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the smart timing choice ? the smart timing choice ? sitime corporation 990 almanor avenue, sunnyvale, ca 94085 (408) 328-4400 www.sitime.com rev. 1.01 revised june 18, 2015 SIT8920B -55 c to +125 c oscillator features applications ? frequencies between 1 mhz and 110 mhz accurate to 6 decimal places ? ruggedized equipment in harsh operating environment ? operating temperature from -55c to 125c ? supply voltage of 1.8v or 2.5v to 3.3v ? excellent total frequency stability as low as 20 ppm ? low power consumption of 3.5 ma typical at 1.8v ? lvcmos/lvttl compatible output ? industry-standard packages: 2.0 x 1.6, 2.5 x 2.0, 3.2 x 2.5, 5. 0 x 3.2, 7.0 x 5.0 mm x mm ? instant samples with time machine ii and field programmable oscillators ? rohs and reach compliant, pb-free, halogen-free and antimony-free electrical specifications table 1. electrical characteristics all min and max limits are specified over temperature and rated operating voltage with 15 pf output load unless otherwise stat ed. typical values are at 25c and nominal supply voltage. parameters symbol min. typ. max. unit condition frequency range output frequency range f 1 C 110 mhz refer to table 13 for the exact list of supported frequencies list of supported frequencies frequency stability and aging frequency stability f_stab -20 C +20 ppm inclusive of initial tolerance at 25c, 1st yea r aging at 25c, and variations over operating temperature, rated power supply voltage and load (15 pf 10%). -25 C +25 ppm -30 C +30 ppm -50 C +50 ppm operating temperature range operating temperature range t_use -55 C +125 c supply voltage and current consumption supply voltage vdd 1.62 1.8 1.98 v 2.25 2.5 2.75 v 2.52 2.8 3.08 v 2.7 3.0 3.3 v 2.97 3.3 3.63 v 2.25 C 3.63 v current consumption idd C 3.8 4.7 ma no load condition, f = 20 mhz, vdd = 2.8v, 3.0v or 3.3v C 3.6 4.5 ma no load condition, f = 20 mhz, vdd = 2.5v C 3.5 4.5 ma no load condition, f = 20 mhz, vdd = 1.8v oe disable current i_od C C 4.5 ma vdd = 2.5v to 3.3v, oe = low, output in high z state . C C 4.3 ma vdd = 1.8v, oe = low, output in high z state. standby current i_std C 2.6 8.5 ? a vdd = 2.8v to 3.3v, st = low, output is weakly pulled down C1.45.5 ? a vdd = 2.5v, st = low, output is weakly pulled down C0.64.0 ? a vdd = 1.8v, st = low, output is weakly pulled down lvcmos output characteristics duty cycle dc 45 C 55 % all vdds rise/fall time tr, tf C 1.0 2.0 ns vdd = 2.5v, 2.8v, 3.0v or 3.3v, 20% - 80% C 1.3 2.5 ns vdd =1.8v, 20% - 80% C 1.0 3 ns vdd = 2.25v - 3.63v, 20% - 80% output high voltage voh 90% C C vdd ioh = -4 ma (vdd = 3.0v or 3.3v) ioh = -3 ma (vdd = 2.8v or 2.5v) ioh = -2 ma (vdd = 1.8v) output low voltage vol C C 10% vdd iol = 4 ma (vdd = 3.0v or 3.3v) iol = 3 ma (vdd = 2.8v or 2.5v) iol = 2 ma (vdd = 1.8v)
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 2 of 13 www.sitime.com notes: 1. in oe or st mode, a pull-up resistor of 10kohm or less is recommended if p in 1 is not externally driven. if pin 1 needs to be left floating, use the nc option. 2. a capacitor of value 0.1 f or higher between vdd and gnd is required. table 1. electrical characteristics (continued) parameters symbol min. typ. max. unit condition input characteristics input high voltage vih 70% C C vdd pin 1, oe or st input low voltage vil C C 30% vdd pin 1, oe or st input pull-up impedence z_in 50 87 150 k ? pin 1, oe logic high or logic low, or st logic high 2CCm ? pin 1, st logic low startup and resume timing startup time t_start C C 5 ms measured from the time vdd reaches its rated minimu m value enable/disable time t_oe C C 130 ns f = 110 mhz. for other frequencies, t_oe = 100 ns + 3 * clock periods resume time t_resume C C 5 ms measured from the time st pin crosses 50% threshol d jitter rms period jitter t_jitt C 1.6 2.5 ps f = 75mhz, vdd = 2.5v, 2.8v, 3.0v or 3.3v C 1.9 3 ps f = 75mhz, vdd = 1.8v peak-to-peak period