SIT8021 1 to 26 mhz, ultra - small power oscillator description the SIT8021 is the industry's smallest and the lowest power mhz oscillator. with 0.1 mw of active power consumption at 3.072 mhz output frequency, this power oscillator enables longer battery life for a wearable, iot or mobile device compared to a quartz - based oscillator or resonator. the device comes in the smallest 1.5 mm x 0.8 mm package . the unique combination of ultra - low power, ultra- small package and flexible output frequency makes it ideal for power sensitive and space constrained app lications. applications tablets fitness bands health and medical monitoring wearables portable audi o input devices iot devices features ultra - low current consumption of 60 a at 3.072 mhz ultra - small 1.5 mm x 0.8 mm package 1 to 26 mhz with 6 decimal places of accuracy operating temperature from - 40c to 85c frequency stability as low as 100 ppm programmable output drive strength for best emi or driving multiple loads ultra - light weight of 1.28 mg 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 stated. typical values are at 25c and nominal supply voltage. parameters symbol min. typ. max. unit condition frequency range output frequency range f 1.000000 26.000000 mhz frequency stability and aging initial tolerance f_tol - 15 ? +15 ppm frequency offset at 25c post reflow frequency stability f_stab - 100 ? +100 ppm inclusive of initial tolerance, and variations over operating temperature, rated power supply voltage and output load. contact sitime for 25 or 50 ppm options. first year aging f_1year - 3 +3 ppm at 25c operating temperature range operating temperature range t_use - 20 ? +70 c extended commercial - 40 ? +85 c industrial. contact sitime for - 40c to 105c option. supply voltage and current consumption supply voltage vdd 1.62 1.8 1.98 v 2.25 ? 3.63 v any voltage from 2.25 to 3.63v current consumption [1, 3] idd ? 60 ? a f = 3.072 mhz, vdd = 1.8v, no load ? 110 130 a f = 6.144 mhz, vdd = 1.8v, no load ? 230 270 a f = 6.144 mhz, vdd = 1.8v, 10 pf load ? ? 160 a f = 6.144 mhz, vdd = 2.25v to 3.63v, no load ? 160 ? a f = 12 mhz, vdd = 1.8v, no load standby current [3] i_std ? 0.7 1.3 a vdd = 1.8v, st pin = high, output is weakly pulled down ? ? 1.5 a vdd = 2.25v to 3.63v, st pin = high, output is weakly pulled down rev 1 . 2 september 28, 2017 www.sitime.com
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 2 of 10 www.sitime.com table 1. electrical characteristics (continuous) parameters symbol min. typ. max. unit condition lvcmos output characteristics duty cycle dc 45 ? 55 % rise/fall time [3] t_r, t_f ? 4 8 ns vdd = 1.8v, 20% - 80%. contact sitime for other programmable rise/fall options ? ? 8 ns vdd = 2.25v to 3.63v, 20% - 80%. contact sitime for other programmable rise/fall options output high voltage voh 90% ? ? vdd ioh = - 0.5 ma (vdd = 1.8v) ioh = - 1.2 ma (vdd = 2.25v to 3.63v) output low voltage vol ? ? 10% vdd iol = 0.5 ma ( vdd = 1.8v) iol = 1.2 ma (vdd = 2.25v to 3.63v) input characteristics input high voltage vih 80% ? ? vdd input low voltage vil ? ? 20% vdd input slew rate in - slew 10 ? ? v/s input pull - down impedance z_in 300 ? ? k active mode (st pin = low), vdd = 1.8v 270 ? ? k active mode (st pin = low), vdd = 2.25v to 3.63v 2.5 ? ? m standby mode (st pin = high), vdd = 1.8v 1.3 ? ? m standby mode (st pin = high), vdd = 2.25v to 3.63v startup, standby and resume timing startup time t_start ? 75 150 ms measured from the time vdd reaches 90% of its final value standby time t_stdby ? ? 20 s measured from the time st pin crosses 50% threshold resume time t_resume ? 2 3 ms measured from the time st pin crosses 50% threshold jitter rms period jitter [3] t_jitt ? 75 110 ps f = 6.144 mhz, vdd = 1.8v ? ? 110 ps f = 6.144 mhz, vdd = 2.25v to 3.63v rms phase jitter [3] t_phj ? 0.8 2.5 ns f = 6.144 mhz, vdd = 1.8v, integration band width = 100 hz to 40 khz [2] notes: 1. current consumption with load is a function of the output frequency and output load. for any given output frequency, the capacitive loading will increase current consumption equal to c_load*vdd*f(mhz). 2. max spec inclusive of 25 mv peak - to - peak sinusoidal noise on vdd. noise frequency 100 hz to 20 mhz. 3. refer to the performance plot section for typical values at 2.5, 2.8, 3.0 and 3.3v condition table 2 . pin description pin symbol functionality 1 st input l: specified frequency output h: output is low (weak pull down). device goes to the standby mode. supply current reduces to i_std. 2 out output lvcmos clock output 3 vdd power supply voltage. bypass with a 0.01f x7r capacitor. 4 gnd power connect to ground top view gnd vdd out st 1 4 2 3 figure 1 . pin assignments
