage, v dd 4.6v inputs, v i -0.5v to v dd + 0.5 v outputs, v o -0.5v to v ddo + 0.5v package thermal impedance, ja 8 lead tssop 101.7c/w (0 mps) 8 lead soic 112.7c/w (0 lfpm) storage temperature, t stg -65c to 150c note: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these ratings are stress specifications only. func- tional operation of product at these conditions or any condi- tions beyond those listed in the dc characteristics or ac characteristics is not implied. exposure to absolute maxi- mum rating conditions for extended periods may affect prod- uct reliability. t able 4a. p ower s upply dc c haracteristics , v dd = v ddo = 3.3v0.3v, t a = 0c to 70c t able 4b. lvcmos/lvttl dc c haracteristics , v dd = v ddo = 3.3v0.3v, t a = 0c to 70c lobmy sr etemara ps noitidnoctse tm umini ml acipy tm umixa ms tinu v hi egatlovhgihtupni 2v dd 3.0 +v v li egatlovwoltupni 3.0 -8 . 0v i hi tnerruchgihtupn iv dd v= ni v6.3 =5 a i li tnerrucwoltupn iv dd v,v6.3= ni v0 =0 51 -a v ho 1eton;egatlovhgihtuptuo 6. 2v v lo 1eton;egatlovwoltuptuo 5. 0v 05htiwdetanimretstuptuo:1eton vot odd ,noitcesnoitamrofnitnemerusaemretemarapees.2/ ."tiucrictsetdaoltuptuov3.3" retemara ps noitidnoctse tm umini ml acipy tm umixa ms tinu noitallicsofoedom latnemadnuf ycneuqerf 5 2z hm ecnaticapactnuhs 7f p levelevird 1w m lobmy sr etemara ps noitidnoctse tm umini ml acipy tm umixa ms tinu v dd egatlovylppusrewop 0. 33 . 36 . 3v v odd egatlovylppustuptuo 0. 33 . 36 . 3v i dd tnerrucylppusrewo pv =eo dd )delbanetuptuo (6 9a m i odd tnerrucylppustuptuo 4 2a m
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 4 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement t able 6. ac c haracteristics , v dd = v ddo = 3.3v0.3v, t a = 0c to 70c lobmy sr etemara ps noitidnoctse tm umini ml acipy tm umixa ms tinu f tuo ycneuqerftuptuo 52 1z hm t jd 1eton;rettijcitsinimreted 1. 0s p t jr 1eton;rettijmodnar 7. 3s p t smr (noitubirtsidlatotfosmr ;) 1eton 7. 3s p t p-p 1eton;rettijkaep-ot-kaep 0 3s p t cso emitputratsnoitallicso egatlovgnitarepomuminimtaemit s0ebot 0 1s m t r t/ f emitllaf/esirtuptu o% 08ot%0 20 5 20 0 9s p cd oe lcycytudtuptuo 8 42 5% 05htiwdetanimretstuptuo vot odd ,noitcesnoitamrofnitnemerusaemretemarapees.2/ ."tiucrictsetdaoltuptuov3.3" .0003-aistsercevawgnisuderusaem:1eton
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 5 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement p arameter m easurement i nformation o utput r ise /f all t ime 3.3v o utput l oad ac t est c ircuit scope qx lvcmos 1.65v 0.15v -1.65v 0.15v clock outputs 20% 80% 80% 20% t r t f t period t pw t period odc = v ddo 2 x 100% t pw q gnd v dd, v ddo o utput d uty c ycle /p ulse w idth /p eriod
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 6 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement a pplication i nformation figure 1. c rystal i npu t i nterface c rystal i nput i nterface the ics840-125 has been characterized with 18pf parallel resonant crystals. the capacitor values, c1 and c2, shown in figure 1 below were determined using a 25mhz, 18pf paral- lel resonant crystal and were chosen to minimize the ppm error. the optimum c1 and c2 values can be slightly adjusted for different board layouts. x1 18pf parallel cry stal c1 12p xtal _ou t xtal _i n c2 12p
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 7 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement r eliability i nformation t ransistor c ount the transistor count for ics840-125 is: 2423 t able 7a. ja vs . a ir f low t able for 8 l ead tssop ? ? ja by velocity (meters per second) 0 1 2.5 multi-layer pcb, jedec standard test boards 101.7c/w 90.5c/w 89.8c/w t able 7b. ja vs . a ir f low t able 8 l ead soic ? ? ja by velocity (linear feet per minute) 0 200 500 single-layer pcb, jedec standard t est boards 153.3c/w 128.5c/w 115.5c/w multi-layer pcb, jedec standard t est boards 112.7c/w 103.3c/w 97.1c/w note: most modern pcb designs use multi-layered boards. the data in the second row pertains to most designs.