jitter t_pk C 12 20 ps f = 75mhz, vdd = 2.5v, 2.8v, 3.0v or 3.3v C 14 25 ps f = 75mhz,vdd = 1.8v rms phase jitter (random) t_phj C 0.5 0.8 ps f = 75mhz, integration bandwidth = 900 khz to 7.5 mhz C 1.3 2 ps f = 75mhz, integration bandwidth = 12 khz to 20 mhz table 2. pin description pin symbol functionality 1oe/ st/ nc output enable h [1] : specified frequency output l: output is high impedance. only output driver is disabled. standby h [1] : specified frequency output l: output is low (weak pull down). device goes to sleep mode. s upply current reduces to i_std. no connect any voltage between 0 and vdd or open [1] : specified frequency output. pin 1 has no function. 2 gnd power electrical ground 3 out output oscillator output 4 vdd power power supply voltage [2] 1 4 oe/st/nc vdd 3 2 gnd out figure 1. pin assignments top view
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 3 of 13 www.sitime.com n note: 4. refer to jesd51-7 for ? ja and ? jc definitions, and reference layout used to determine the ? ja and ? jc values in the above table. note: 5. datasheet specifications are not guaranteed if junction temp erature exceeds the maximum operating junction temperature. table 3. absolut e maximum limits attempted operation outside the absolute maximum ratings of the part may cause permanent damag e to the part. actual perfor- mance of the ic is only guarante ed within the o perational speci fications, not at absolute maximum ratings. parameter min. max. unit storage temperature -65 150 c vdd -0.5 4 v electrostatic discharge C2000v soldering temperature (follow sta ndard pb free soldering guidel ines) C 260 c junction temperature [3] C 150 c note: 3. exceeding this temperature for extended period of time may d amage the device. table 4. thermal consideration [4] package ? ja, 4 layer board (c/w) ? ja, 2 layer board (c/w) ? jc, bottom (c/w) 7050 142 273 30 5032 97 199 24 3225 109 212 27 2520 117 222 26 2016 152 252 36 table 5. maximum operati ng junction temperature [5] max operating temperature (ambient) maximum operating junction temperature 125c 135c table 6. 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 sensitivity level msl1 @ 260c
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 4 of 13 www.sitime.com note: 7. sit8920 has no runt pulses and no glitch output during s tartup or resume. test circuit and waveform [6] figure 2. test circuit note: 6. duty cycle is computed as duty cycle = th/period. figure 3. waveform timing diagrams figure 4. startup timing (oe/st mode) figure 5. standby resume timing (st mode only) u figure 6. oe enable timing (oe mode only) figure 7. oe disable t iming (oe mode only) 4 1 3 2 0.1f power supply oe/st function test point 15pf (including probe and fixture capacitance) vdd vout vdd 1k ? 80% vdd high pulse (th) 50% 20% vdd period tf tr low pulse (tl) 90% vdd vdd pin 4 voltage clk output t_start t_start: time to start from power-off no glitch during start up [7] hz 50% vdd vdd st voltage clk output t_resume t_resume: time to resume from st hz 50% vdd vdd oe voltage clk output t_oe t_oe: time to re-enable the clock output hz 50% vdd vdd oe voltage clk output t_oe: time to put the output in high z mode hz t_oe
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 5 of 13 www.sitime.com performance plots [8] figure 8. idd vs frequency figure 9. frequency vs temperature figure 10. rms period jitter vs frequency f igure 11. duty cycle vs frequency figure 12. 20%-80% rise time vs temperature figure 13. 20%-80% f all time vs temperature 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0 20406080100 1.8 v 2.5 v 2.8 v 3 v 3.3 v idd (ma) frequency (mhz) -25 -20 -15 -10 -5 0 5 10 15 20 25 \ 55 \ 35 \ 155 25456585105125 dut1 dut2 dut3 dut4 dut5 dut6 dut7 dut8 dut9 dut10 dut11 dut12 dut13 dut14 dut15 dut16 dut17 dut18 dut19 dut20 frequency (ppm) temperature (c) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 20406080100 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v rms period jitter (ps) frequency (mhz) 45 46 47 48 49 50 51 52 53 54 55 0 20406080100 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v duty cycle (%) frequency (mhz) 0.0 0.5 1.0 1.5 2.0 2.5 -40 -20 0 20 40 60 80 100 120 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v rise time (ns) temperature (c) 0.0 0.5 1.0 1.5 2.0 2.5 -40-20 0 20406080100120 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v fall time (ns) temperature (c)