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 3 of 10 www.sitime.com 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 test condition value unit continuous power supply voltage range (vdd) - 0.5 to 3.63 v short duration maximum power supply voltage (vdd) <30 seconds 4.0 v continuous maximum operating temperature 105 c short duration maximum operating temperature 30 seconds 125 c human body model (hbm) esd protection jesd22 - a115 2000 v charge - device model (cdm) esd protection jesd22 - c101 750 v machine model (mm) esd protection t a = 25c 200 v latch - up tolerance jesd78 compliant mechanical shock resistance mii 883, method 2002 10,000 g mechanical vibration resistance mii 883, method 2007 70 g 1508 csp junction temperature 150 c storage temperature - 65 to 150 c soldering temperature (follow standard pb free soldering guidelines) ? 260 c
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 4 of 10 www.sitime.com block diagram d evice operating modes and outputs the SIT8021 supports a 0.7 a standby mode for battery - powered and other power sensitive applications. the switching between the active and standby modes is controlled by the logic level on the st pin as shown in the table below. table 4 . operating modes and output states st pin mode output idd example low active specified frequency 60 a @ 3.072 mhz float active with 200 k ? internal pull - down specified frequency 60 a @ 3.072 mhz high standby hi- z, pulled - down with 1 m ? impedence 1.3 a active mode the SIT8021 operates in the active mode when the st pin is at logic low or float. in the active mode, the device uses the on - chip frequency synthesizer to generate an output from the internal mems resonator reference. the frequency of the output is factory programmed based on the device ordering code. standby mode the SIT8021 operates in the standby mode when the st pin is at logic high. in the standby mode, all internal circuits with the exception of the mems oscillator circuit and the st pin detection logic are turned off to reduce power consumption. while in standby mode, the input impedance of the st pin is increased to further reduce system - level power consumption. the output driver of the device in the standby mode i s pulled - down with 1 m impedance. output during startup and resume the SIT8021 starts up with the output disabled. the output is enabled once all internal circuit blocks are active, and logic low or float is detected on the st pin. as shown in table 4 , logic high at the st pin forces the SIT8021 into the ?standby? state, causing the output to disable. upon pulling the st pin low, the device enters the ?resume? state, keeping the output disabled. once the ?resume? state ends, the device output enables. the first clock pulse after startup or resume is accurate to the rated stability. low power design guidelines for high em noise environments, we recommend the following design guidelines: ? place oscillator as far away from em noise sources as possible (e.g., high - voltage switching regulators, motor drive control). ? route noisy pcb traces, such as digital data lines or high di/dt power supply lines, away from the sitime osci llator. ? place a solid gnd plane underneath the sitime oscillator to shield the oscillator from noisy traces on the other board layers. manufacturing guidelines ? no ultrasonic or megasonic cleaning: do not subject the SIT8021 to an ultrasonic or megasonic cl eaning environment. permanent damage or long - term reliability issues to the device may occur in such an event. ? applying board - level underfill (bluf) to the device is acceptable, but will cause a slight shift of few ppm in the initial frequency tolerance. t ested with uf3810, uf3808, and fp4530 underfill. ? reflow profile, per jesd22 - a113d. ? for additional manufacturing guidelines and marking/ tape - reel instructions, click on the following link: sitime.com/component/docman/doc_download /243 - manufactuing - notes - for - sitime - oscillators figure 2 . SIT8021 block d iagram
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 5 of 10 www.sitime.com test circuit and waveform 0 . 01 f power supply st test point 15pf (including probe and fixture capacitance) vdd out gnd figure 3 . test circuit 80 % vdd high pulse ( th ) 50 % 20 % vdd period tf tr low pulse ( tl ) figure 4 . waveform [ 4 ] note: 4. duty cycle is computed as duty cycle = th/period. timing diagram min . operating voltage vdd vdd - pin 4 voltage clk output t_start t_start: time to valid clock output from power on no glitch first cycle figure 5 . startup timing [5, 6] 50% vdd vdd st - pin 1 voltage clk output t_resume t_resume: time to valid clock output from the time st pin crosses 50% threshold figure 6 . resume timing [5, 6] 50 % vdd vdd st ? pin 1 voltage clk output t _ stdby : time for output to go high - z from the time st pin crosses 50 % threshold hiz t _ stdby figure 7 . standby timing [5] notes: 5. SIT8021 supports ?no runt? pulses and ?no glitch? output during startup or resume. 6. SIT8021 supports gated output which is accurate within rated frequency stability from the first cycle.