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 8 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement p ackage o utline - g s uffix for 8 l ead tssop t able 8a. p ackage d imensions lobmys sretemillim mumini mm umixam n8 a- -0 2.1 1 a5 0. 05 1.0 2 a0 8. 05 0.1 b9 1. 00 3.0 c9 0. 00 2.0 d0 9. 20 1.3 ec isab04.6 1 e0 3. 40 5.4 ec isab56.0 l5 4 . 05 7.0 0 8 aa a- -0 1.0 p ackage o utline - m s uffix for 8 l ead soic t able 8b. p ackage d imensions reference document: jedec publication 95, ms-012 lobmys sretemillim mumini mm umixam n8 a5 3. 15 7.1 1 a0 1. 05 2.0 b3 3. 01 5.0 c9 1. 05 2.0 d0 8. 40 0.5 e0 8. 30 0.4 ec isab72.1 h0 8. 50 2.6 h5 2. 00 5.0 l0 4. 07 2.1 0 8
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 9 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement t able 9. o rdering i nformation while the information presented herein has been checked for both accuracy and reliability, integrated circuit systems, incorpor ated (ics) assumes no responsibility for either its use or for infringement of any patents or other rights of third parties, which would result from its use. no other circuits, patents, or licenses are implied. this product is intended for use in normal commercial applications. any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ics. ics reserves the right to change any circuitry or specifications without notice. ics does not authorize or warrant any ics product for use in life support devices or critical medical instruments. the aforementioned trademark, hiperclocks is a trademark of integrated circuit systems, inc. or its subsidiaries in the united states and/or other countries. rebmunredro/tra pg nikra me gakca pg nigakcapgnippih se rutarepmet 521-ga048sc i5 21g ap osstdael 8e bu tc 07otc0 t521-ga048sc i5 21g ap osstdael 8l eer&epat005 2c 07otc0 fl521-ga048sc id b tp osst"eerf-dael"dael 8e bu tc 07otc0 tfl521-ga048sc id b tp osst"eerf-dael"dael 8l eer&epat005 2c 07otc0 521-ma048sc i5 21ma04 8c iosdael 8e bu tc 07otc0 t521-ma048sc i5 21ma04 8c iosdael 8l eer&epat005 2c 07otc0 fl521-ma048sc il 521a04 8c ios"eerf-dael"dael 8e bu tc 07otc0 tfl521-ma048sc il 521a04 8c ios"eerf-dael"dael 8l eer&epat005 2c 07otc0 .tnailpmocshoreradnanoitarugifnoceerf-bpehterarebmuntrapehtotxiffus"fl"nahtiwderedroeratahtstrap:eton
840ag-125 www.icst.com/products/hiperclocks.html rev. a july 30, 2007 10 ics840-125 125mh z , lvcmos/lvttl o scillator r eplacement teehsyrotsihnoisiver ve re lba te ga pe gnahcfonoitpircse de tad a9 t9 strapmaehtrofgnikrameerfdaeldedda-elbatnoitamrof nigniredro 70-03-7
|
