View SIT8924B_8978973.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

sit 8924b automotive aec - q100 oscillator features ? aec - q100 with extended temperature range ( - 55c to 125c) ? frequencies between 1 mhz and 110 mhz accurate to 6 decimal places ? supply voltage of 1.8v or 2.25v to 3.63v ? excellent total frequency stability as low as 20 ppm ? industry best g - sensitivity of 0.1 ppb/g ? low power consumption of 3.8 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 ? rohs and reach compliant, pb - free, halogen - free and antimony - free applications ? automotive, extreme temperature and other high - rel electronics ? infotainment systems , collision detection devices , an d i n - vehicle networking ? powertrain control electrical characteristics all min and max limits are specified over temperature and rated operating voltage with 15 pf output load unless otherwise stated. typical values are at 25c and nominal supply voltage. table 1. electrical characteristics parameters symbol min. typ. max. unit condition frequency range output frequency range f 1 ? 110 mhz refer to table 13 and table 14 for a list supported frequencies frequency stability and aging frequency stability f_stab - 20 ? +20 ppm inclusive of initial tolerance at 25c, 1st year aging at 25c, and variations over operating temperature, rated power supply voltage and load (15 pf 10%). - 25 ? +25 ppm - 30 ? +30 ppm - 50 ? +50 ppm operating temperature range operating temperature range (ambient) t_use - 40 ? +85 c industrial, aec - q100 grade 3 - 40 ? +105 c extended industrial, aec - q100 grade 2 - 40 ? +125 c automotive, aec - q100 grade 1 - 55 ? +125 c extended temperature, aec - q100 supply voltage and current consumption supply voltage vdd 1.62 1.8 1.98 v a ll voltages between 2.25v and 3.63v including 2.5v, 2.8v, 3.0v and 3.3v are supported. 2.25 ? 3.63 v current consumption idd ? 4.0 4.8 ma no load condition, f = 20 mhz, vdd = 2.25v to 3.63v ? 3.8 4.5 ma no load condition, f = 20 mhz, vdd = 1.8v lvcmos output characteristics duty cycle dc 45 ? 55 % all vdds rise/fall time tr, tf ? 1.5 3 ns vdd = 2.25v - 3.63v, 20% - 80% ? 1.3 2.5 ns vdd = 1.8v, 20% - 80% output high voltage voh 90% ? ? vdd ioh = - 4 ma (vdd = 3.0v or 3.3v) ioh = - 3 ma (vdd = 2.8v and vdd = 2.5v) ioh = - 2 ma (vdd = 1.8v) output low voltage vol ? ? 10% vdd iol = 4 ma (vdd = 3.0v or 3.3v) iol = 3 ma (vdd = 2.8v and vdd = 2.5v) iol = 2 ma (vdd = 1.8v) input characteristics input high voltage vih 70% ? ? vdd pin 1, oe input low voltage vil ? ? 30% vdd pin 1, oe input pull - up impedence z_in ? 100 ? k ? pin 1, oe logic high or logic low startup and resume timing startup time t_start ? ? 10 ms measured from the time vdd reaches its rated minimum value enable/disable time t_oe ? ? 130 ns f = 110 mhz. for other frequencies, t_oe = 100 ns + 3 * cycles jitter rms period jitter t_jitt ? 1.6 2.5 ps f = 75 mhz, 2.25v to 3.63v ? 1.9 3.0 ps f = 75 mhz, 1.8v rms phase jitter (random) t_phj ? 0.5 ? ps f = 75 mhz, integration bandwidth = 900 khz to 7.5 mhz ? 1.3 ? ps f = 75 mhz, integration bandwidth = 12 khz to 20 mhz re v 1.5 december 14, 2016 www.sitime.com
sit 8924b automotive aec - q100 oscillator rev. 1 . 5 page 2 of 17 www.sitime.com table 2. pin description pin symbol functionality 1 output enable output enable h [1] : specified frequency output l: output is high impedance. only output driver is disabled. no co n- nect no connect any voltage between 0 and vdd or open [1] : specified frequency output. pin 1 has no function. 2 gnd power electrical ground [2] 3 out output oscillator output 4 vdd power power supply voltage [2] top view 1 4 oe/nc vdd 3 2 gnd out figure 1. pin assignments notes: 1. in oe mode, a pull - up resistor of 10k ? or less is recommended if pin 1 option. 