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 6 of 13 www.sitime.com performance plots [8] figure 14. rms integrated phase jitter random (12k to 20 mhz) vs frequency [9] figure 15. rms integrat ed phase jitter random (900 khz to 20 mhz) vs frequency [9] notes: 8. all plots are measured with 15 pf load at room temperature, unless otherwise stated. 9. phase noise plots are measur ed with agilent e5052b signal so urce analyzer. integration range is 12 khz to 5 mhz for carrier frequencies up to 40 mhz. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 10 20 30 40 50 60 70 80 90 100 110 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v ipj (ps) frequency (mhz) 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 10 20 30 40 50 60 70 80 90 100 110 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v ipj (ps) frequency (mhz)
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 7 of 13 www.sitime.com programmable drive strength the sit8920 includes a programmable drive strength feature to provide a simple, flexible tool to optimize the clock rise/f all 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 receivers (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 slow ing rise/fall time figure 16 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 clo ck period. for the ratio of 0.05 , the signal is very close to a square wave. for the ratio of 0.4 5, 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 16. harmonic emi re duction 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 speed up the rise/fall time of the input clock. some chipsets may als o require faster rise/fall time in order to reduce their sensitiv ity to this type of jitter. refer to the rise/fall time tables (table 7 to table 11) to determine the proper drive strength. high output load capability the rise/fall time of the input clock varies as a function of t he actual capacitive load the clo ck drives. at any given drive strength, the rise/fall time becomes slower as the output load increases. as an example, for a 3.3v sit8920 device with default drive strength setting, the typical rise/fall time is 1 ns for 15 pf output load. the typical rise/fall time slows down to 2.6ns when the output load increases to 45 pf. one can choose to speed up the rise/fall time to 1.83ns by then increasing the drive strengt h setting on the sit8920. the sit8920 can support up to 60 pf or higher in maximum capacitive loads with drive st rength settings. refer to the rise/tall time tables (table 7 to 11) to determine the proper drive strength for the desired combination of output load vs. rise/fall time sit8920 drive strength selection tables 7 through 11 define the rise/fall time for a given capac - itive load and supply voltage. 1. select the table that matches the sit8920 nominal supply voltage (1.8v, 2.5v, 2.8v, 3.0v, 3.3v). 2. select the capacitive load co lumn that matches the appli- cation requirement (5 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 7 through 11, the maximum frequency the oscillator can operate with guaranteed full swing of the output voltage over temperature as follows: where trf_20/80 is the typical value for 20%-80% rise/fall time. example 1 calculate f max for the following condition: ? vdd = 1.8v (table 7) ? capacitive load: 30 pf ? desired tr/f time = 3 ns (rise/fall time part number code = e) part number for the above example: SIT8920Bm e 12-18e-66.666660 drive strength code i s inserted here. def ault 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