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 6 of 10 www.sitime.com performance plots [7] figure 8. idd vs frequency without load figure 9. idd vs frequency with 10pf load figure 10. frequency vs temperature figure 11. rms period jitter vs frequency figure 12. duty cycle vs frequency figure 13. rms phase jitter random vs frequency [8] 0 50 100 150 200 250 300 350 400 0 5 10 15 20 25 idd (a) frequency (mhz) 0 100 200 300 400 500 600 700 800 900 0 5 10 15 20 25 idd (a) frequency (mhz) -100.0 -75.0 -50.0 -25.0 0.0 25.0 50.0 75.0 100.0 -40 -20 0 20 40 60 80 frequency stability (ppm) temperature ( c) dut1 dut2 dut3 dut4 dut5 dut6 dut7 dut8 dut9 dut10 0 100 200 300 400 500 600 0 5 10 15 20 25 rms period jitter (ps) frequency (mhz) 45 47 49 51 53 55 0 5 10 15 20 25 duty cycle (%) frequency (mhz) 0.7 1.1 1.5 1.9 2.3 0 5 10 15 20 25 ipj (ns) frequency (mhz)
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 7 of 10 www.sitime.com figure 14. rise time vs temperature [9] figure 15. fall time vs temperature [9] notes: 7. all data is measured at room temperature, unless otherwise stated. 8. integration range is from 100 hz to 40 khz. 9. data is measured with 15 pf load. 0 1 2 3 4 5 6 7 -40 -15 10 35 60 85 rise time (ns) temperature ( c) 0 1 2 3 4 5 6 7 -40 -15 10 35 60 85 fall time (ns) temperature ( c)
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 8 of 10 www.sitime.com dimensions and patterns package size ? dimensions (unit: mm) recommend ed land pattern (unit: mm) # 1 #2 #4 #3 ( soldermask openings shown with dashed line around nsmd pad) recommended 4 - mil (0.1mm) stencil thickness
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 9 of 10 www.sitime.com ordering information frequency refer to frequency list below part family ?SIT8021? revision letter ?a? is the revision temperature range ?i? industrial, -40 to 85 oc supply voltage ?18? for 1.8v 10% ?xx? for 2.25v to 3.63v packaging feature pin ?s? for standby ?c? commercial, -20 to 70 oc frequency stability ?4? for 100 ppm package size SIT8021ac - j 4-18s - 6 . 144000d ?j? 1.5 x 0.8 mm x mm ?d?: 8 mm tape & reel, 3ku reel ?e?: 8 mm tape & reel, 1ku reel ?s?: 8 mm tape & reel, 10ku reel output drive strength [10] ??? default notes: 10. contact sitime for other drive strength options that result in different rise/fall time for any given output load. table 5 . list of standard frequencies [11 ] 2.048 mhz 4 mhz 6.144 mhz 8 mhz 12 mhz 12.288 mhz 16 mhz 19.2 mhz 24 mhz 26 mhz notes: 11. all frequencies from 1 to 26 mhz are in production. contact sitime for minimum order quantity requirement.
sit 8021 1 to 26 mhz, ultra - small power oscillator rev 1.2 page 10 of 10 www.sitime.com table 6 . revision history version release date change summary 0.1 12/15/ 20 14 advance information 0.2 1/27/ 20 15 updated csp dimension tolerance removed 2.0 mm x 1.6 mm package changed to 6.144 mhz as the reference frequency for jitter, idd and other relevant parameters changed resume time (max) to 5 ms changed the parameter psnr to power supply noise sensitivity and specified in rms 0.3 0 3/31/ 20 15 changed vil and vih values in the ec table reduced standby time in the ec table revised phase jitter condition to include power supply noise sensitivity removed power supply noise spec 0.9 0 5/22/ 20 15 added typical values for active and standby current added current consumption for additional frequencies changed 50 ppm option to contact sitime added manufacturing guideline o ther miscellaneous format and footnote changes 1.0 11/18/ 20 15 revised initial tolerance, current consumption, standby current, input high/low voltage, input pull - down impedance, startup/resume time and rms period/phase jitter in table.1 added performance plots 1.1 0 2/19/ 20 16 added 10 standard frequencies to the ordering information 1.11 0 9/16/ 20 16 updated the table.5 list of standard frequencies added a graph of idd vs frequency without load to the performance plots section 1.2 0 9/ 28/ 20 17 added 2.25 to 3.63v supply voltage option updated logo and company address, other page layout changes added package dimension table to the dimensions and patterns section sitime corporation , 5451 patrick henry drive , santa clara , ca 95054 , usa | phone: + 1 - 408 - 328 - 4400 | fax: +1 - 408 - 328 - 4439 ? sitime corporation 201 4 - 2017. the information contained herein is subject to change at any time without notice. sitime assumes no responsibility or liability f or 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 emb odied in a sitime product, (ii) misuse or abuse including static discharge, neglect or accident, (iii) unauthorized modification or repairs which have been soldered or alte red 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, 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 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 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 appli cations 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 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.
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