2. a capacitor of value 0.1 f or higher between vdd a nd gnd is required. table 3. absolute maximum limits attempted operation outside the absolute maximum ratings may cause permanent damage to the part. actual performance of the ic is only guaranteed within the operational specifications, not at absolute maximum ratings. parameter min. max. unit storage temperature - 65 150 c vdd - 0.5 4 v electrostatic discharge ? 2000 v soldering temperature (follow standard pb free soldering guidelines) ? 260 c junction temperature [3] ? 150 c note: 3. exceeding this temperature for extended period of time may damage the device. table 4. thermal consideration [4] package 7050 142 273 30 5032 97 199 24 3225 109 212 27 2520 117 222 26 2016 152 252 36 note: 4. refer to jesd51 for ja and jc definitions, and reference layout used to determine the ja and jc values in the above table. table 5. maximum operating junction temperature [5] max operating temperature (ambient) maximum operating junction temperature 8 5c 9 5c 105c 115c 125c 135c note: 5. datasheet specifications are not guaranteed if junction temperature exceeds the maximum operating junction temperature. 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
sit 8924b automotive aec - q100 oscillator rev. 1 . 5 page 3 of 17 www.sitime.com test circuit and waveform [6] 4 1 3 2 0.1f power supply oe/nc function test point 15pf (including probe and fixture capacitance) vdd vout vdd 1k ? figure 2. test circuit 80 % vdd high pulse (th) 50 % 20% vdd period tf tr low pulse ( tl) figure 3. waveform note: 6. duty cycle is computed as duty cycle = th/period. timing diagrams 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 figure 4. startup timing (oe mode) 50% vdd vdd oe voltage clk output t _oe t_oe: time to re-enable the clock output hz figure 5. oe enable timing (oe mode only) 50 % vdd vdd oe voltage clk output t _ oe : time to put the output in high z mode hz t _ oe figure 6. oe disable timing (oe mode only) note: 7. sit8924 has ?no runt? pulses and ?no glitch? output during startup or resume.
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 4 of 1 7 www.sitime.com performance plots [8] 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0 20 40 60 80 100 1.8 v 2.5 v 2.8 v 3 v 3.3 v idd (ma) frequency (mhz) figure 7. idd vs frequency -25 -20 -15 -10 -5 0 5 10 15 20 25 -55 -35 -15 5 25 45 65 85 105 125 dut1 dut2 dut3 dut4 dut5 dut6 dut7 dut8 dut9 dut10 dut11 dut12 dut13 dut14 dut15 dut16 dut17 dut18 dut19 dut20 frequency (ppm) temperature (c) figure 8. frequency vs temperature 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 20 40 60 80 100 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v rms period jitter (ps) frequency (mhz) figure 9. rms period jitter vs frequency 45 46 47 48 49 50 51 52 53 54 55 0 20 40 60 80 100 1.8 v 2.5 v 2.8 v 3.0 v 3.3 v duty cycle (%) frequency (mhz) figure 10. duty cycle vs frequency 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) figure 11. 20% - 80% rise time vs temperature 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 fall time ( ns ) temperature ( c ) figure 12. 20% - 80% fall time vs temperature
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 5 of 1 7 www.sitime.com performance plots [8] 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) f igure 13. rms integrated phase jitter random (1 2 khz to 20 mhz) vs frequency [9] 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) fi gure 14. rms integrated 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 measured with agilent e5052b signal source analyzer. integration range is up to 5 mhz for carrier frequencies up to 40 mhz.