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 8 of 13 www.sitime.com rise/fall time (20% to 80%) vs c load tables table 7. vdd = 1.8v rise/fall times for specific c load table 8. vdd = 2.5v rise/f all times for specific c load table 9. vdd = 2.8v rise/fall times for specific c load table 10. vdd = 3.0v rise/ fall times for specific c load table 11. vdd = 3.3v rise/fall times for specific c load drive ? strength ? \ ? c load 5 ? pf 15 ? pf 30 ? pf 45 ? pf 60 ? pf l 6.16 11.61 22.00 31.27 39.91 a 3.19 6.35 11.00 16.01 21.52 r ? 2.11 4.31 7.65 10.77 14.47 b 1.65 3.23 5.79 8.18 11.08 t 0.93 1.91 3.32 4.66 6.48 e 0.78 1.66 2.94 4.09 5.74 u 0.70 1.48 2.64 3.68 5.09 f ? or ? " \ ": ? default 0.65 1.30 2.40 3.35 4.56 rise/fall ? time ? typ ? (ns) drive ? strength ? \ ? c load 5 ? pf 15 ? pf 30 ? pf 45 ? pf 60 ? pf l 4.13 8.25 12.82 21.45 27.79 a 2.11 4.27 7.64 11.20 14.49 r ? 1.45 2.81 5.16 7.65 9.88 b 1.09 2.20 3.88 5.86 7.57 t 0.62 1.28 2.27 3.51 4.45 e ? or ? " \ ": ? default 0.54 1.00 2.01 3.10 4.01 u 0.43 0.96 1.81 2.79 3.65 f ? 0.34 0.88 1.64 2.54 3.32 rise/fall ? time ? typ ? (ns) drive ? strength ? \ ? c load 5 ? pf 15 ? pf 30 ? pf 45 ? pf 60 ? pf l 3.77 7.54 12.28 19.57 25.27 a 1.94 3.90 7.03 10.24 13.34 r ? 1.29 2.57 4.72 7.01 9.06 b 0.97 2.00 3.54 5.43 6.93 t 0.55 1.12 2.08 3.22 4.08 e ? or ? " \ ": ? default 0.44 1.00 1.83 2.82 3.67 u 0.34 0.88 1.64 2.52 3.30 f 0.29 0.81 1.48 2.29 2.99 rise/fall ? time ? typ ? (ns) drive ? strength ? \ ? c load 5 ? pf 15 ? pf 30 ? pf 45 ? pf 60 ? pf l 3.60 7.21 11.97 18.74 24.30 a 1.84 3.71 6.72 9.86 12.68 r ? 1.22 2.46 4.54 6.76 8.62 b 0.89 1.92 3.39 5.20 6.64 t ? or ? " \ ": ? default 0.51 1.00 1.97 3.07 3.90 e 0.38 0.92 1.72 2.71 3.51 u 0.30 0.83 1.55 2.40 3.13 f 0.27 0.76 1.39 2.16 2.85 rise/fall ? time ? typ ? (ns) drive ? strength ? \ ? c load 5 ? pf 15 ? pf 30 ? pf 45 ? pf 60 ? pf l 3.39 6.88 11.63 17.56 23.59 a 1.74 3.50 6.38 8.98 12.19 r ? 1.16 2.33 4.29 6.04 8.34 b 0.81 1.82 3.22 4.52 6.33 t ? or ? " \ ": ? default 0.46 1.00 1.86 2.60 3.84 e 0.33 0.87 1.64 2.30 3.35 u 0.28 0.79 1.46 2.05 2.93 f 0.25 0.72 1.31 1.83 2.61 rise/fall ? time ? typ ? (ns)
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 9 of 13 www.sitime.com pin 1 configuratio n options (oe, st , or nc) pin 1 of the sit8920 can be factory-programmed to support three modes: output enable (oe), standby (st ) or no connect (nc). these modes can also be programmed with the time machine using field programmable devices. output enable (oe) mode in the oe mode, applying logic low to the oe pin only disables the output driver and puts it in hi-z mode. the core of the device continues to operate normally. power consumption is reduced due to the inactivity of the output. when the oe pin is pulled high, the output is ty pically enabled in <1s. standby (st ) mode in the st mode, a device enters into the standby mode when pin 1 pulled low. all internal circuits of the device are turne d off. the current is reduced to a standby current, typically in the range of a few a. when st is pulled high, the device goes through the resume process, which can take up to 5 ms. no connect (nc) mode in the nc mode, the device a lways operates in its normal mode and output the specified frequency regardless of the logic level on pin 1. table 12 below summarizes the key relevant parameters in the operation of the device in oe, st , or nc mode. output on startup and resume the sit8920 comes with gated o utput. its clock output is accurate to the rated frequency stability within the first puls e from initial device startup or resume from the standby mode. in addition, the sit8920 has no runt, no glitch output during startup or resume as shown in the waveform captures in figure 17 and figure 18. figure 17. startup waveform vs. vdd figure 18. startup waveform vs. vdd (zoomed-in view of figure 17) instant