the smart timing choice ? the smart timing choice ? sitime corporation 990 almanor avenue, sunnyvale, ca 94085 (408) 328-4400 www.sitime.com rev. 1.7 revised november 18, 2013 SIT9003 low power spread spectrum oscillator features applications ? frequency range from 1 mhz to 110 mhz ? printers ? lvcmos/lvttl compatible output ? flat panel drivers ? standby current as low as 0.4 a ? pci ? fast resume time of 3 ms (typ) ? microprocessors ? <30 ps cycle-to-cycle jitter ? spread options (contact sitime for other spread options) ? center spread: 0.50%, 0.25% ? down spread: -1%, -0.5% ? standby, output enable, or spread disable mode ? industry-standard packages: 2.5 x 2.0, 3.2 x 2.5, 5.0 x 3.2, 7.0 x 5.0 mm x mm ? outstanding mechanical robust ness for portable applications ? all-silicon device wi th outstanding reliability of 2 fit (10x improvement over quartz-b ased devices), enhancing system mean-time-to-failure (mtbf) ? pb-free, rohs and reach compliant dc electrical characteristics parameters symbol min. typ. max. unit condition output frequency range f1?110mhz frequency tolerance f_tol -50 ? +50 ppm inclusive of: initial stability, operating temperature, rated power, supply voltage change, load change, shock and vibration spread off -100 ? +100 ppm aging ag -1 ? 1 ppm 1st year at 25c operating temperature range t_use -20 ? +70 c extended commercial -40 ? +85 c industrial supply voltage vdd 1.71 1.8 1.89 v 2.25 2.5 2.75 v 2.52 2.8 3.08 v 2.97 3.3 3.63 v current consumption idd ? 3.7 4.1 ma no load condition, f = 20 mhz, vdd = 2.5 v, 2.8 v or 3.3 v ? 3.2 3.5 ma no load condition, f = 20 mhz, vdd = 1.8 v standby current i_std ? 2.4 4.3 ast = gnd, vdd = 3.3 v, output is weakly pulled down ?1.22.2 ast = gnd, vdd = 2.5 or 2.8 v, output is weakly pulled down ?0.40.8 ast = gnd, vdd = 1.8 v, output is weakly pulled down duty cycle dc 45 ? 55 % all vdds. f <= 70 mhz 40 ? 60 % all vdds. f >70 mhz rise/fall time tr, tf ? 1 2 ns 20% - 80% vdd=2.5 v, 2.8 v or 3.3 v, 15 pf load - 1.3 2.5 ns 20% - 80% vdd=1.8 v, 15 pf load output voltage high voh 90% ? ? vdd ioh = -4 ma (vdd = 3.3 v) ioh = -3 ma (vdd = 2.8 v and 2.5 v) ioh = -2 ma (vdd = 1.8 v) output voltage low vol ? ? 10 %vdd iol = -4 ma (vdd = 3.3 v) iol = -3 ma (vdd = 2.8 v and 2.5 v) iol = -2 ma (vdd = 1.8 v) output load ld ? ? 15 pf at maximum frequency and supply voltage. contact sitime for higher output load option input voltage high vih 70% ? ? vdd pin 1, oe or st or sd input voltage low vil ? ? 30% vdd pin 1, oe or st or sd startup time t_start ? ? 10 ms measured from the time vdd reaches its rated minimum value resume time t_resume ? 3.0 3.8 ms measured from the time st pin crosses 50% threshold cycle-to-cycle jitter t_cyc ? ? 26 ps f = 50 mhz, spread = on ? ? 26 ps f = 50 mhz, spread = off
rev. 1.7 page 2 of 9 www.sitime.com the smart timing choice ? the smart timing choice ? 1. in both center spread and down spread modes, triangle modulation is employed with a frequency of ~32 khz. 2. 0.5% and -1.0% are available only for <75 mhz in extended commercial temperature range. note: 3. in 1.8 v mode, a resistor of <10 k ? between oe pin and vdd is recommended. notes: 4. test boards compliant with jesd51-3. 5. test boards compliant with jesd51-7. 6. referenced to bottom of case. spread spectrum modes [1] center spread down spread code bdoq percentage 0.25% 0.50% [2] -0.5% -1.0% [2] pin configuration pin symbol functionality 1st /oe/sd standby (st) h or open [3] : specified frequency output l: output is low (weak pull down). oscillator stops output enable (oe) h or open [3] : specified frequency output l: output is high impedance. spread disable (sd) h or open: spread = on l: spread =off 2 gnd ground connect to ground 3 clk output clock output 4 vdd power supply absolute maximum attempted operation outside the absolute maximum ratings of the part may cause permanent damage to the part. actual perfor- mance of the ic is only guaranteed within the operational s pecifications, not at absolute maximum ratings. parameters min. max. unit storage temperature -65 150 c vdd -0.5 4 v electrostatic discharge ? 2000 v soldering temperature (follow sta ndard pb free soldering guidelines) ? 260 c number of program writes ?1na program retention over -40 to 125c, process, vdd (0 to 3.65v) ? 1,000+ years thermal considerations package lead count center pad junction-to-ambient thermal resistance (c/w) junction-to-case [6] (bottom) thermal resistance (c/w) 4 layer board [5] 2 layer board [4] 7050 4 soldered down 43.6 229 2.6 7050 4 not soldered down 191 263 2.6 7050 4 no center pad 142 273 29.8 5032 4 no center pad 96.8 199 24 3225 4 no center pad 109 212 27 2520 4 no center pad 117 222 26 top view 1 4 3 2 st/oe/sd vdd clk gnd
rev. 1.7 page 3 of 9 www.sitime.com the smart timing choice ? the smart timing choice ? environmental compliance parameter condition/test method mechanical shock mil-std-883f, method 2002 mechanical vibration mil-std-883f, method 2007 temperature cycle jesd22, method a104 solderability mil-std-883f, method 2003 moisture sensibility level msl1 50% vdd vdd st voltage clk output t_resume t_resume: time to resume from st 90% vdd: 2.5/2.8/3.3v parts 95% vdd: 1.8v parts vdd pin 4 voltage clk output t_start t_start: time to start from power-off (st/oe mode) (st mode only)
rev. 1.7 page 4 of 9 www.sitime.com the smart timing choice ? the smart timing choice ? the SIT9003 includes a progra mmable drive strength feature to provide a simple, flexible tool to optimize the clock rise/fall time for specific applications. benefits from the programmable drive strength feature are: ? improves system radiated electromagnetic interference (emi) by slowing down the clock rise/fall time ? improves the downstream clock receiver?s (rx) jitter by de- creasing (speeding up) the clock rise/fall time. ? ability to drive large capacitive loads while maintaining full swing with sharp edge rates. for more detailed information about rise/fall time control and drive strength selection, see the sitime applications note section; http://www.sitime.com/s upport/application-notes. emi reduction by slowing rise/fall time figure 1 shows the harmonic power reduction as the rise/fall times are increased (slowed down). the rise/fall times are expressed as a ratio of the clock period. for the ratio of 0.05, the signal is very close to a square wave. for the ratio of 0.45, the rise/fall times are very close to near-triangular waveform. these results, for example, show that the 11th clock harmonic can be reduced by 35 db if the rise/fall edge is increased from 5% of the period to 45% of the period. figure 1. harmonic emi reduction as a function of slower rise/fall time jitter reduction with faster rise/fall time power supply noise can be a source of jitter for the downstream chipset. one way to reduce this jitter is to increase rise/fall time (edge rate) of the input clock. some chipsets would require faster rise/fall time in order to reduce their sensitivity to this type of jitter. the SIT9003 provides up to 3 additional high drive strength settings for very fast rise/fall time. refer to the rise/fall time tables to determine the proper drive strength. high