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 6 of 1 7 www.sitime.com programmable drive strength the sit8924 includes a programmable drive strength fe a- ture 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 interfe r- e nce (emi) by slowing down the clock rise/fall time. ? improves the downstream clock receiver?s (rx) jitter by decreasing (speeding up) the clock rise/fall time. ? ability to drive large capacitive loads while mai n- taining full swing with sharp edge rates. for more detailed information about rise/fall time control and drive strength selection, see the sitime application notes section: http://www.sitime.com/support/application - notes . emi reduction by slowing rise/fall time figure 15 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 squ are 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 pe riod. figure 15. armoni em redution as a funtion of sloer rise/fall time itter redution ith faster rise/fall time power supply noise can be a source of jitter for the dow n- stream chipset. one way to reduce this jitter is to speed up the rise/fall time of the input clock. some chipsets may also require faster rise/fall time in order to reduce their sensitivity to this type of jitter. refer to the rise/fall time tables (table 7 to table 11 ) to de termine the proper drive strength. high output load capability the rise/fall time of the input clock 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 incr eases. as an example, for a 3.3v sit8924 device with default drive strength setting, the typical rise/fall time is 1ns for 15 pf output load. the typical rise/fall time slows down to 2.6 ns when the output load increases to 45 pf. one can choose to speed up the rise/fall time to 1.83 ns by then increasing the drive strength setting on the sit8924. the sit8924 can support up to 60 pf in maximum capac i- tive loads with drive strength settings. refer to the rise/tall time tables (ta ble 7 to 11 ) to determine the proper drive strength for the desired combination of output load vs. rise/fall time . sit8924 drive strength selection tables 7 through 11 define the rise/fall time for a given capacitive load and supply voltage. 1. select the table that matches the sit8924 nominal supply voltage (1.8v, 2.5v, 2.8v, 3.0v, 3.3v). 2. select the capacitive load column that matches the application 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 guarant eed full swing of the output voltage over temperature can be calculated as follows: = 1 5 x trf _ 20 / 80 max frequency 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: SIT8924Bi e 12 - 18e - 66.666660 drive strength code is inserted here. default setting is ? - ?
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 7 of 1 7 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/fall 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 rise/fall time typ (ns) drive strength \ 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) 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 3.77 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 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
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 8 of 1 7 www.sitime.com pin 1 configuration options (oe or nc) pin 1 of the sit8924 can be factory - programmed to support two modes: output enable (oe) or no connect (nc). output enable (oe) mode in the oe mode, applying logic low to the oe pin only dis a- bles the output driver and puts it in hi - z mode. the core of the device continues to operate normally. power co n- sumption is reduced due to the inactivity of the output. when the oe pin is pulled high, the output is typically enabled in <1s . no connect (nc) mode in the nc mode, the device always 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 or nc mode. table 12. oe vs. nc oe nc active current 20 mhz (max, 1.8v) 4.5 ma 4.5 ma oe disable current (max. 1.8v) 3.8 ma n/a oe enable time at 110 mhz (max) 130 ns n/a output driver in oe disable high z n/a output on startup and oe enable the sit8924 comes with gated output. its clock output is accurate to the rated frequency stability within the first pulse from initial device startup or when the output driver is enabled. in addition, the sit8924 supports ?no runt? pulses and ?no glitch? output during startup or when the device output driver is enabled as shown in the waveform captures in figure 16 and figure 17 . figure 16. startup waveform vs. vdd figure 17. startup waveform vs. vdd (z oomed - in view of figure 16)
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 9 of 1 7 www.sitime.com dimensions and patterns package size ? 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 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 x 2.5 x 0.75 mm 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 x 3.2 x 0.75 mm 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
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 10 of 1 7 www.sitime.com d imensions and patterns package size ? 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 . 8 1 2 . 2 2 . 0 n otes: 10. top marking: y denotes manufacturing origin and xxxx denotes manufacturing lot number. the value of ?y? will depend on the assembly location of the device. 11. a capacitor of value 0.1 f or higher between vdd and gnd is required.