samples with t ime machine and field programmable oscillators sitime supports a field programmable version of the sit8920 high temperature oscillator for fast prototyping and real time customization of features. the field programmable devices (fp devices) are available for all five standard sit8920 package sizes and can be configured to ones exact specifi- cation using the time machine ii , an usb powered mems oscillator programmer. customizable features of the sit8920 fp devices include ? frequencies between 1 C 110 mhz ? four frequency stability options, 20 ppm, 25 ppm, 30 ppm, 50 ppm ? six supply voltage options, 1.8v, 2.5v, 2.8v, 3.0v, 3.3v and 2.25 to 3.63v continuous ? output drive strength for more information regarding sitimes field programmable solutions, visit http://www.sitime.com/time-machine and http://www.sitime.com/fp-devices . sit8920 is factory-programmed per customer ordering codes for volume delivery. table 12. oe vs. st vs. nc oe st nc active current 20 mhz (max, 1.8v) 4.5 ma 4.5 ma 4.5 ma oe disable current (max. 1.8v) 4.3 ma n/a n/a standby current (typica l 1.8v) n/a 0.6 ua n/a oe enable time at 110 mhz (max) 130 ns n/a n/a resume time from standby (max, all frequency) n/a 5 ms n/a output driver in oe disable/standby mode high z weak pull-down n/a
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 10 of 13 www.sitime.com dimensions and patterns package size C dimensions (unit: mm) [10] recommended land pattern (unit: mm) [11] 2.0 x 1.6 x 0.75 mm 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 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 2.2 1.9 1.4 1.2 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
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 11 of 13 www.sitime.com 0 notes: 10. top marking: y denotes manufacturing origin and xxxx denote s manufacturing lot number. the value of y will depend on the assembly location of the device. 11. a capacitor of value 0.1 f o r higher between vdd and gnd i s required. dimensions and patterns package size C dimensions (unit: mm) [10] recommended land pattern (unit: mm) [11] 7.0 x 5.0 x 0.90 mm 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
the smart timing choice ? the smart timing choice ? SIT8920B -55 c to +125 c oscillator rev. 1.01 page 12 of 13 www.sitime.com ordering information the part no. guide is for reference only. to customize and buil d an exact part number, use the sitime part number generator. table 13. list of supported frequencies [12, 13] frequency range (-55 to +125 c) min. max. 1.000000 mhz 61.222999 mhz 61.674001 mhz 69.239999 mhz 70.827001 mhz 78.714999 mhz 79.561001 mhz 80.159999 mhz 80.174001 mhz 80.779999 mhz 82.632001 mhz 91.833999 mhz 95.474001 mhz 96.191999 mhz 96.209001 mhz 96.935999 mhz 99.158001 mhz 110.000000 mhz notes: 12. any frequency with in the min and max va lues in the above ta ble are supported with 6 decimal places of accuracy. 13. please contact sitime for frequencies that are not listed in the tables above. table 14. ordering codes for sup ported tape & reel packing meth od device size (mm x mm) 16 mm t&r (3ku) 16 mm t&r (1ku) 12 mm t&r (3ku) 12 mm t&r (1ku) 8 mm t&r (3ku) 8 mm t&r (1ku) 2.0 x 1.6 C C C C d e 2.5 x 2.0 C C C C d e 3.2 x 2.5 C C C C d e 5.0 x 3.2 C C t y C C 7.0 x 5.0 t y C C C C frequency refer to the supported frequency table below part family sit8920 revision letter b is the revision temperature range supply voltage 18 for 1.8v 10% 25 for 2.5v 10% 28 for 2.8v 10% 33 for 3.3v 10% feature pin e for output enable s for standby frequency stability 1 for 20 ppm 2 for 25 ppm package size 1 2.5 x 2.0 mm 2 3.2 x 2.5 mm 3 5.0 x 3.2 mm 8 7.0 x 5.0 mm SIT8920Bm -12-18e - 2 5 .000625d 3 for 50 ppm 7 2.0 x 1.6 mm 30 for 3.0v 10% packing method t: 12 mm tape & reel, 3ku reel y: 12 mm tape & reel, 1ku reel d: 8 mm tape & reel, 3ku reel e: 8 mm tape & reel, 1ku reel blank for bulk m -55oc to 125oc xx for 2.5v -10% to 3.3v +10% output drive strength C default (datasheet limits) see tables 7 to 11 for rise/fall times l a r b t e u f 8 for 30 ppm n for no connect
rev. 1.01 page 13 of 13 www.sitime.com ? sitime corporation 2015. 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 c ircuitry other than circuitry embodied in a sitime product, (ii ) misuse or abuse including static discharge, neglect or accide nt, (iii) unauthorized modification or repairs which have been soldered o r altered during assembly and are not capable of being tested b y sitime under its normal test conditions, or (iv) improper installation, storage, handling, warehousing or transportation, or (v) being subjected to unusu al physical, thermal, or electr ical stress. disclaimer: sitime makes no warranty of any kind, express or implied, wit h regard to this material, and specifically disclaims any and a ll 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 particu lar purpose, and any implied warranty arising from course of de aling or usage of trade, as well as any common-law duties relating to ac curacy or lack of negligence, with respect to this material, an y sitime product and any product documentation. products sold b y sitime are not suitable or inten ded to be used in a life suppor t application or component, to operate nuclear facilities, or i n other mission critical applicat ions where human life may be i nvolved or at stake. all sales are made conditioned upon compliance wit h the critical uses policy set forth below. critical use exclusion policy buyer agrees not to use sitime's products for any application o r in any components used in life support devices or to operate nuclear facilities or for use in other mission-criti cal applications or components 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, firmware, copyright, patent, or trademark. the sale of sitime p roducts does not convey or imply any license under patent or other righ ts. sitime retains the copyright and trademark rights in all do cuments, catalogs and plans supplied pursuant to or ancillary t o the sale of products or services by sitime. unless otherwise agreed to in writing by sitime, any re production, modification, trans lation, compilation, or representation of this material shall b e strictly prohibited. the smart timing choice ? the smart timing choice ? -55 c to +125 c oscillator SIT8920B table 15. additi onal information document description download link time machine ii mems oscillator programmer http://www.sitime.com/support/ti me-machine-oscillator-programme r field programmable oscillators devices that can be programmable in the field by time machine ii http://www.sitime.com/products /field-programmable-oscillators manufacturing notes tape & reel dimension, reflow prof ile and other manufacturing related info http://www.sitime.com/compone nt/docman/doc _download/243-manufac turing-notes-for-sitime-oscillators qualification reports rohs report, reliability reports, composition reports http://www.sitime.com/su pport/quality-and-reliability performance reports additional performance data such as phase noise, current consumption and jitter for selected frequencies http://www.sitime.com/support/ performance-measurement-report termination techniques termination design recommendations http://www.sitime.com/ support/application-notes layout techniques layout recommendations http://www.sitime.com/ support/application-notes revision history table 16. datasheet version and change log version release date change summary 1.0 5/7/15 final production release 1.01 6/18/15 ? added 16 mm t&r information to table 14 ? revised 12 mm t&r information to table 14
the smart timing choice ? the smart timing choice ? sitime corporation 990 almanor avenue, s unnyvale, ca 94085 (408) 328-4400 www.sitime.com supplemental information the supplemental information section is not part of the datasheet and is for informational purposes only.
the smart timing choice ? the smart timing choice ? sitime corporation 990 almanor avenue, sunnyvale, ca 94085 (408) 328-4400 www.sitime.com silicon mems outperforms quartz rev. 1.1 revised october 5, 2013 silicon mems outperforms quartz
the smart timing choice ? the smart timing choice ? silicon mems outperforms quartz silicon mems outperforms quartz rev. 1.1 www.sitime.com best reliability silicon is inherently more reliable than quartz. unlike quartz suppliers, sitime has in-house mems and analog cmos expertise, which allows sitime to develop the most reliable products. figure 1 shows a comparison with quartz technology. why is sitime best in class: ? sitime?s mems resonators are vacuum sealed using an advanced episeal? process, which eliminates foreign par- ticles and improves long term aging and reliability ? world-class mems and cmos design expertise figure 1. reliability comparison [1] best aging unlike quartz, mems oscillators have excellent long term aging performance which is why every new sitime product specifies 10-year aging. a comparison is shown in figure 2. why is sitime best in class: ? sitime?s mems resonators are vacuum sealed using an advanced episeal process, which eliminates foreign parti- cles and improves long term aging and reliability ? inherently better immunity of electrostatically driven mems resonator figure 2. aging comparison [2] best electro magnetic susceptibility (ems) sitime?s oscillators in plastic packages are up to 54 times more immune to external electromagnetic fields than quartz oscillators as shown in figure 3. why is sitime best in class: ? internal differential architecture for best common mode noise rejection ? electrostatically driven mems resonator is more immune to ems figure 3. electro magnetic susceptibility (ems) [3] best power supply noise rejection sitime?s mems oscillators are more resilient against noise on the power supply. a comparison is shown in figure 4. why is sitime best in class: ? on-chip regulators and internal differential architecture for common mode noise rejection ? best analog cmos design expertise figure 4. power supply noise rejection [4] mean time between failure (million hours) 14 16 28 38 500 0 200 400 600 pericom txc epson idt (fox) sitime sitime 20x better 1.5 3.5 3.0 8.0 0 2 4 6 8 10 1-year 10-year sitime mems vs. quartz aging sitime mems oscillator quartz oscillator aging (ppm) sitime 2x better - 39 - 40 - 42 - 43 - 45 - 73 - 90 - 80 - 70 - 60 - 50 - 40 - 30 kyocera epson txc cw silabs sitime sitime vs quartz electro magnetic susceptibility (ems) a v e r a g e s p u r s ( d b ) sitime 54x better 0.0 1.0 2.0 3.0 4.0 5.0 10 100 1,000 10,000 a d d i t i v e i n t e g r a t e d p h a s e j i t t e r p e r m v p - p i n j e c t e d n o i s e ( p s / m v ) power supply noise frequency (khz) power supply noise rejection sitime ndk epson kyocera sitime ? sitime 3x better
the smart timing choice ? the smart timing choice ? silicon mems outperforms quartz silicon mems outperfo rms quartz rev. 1.1 www.sitime.com best vibration robustness high-vibration environments are all around us. all electronics, from handheld devices to enterprise servers and storage systems are subject to vibration. figure 5 shows a comparison of vibration robustness. why is sitime best in class: ? the moving mass of sitime?s mems resonators is up to 3000 times smaller than quartz ? center-anchored mems resonator is the most robust design figure 5. vibration robustness [5] best shock robustness sitime?s oscillators can withstand at least 50,000 g shock. they all maintain their electrical performance in operation during shock events. a comparison with quartz devices is shown in figure 6. why is sitime best in class: ? the moving mass of sitime?s mems resonators is up to 3000 times smaller than quartz ? center-anchored mems resonator is the most robust design figure 6. shock robustness [6] vibration sensitivity (ppb/g) 0.10 1.00 10.00 100.00 10 100 1000 vibration frequency (hz) vibration sensitivity vs. frequency sitime txc epson connor winfield kyocera silabs sitime up to 30x better 14.3 12.6 3.9 2.9 2.5 0.6 0 2 4 6 8 10 12 14 16 k y ocer a e p son txc cw silab s sitime differential xo shock robustness - 500 g sitime up to 25x better peak frequency deviation (ppm) notes: 1. data source: reliability documents of named companies. 