output load capability the rise/fall time of the input cl ock varies as a function of the actual capacitive load the clock drives. at any given drive strength, the rise/fall time becomes slower as the output load increases. as an example, fo r a 3.3v SIT9003 device with default drive strength setting, th e typical rise/fall time is 1.1ns for 15 pf output load. the typical rise/fall time slows down to 2.9ns when the output load increases to 45 pf. one can choose to speed up the rise/fall time to 1.9ns by then increasing the drive strength setting on the SIT9003. the SIT9003 can support up to 60 pf or higher in maximum capacitive loads with up to 3 additional drive strength settings. refer to the rise/tall time tables to determine the proper drive strength for the desired combination of output load vs. rise/fall time SIT9003 drive strength selection tables 1 through 4 define the rise/fall time for a given capac- itive load and supply voltage. 1. select the table that matches the SIT9003 nominal supply voltage (1.8v, 2.5v, 2.8v, 3.3v). 2. select the capacitive load column that matches the appli- cation requirement (15 pf to 60 pf) 3. under the capacitive load column, select the desired rise/fall times. 4. the left-most column represents the part number code for the corresponding drive strength. 5. add the drive strength code to the part number for ordering purposes. calculating maximum frequency based on the rise and fall time data given in tables 1 through 4, the maximum frequency the oscillator can operate with guaranteed full swing of the ou tput voltage over temperature as follows: where trf_20/80 is the typical rise/fall time at 20% to 80% vdd example 1 calculate f max for the following condition: ? vdd = 3.3v (table 1) ? capacitive load: 30 pf ? desired tr/f time = 1.6ns (rise /fall time part number code = z) part number for the above example: SIT9003ai z 14-33eb-105.12345 drive strength code is inserted here. default setting is ?-? ? 1357911 -80 -70 -60 -50 -40 -30 -20 -10 0 10 harmonic number harmonic amplitude (db) trise=0.05 trise=0.1 trise=0.15 trise=0.2 trise=0.25 trise=0.3 trise=0.35 trise=0.4 trise=0.45 = 1 5 x trf_20/80 max frequency
rev. 1.7 page 5 of 9 www.sitime.com the smart timing choice ? the smart timing choice ? 10%, t = 40 c to 85 c drive strength unit load (pf) 15 30 45 60 u max. ns 2.4 3.5 5.5 6.4 typ. ns 1.7 2.8 4.3 5.4 x or ???: default max. ns 2.0 2.5 3.9 4.8 typ. ns 1.1 2.0 2.9 3.8 z max. ns 1.2 2.0 3.0 3.7 typ. ns 0.8 1.6 2.2 2.9 h max. ns 0.9 1.7 2.5 3.0 typ. ns 0.6 1.3 1.9 2.3 table 2. rise/fall times, vdd = 2.8v 10%, t = 40 c to 85 c drive strength unit load (pf) 15 30 45 60 u max. ns 2.5 4.1 6.0 7.3 typ. ns 2.0 3.2 4.8 5.9 x max. ns 2.2 3.0 4.5 5.4 typ. ns 1.3 2.2 3.3 4.3 x or ???: default max. ns 2.0 2.4 3.5 4.3 typ. ns 1.0 1.7 2.5 3.2 h max. ns 1.2 1.9 2.9 3.6 typ. ns 0.7 1.5 2.0 2.6 table 3. rise/fall times, vdd = 2.5v 10%, t = 40 c to 85 c drive strength unit load (pf) 15 30 45 60 u max. ns 2.8 4.6 6.8 8.3 typ. ns 2.1 3.6 5.2 6.4 x max. ns 2.3 3.3 5.0 5.9 typ. ns 1.4 2.5 3.7 4.7 x or ???: default max. ns 2.0 2.6 3.4 4.8 typ. ns 1.1 1.9 2.8 3.6 h max. ns 1.3 2.2 3.3 4.0 typ. ns 0.9 1.6 2.3 2.9 table 4. rise/fall times, vdd = 1.8v 5%, t = 40 c to 85 c drive strength unit load (pf) 15 30 45 60 u max. ns 4.2 6.8 9.4 12.1 typ. ns 3.1 5.1 7.3 9.2 x max. ns 3.2 4.9 6.9 8.7 typ. ns 2.3 3.7 5.3 6.5 z max. ns 2.7 3.9 5.5 6.7 typ. ns 1.7 2.9 4.2 5.2 x or ???: default max. ns 2.5 3.3 4.6 5.7 typ. ns 1.4 2.4 3.4 4.3 note: 7. all rise/fall times are measured for the thresholds of 20% to 80% of vdd.
rev. 1.7 page 6 of 9 www.sitime.com the smart timing choice ? the smart timing choice ? [8] recommended land pattern (unit: mm) [9] 2.5 x 2.0 x 0.75 mm 3.2 x 2.5 x 0.75 mm 5.0 x 3.2 x 0.75 mm 7.0 x 5.0 x 0.90 mm 2.5 0.05 2.0 0.05 1.1 1.00 0.75 0.5 0.75 0.05 yxxxx #1 #2 #4 #3 #2 #1 #3 #4 1.9 1.1 1.0 1.5 3.2 0.05 2.5 0.05 2.1 0.9 0.7 0.9 0.75 0.05 #1 #2 #4 #3 #2 #1 #3 #4 yxxxx 2.2 1.9 1.4 1.2 5.0 0.05 3.2 0.05 2.39 0.8 1.15 1.1 0.75 0.05 #1 #2 #4 #3 #2 #1 #3 #4 yxxxx 2.54 1.5 1.6 2.2 5.0 0.05 1.4 1.1 5.08 7.0 0.05 2.6 0.90 0.10 yxxxx 5.08 3.81 2.2 2.0
rev. 1.7 page 7 of 9 www.sitime.com the smart timing choice ? the smart timing choice ? 8. top marking: y denotes manufacturing origin and xxxx denotes manufacturing lot number. the value of ?y? will depend on the as sembly location of the device. 9. a capacitor of value 0.1 f between vdd and gnd is required. dimensions and patterns package size ? dimensions (unit: mm) [8] recommended land pattern (unit: mm) [9] 7.0 x 5.0 x 0.90 mm (with center-pad) 0.900.10 do not connect the center pad or connect it to device?s gnd yxxxx 5.08 3.81 2.2 2.0
rev. 1.7 page 8 of 9 www.sitime.com the smart timing choice ? the smart timing choice ? b = 0.25% 1-110 mhz d = 0.50% 1-75 mhz ? o = -0.50% 1-110 mhz q = -1.0% 1-75 mhz ? ordering codes for su pported tape & reel packing method device size 12 mm t&r (3ku) 12 mm t&r (1ku) 16 mm t&r (3ku) 16 mm t&r (1ku) 2.5 x 2.0 mm t y ? ? 3.2 x 2.5 mm t y ? ? 5.0 x 3.2 mm t y ? ? 7.0 x 5.0 mm ? ? t y frequency 1.00000 to 110.00000 mhz part family ?SIT9003? revision letter ?a? is the revision temperature range ?i? industrial, -40 to 85oc supply voltage packaging leave blank for bulk feature pin ?e? for output enable ?s? for standby ?c? commercial, -20 to 70oc package size ?1? 2.5 x 2.0 mm ?2? 3.2 x 2.5 mm ?3? 5.0 x 3.2 mm ?t? and ?y? ordering codes for appropriate t&r. please refer to the table below. ?4? 7.0 x 5.0 mm (with center pad) SIT9003ac -14-18eb-66.6 6 6 0 0 t output drive strength ??? default (datasheet limits) see ?drive strength settings? ?u? ?x? ?z? ?h? spread spectrum percentage ?b? for 0.25% frequency stability ?3? for 50 ppm ?4? for 100 ppm ?d? for spread disable ?d? for 0.50% ?o? for -0.50% ?q? for -1.0% ?8? 7.0 x 5.0 mm (without center pad) ?18? for 1.8v ?25? for 2.5v ?28? for 2.8v ?33? for 3.3v
rev. 1.7 page 9 of 9 www.sitime.com ? sitime corporation 2013. the information contained herein is subject to change at any time without notice. sitime assumes no responsibility or liability for any loss, damage or defect of a product which is caused in whole or in part by (i) use of any circuitry other than circuitry embodied in a sitime product, (ii) misuse or abuse including static discharge, neglect or accident, (iii) unauthorized modification or repairs which have been soldered or altered during assembly and are not capable of being tested by sitime under its normal test conditions, or (iv) improper installation, storage, handling, warehousing or transportation, or (v) being subjected to unusual physical, thermal, or electri cal stress. disclaimer: sitime makes no warranty of any kind, express or implied, with regard to this material, and specifically disclaims any and al l express or implied warranties, either in fact or by operation of law, statutory or otherwise, including the implied warranties of merchantability and fitness for use or a particul ar purpose, and any implied warranty arising from course of dealing or usage of trade, as well as any common-law duties relating to accuracy or lack of negligence, with respect to this material, any sitime product and any product documentation. products sold by sitime are not suitable or intended to be used in a life support application or co mponent, to operate nuclear facilities, or in other mission critical applications where human life may be involved or at stake. all sales are made conditioned upon compliance with the critical uses policy set forth below. critical use exclusion policy buyer agrees not to use sitime's products for any application or in any components used in life support devices or to operate n uclear facilities or for use in other mission-critical applications or comp onents where human life or property may be at stake. sitime owns all rights, title and interest to the intellectual property related to sitime's products, including any software, f irmware, copyright, patent, or trademark. the sale of sitime products does not convey or imply any license under patent or other rights. sitime retains the copyright and trademark rights in all doc uments, catalogs and plans supplied pursuant to or ancillary to the sale of products or services by sitime. unless otherwise agreed to in writing by sitime, any reproduction, modification, transl ation, compilation, or representation of this material shall be strictly prohibited. the smart timing choice ? the smart timing choice ? low power spread spectrum oscillator SIT9003 revision history version release date change summary 1.62 8/20/13 added drive strength settings 1.7 11/18/13 revised rise and fall time tables, added 7050 pa ckage diagram with center pad, add thermal considerations.
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