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 11 of 1 7 www.sitime.com ordering information the part no. guide is for reference only. to customize and build an exact part number, use the sitime par t number generator. frequency refer to the supported frequencies tables below part family ?sit 8924 ? revision letter ?b? is the revision temperature range supply voltage [ 12 ] ? 18 ? for 1 . 8 v 10 % ? 25 ? for 2 . 5 v 10 % ? 28 ? for 2 . 8 v 10 % ? 33 ? for 3 . 3 v 10 % feature pin ?e? for output enable frequency stability ?1? for 20 ppm ?2? for 25 ppm ?8? for 30 ppm ?3? for 50 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 SIT8924Ba - 12-18e - 66.666666d ?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 ?i? industrial -40oc to 85 oc ?e? ext. industrial -40oc to 105oc ?a? automotive -40oc to 125oc ?m? automotive -55oc to 125oc ?xx? for 2.5v -10% to 3.3v +10% output drive strength ??? default (datasheet limits) see tables 7 to 11 for rise/fall times ?l? ?a? ?r? ?b? ?t? ?e? ?u? ?f? ?n? for no connect note: 12. the voltage portion of the sit8924 part number consists of two characters that denote the specific supply voltage of the device. the sit8924 supports either 1.8v 10% or any voltage between 2.25v and 3.62v. in the 1.8v mode, one can simply insert 18 in the part number. in the 2.5v to 3.3v mode, two digits such as 18, 25 or 33 can be used in the part number to reflect the desired voltage. alternatively, ?xx? can be used to indicate the entire operating voltage range from 2.25v to 3.63v. table 13 . supported frequencies ( - 40c to +85c) [13 ] frequency range min. max. 1.000000 mhz 110.000000 mhz table 14 . supported frequencies ( - 40c to +105c or - 40c to +125c) [13, 14] frequency range min. max. 1.000000 mhz 61.222999 mhz 61.974001 mhz 69.795999 mhz 70.485001 mhz 79.062999 mhz 79.162001 mhz 81.427999 mhz 82.232001 mhz 91.833999 mhz 92.155001 mhz 94.248999 mhz 94.430001 mhz 94.874999 mhz 94.994001 mhz 97.713999 mhz 98.679001 mhz 110.000000 mhz table 15 . supported frequencies ( - 55c to +125c) [13, 14] frequency range min. max. 1.000000 mhz 61.222999 mhz 61.974001 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: 13. any frequency within the min and max values in the above tables are supported with 6 decimal places of accuracy. 14. please contact sitime for frequencies that are not listed in the tables above.
sit 8924b automotive aec - q100 oscillator rev. 1.5 page 12 of 1 7 www.sitime.com table 16 . ordering codes for supported tape & reel packing method 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 ? ? ? ? d e 2.5 x 2.0 ? ? ? ? d e 3.2 x 2.5 ? ? ? ? d e 5.0 x 3.2 ? ? t y ? ? 7.0 x 5.0 t y ? ? ? ?
sit 8924b automotive aec - q100 oscillator rev. 1 . 5 page 13 of 1 7 www.sitime.com table 17. additional information d ocument description download link time machine ii mems oscillator programmer http://www.sitime.com/support/time - machine - oscillator- programmer 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 profile and other manufacturing related info ht tp:// www.sitime.com/component/docman/doc_download/243 - manufacturing - notes - for - sitime - oscillators qualification reports rohs report, reliability reports, composition reports http://www.si time.com/support/quality - and- reliability performance reports additional performance data such as phase noise, current consumption and jitter for selected frequencies ht tp:// 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/appl ication - notes table 18. revision history revision release date change summary 0 . 1 0 5/19/ 20 15 final production release 1.3 03/18/2016 added the industrial temperature ? - 40c to 85c? option added support for 20 ppm frequency stability added 12 and 16 mm t&r information to table 16 1.5 12/14/2016 changed clock generator to sot23 oscillator updated logo and company address, other page layout changes sitime corporation , 5451 patrick henry drive , santa clara , ca 95054 , usa | phone: + 1 - 408 - 328 - 4400 | fax: +1 - 408 - 328 - 4439 ? sitime corporation 2016 - 2017. the information contained herein is subject to change at any time without notice. sitime assumes no responsibility or l iability 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 dis charge, neglect or accident, (iii) unauthorized modification or repairs which have been soldered or alte red during assembly and a re 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, the rmal, or electrical stress. disclaimer: sitime makes no warranty of any kind, express or implied, with regard to this material, and specifically disclaims any and all expre ss or implied warranties, either in fact or by operation of law, statutory or otherwise, including the implied warranties of merch antability and fitness for use or a particular 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 component, 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 nuclear facilities or for use in other mission - critical 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 so ftware, firmware, 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 documents, 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, translation, compilation, or representation of this material shall be strictly prohibited.