2. data source: sitime and quartz oscillator devices datasheets. 3. test conditions for electro magnetic susceptibility (ems): ? according to iec en61000-4.3 (electromagnetic compatibility standard) ? field strength: 3v/m ? radiated signal modulation: am 1 khz at 80% depth ? carrier frequency scan: 80 mhz ? 1 ghz in 1% steps ? antenna polarization: vertical ? dut position: center aligned to antenna devices used in this test: sitime, sit9120ac-1d2-33e156.250000 - mems based - 156.25 mhz epson, eg-2102ca 156.2500m-phpal3 - saw based - 156.25 mhz txc, bb-156.250mbe-t - 3rd overtone quartz based - 156.25 mhz kyocera, kc7050t156.250p30e00 - saw based - 156.25 mhz connor winfield (cw), p123-156.25m - 3rd overtone quartz based - 156.25 mhz silabs, si590ab-bdg - 3rd ov ertone quartz based - 156.25 mhz 4. 50 mv pk-pk sinusoidal voltage. devices used in this test: sitime, sit8208ai-33-33e-25.000000, mems based - 25 mhz ndk, nz2523sb-25.6m - quartz based - 25.6 mhz kyocera, kc2016b25m0c1ge00 - quartz based - 25 mhz epson, sg-310scf-25m0-mb3 - quartz based - 25 mhz 5. devices used in this test: same as ems test stated in note 3. 6. test conditions for shock test: ? mil-std-883f method 2002 ? condition a: half sine wave shock pulse, 500-g, 1ms ? continuous frequency measurement in 100 s gate time for 10 seconds devices used in this test: same as ems test stated in note 3 7. additional data, including setup and detailed results, is av ailable upon request to qualified customers. please contact productsupport@sitime.com .
the smart timing choice ? the smart timing choice ? document feedback form feedback form rev. 1.0 www.sitime.com sitime values your input in impr oving our documentation. click here for our online feedback form or fill out and email the form below to productsupport@sitime.com . 1. does the electrical characteri stics table provide complete i nformation? yes no if no, what paramet ers are missing? _______________________________________________________________ __________________________________ 2. is the organization of this do cument easy to follow? yes no if no, please suggest improvements that we can make: _______________________________________________________________ __________________________________ 3. is there any applic ation specific info rmation that you would like to see in this document? (check all that apply) emi termination recommendations shock and vibration performance other if other, please specify: _______________________________________________________________ __________________________________ 4. are there any errors in this document? yes no if yes, please specify (what and where): _______________________________________________________________ __________________________________ 5. do you have additional recomm endations for thi s document? _______________________________________________________________ __________________________________ name ___________________________________________________________ _____________________ title __________________________________________________________ ______________________ company ________________________________________________________ _________________________________ address ________________________________________________________ _________________________________ city / state or provin ce / postal code / country _______________ ____________________________________________ telephone __________________________________ application ____________________________________________________ ____________________________________ would you like a reply? yes no thank you for your feedback. please click the email icon in you r adobe reader tool bar and send to productsupport@sitime.com . or you may use our online feedback form .

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