rev. 1 . 5 page 14 of 1 7 www.sitime.com silicon mems outperforms quartz supplemental information the supplemental information section is not part of the datasheet and is for informational purposes on ly.
rev. 1 . 5 page 15 of 1 7 www.sitime.com silicon mems outperforms quartz silicon mems outperforms quartz 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 episeal? mem s best in class: ? sitime?s mems resonators are vacuum sealed using an advanced episeal? process, which eliminates foreign particles and improves long term aging and reliability ? world - class mems and cmos design expertise 28 38 1,140 epsn idt episeal mems reliability (million hours) 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 episeal mems best in class: ? sitime?s mems resonators are vacuum sealed using an advanced episeal? process, which eliminates foreign particles and improves long term aging and reliability ? inherently better immunity of electrostatically driven mems resonator 1.5 3.5 3 8 0 2 4 6 8 10 1-year 10-year aging ( ppm) mems vs. quartz aging episeal mems oscillator quartz oscillator figu re 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 episeal mems best in class : ? internal differential architecture for best common mode noise rejection ? electrostatically driven mems resonator is more immune to ems 0.0 0.1 1.0 10.0 100.0 10 100 1000 vibration sensitivity (ppb/g) vibration frequency (hz) txc eps cw ca slab episeal mems 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 episeal mems best in class: ? on - chip regulators and internal differential arch i- tecture for common mode noise rejection ? mems resonator i s paired with advanced analog cmos ic figure 4. power supply noise rejection [4]
rev. 1 . 5 page 16 of 1 7 www.sitime.com silicon mems outperforms quartz 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. f igure 5 shows a compa r- ison of vibration robustness. why is episeal mems 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 fig ure 6. why is episeal mems 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 r o- bust design figure 6. shock robustness [6] figure labels: ? txc = txc ? epson = epsn ? connor winfield = cw ? kyocera = kyca ? silabs = slab ? sitime = episeal mems
rev. 1 . 5 page 17 of 1 7 www.sitime.com silicon mems outperforms quartz notes: 1. data source: reliability documents of named companies. 2. data source: sitime and quartz oscillator devices datasheets. 3. test conditions for electro magne tic 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 pos ition: center aligned to antenna devices used in this test: label manufacturer part number technology episeal mems sitime sit9120ac - 1d2 - 33e156.250000 mems + pll epsn epson eg- 2102ca156.2500m - phpal3 quartz, saw txc txc bb- 156.250mbe -t quartz, 3 rd overtone cw conner winfield p123 - 156.25m quartz, 3 rd overtone kyca avx kyocera kc7050t156.250p30e00 quartz, saw slab silab 590ab - bdg quartz, 3 rd overtone + pll 4. 50 mv pk - pk sinusoidal voltage. devices used in this test: label manufacturer part number technology episeal mems sitime sit8208ai - 33 - 33e - 25.000000 mems + pll ndk ndk nz2523sb - 25.6m quartz kyca avx kyocera kc2016b25m0c1ge00 quartz epsn epson sg- 310scf - 25m0 - mb3 quartz 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 available upon request to qualified customer.

▲Up To Search▲

Price & Availability of SIT8924B

	To Download SIT8924B Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .