SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice Description Features 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 applications including: 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 Tablets Fitness bands Health and medical monitoring Wearables Portable audio Input devices IoT devices Operating temperature from -40C to 85C. Contact SiTime for -40C to 105C option Frequency stability as low as 100 ppm. Contact SiTime for 25 ppm or 50 ppm options 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 Frequency Stability First Year Aging f_tol -15 - +15 ppm Frequency offset at 25C post reflow 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. 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 Contact SiTime for 3.3V option Current Consumption[1] IDD - 60 - A f = 3.072 MHz, no load - 110 130 A f = 6.144 MHz, no load - 230 270 A f = 6.144 MHz, 10 pF load - 160 - A f = 12 MHz, no load - 0.7 1.3 A ST pin = HIGH, output is weakly pulled down Standby Current I_std LVCMOS Output Characteristics Duty Cycle DC 45 - 55 % T_r, T_f - 4 8 ns Output High Voltage VOH 90% - - VDD 20% - 80%. Contact SiTime for other programmable rise/fall options IOH = -0.5 mA Output Low Voltage VOL - - 10% VDD IOL = 0.5 mA Rise/Fall Time Input Characteristics Input High Voltage VIH 80% - - VDD Input Low Voltage VIL - - 20% VDD In-slew 10 - - V/s Z_in 300 - - k Active mode (ST pin = LOW) 2.5 4 - M Standby mode (ST pin = HIGH) Input Slew Rate Input Pull-down Impedance SiTime Corporation Rev. 1.11 990 Almanor Avenue, Sunnyvale, CA 94085 (408) 328-4400 www.sitime.com Revised Sep 16, 2016 SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice 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 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 T_jitt - 75 110 ps f = 6.144 MHz RMS Phase Jitter T_phj - 0.8 2.5 ns f = 6.144 MHz, Integration bandwidth = 100 Hz to 40 kHz Note 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. Table 2. Pin Description Top View Pin Symbol Functionality 1 ST Input 2 OUT Output 3 VDD Power Supply voltage. Bypass with a 0.01F X7R capacitor. 4 GND Power Connect to ground L: Specified frequency output H: Output is low (weak pull down). Device goes to the standby mode. Supply current reduces to I_std. ST 1 4 GND OUT 2 3 VDD LVCMOS clock output Figure 1. Pin Assignments 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 Continuous Power Supply Voltage Range (VDD) Short Duration Maximum Power Supply Voltage (VDD) <30 seconds Continuous Maximum Operating Temperature Value Unit -0.5 to 3.63 V 4.0 V 105 C 30 seconds 125 C Human Body Model (HBM) ESD Protection JESD22-A115 2000 V Charge-Device Model (CDM) ESD Protection JESD22-C101 750 V TA = 25C 200 V g Short Duration Maximum Operating Temperature Machine Model (MM) ESD Protection Latch-up Tolerance JESD78 Compliant Mechanical Shock Resistance MII 883, Method 2002 10,000 Mechanical Vibration Resistance MII 883, Method 2007 70 g 150 C -65 to 150 C 260 C 1508 CSP Junction Temperature Storage Temperature Soldering Temperature (follow standard Pb free soldering guidelines) Rev. 1.11 Page 2 of 9 - www.sitime.com SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice Block Diagram VDD CMOS Control Regulator ST OUT Frequency Synthesizer Oscillator Circuit MEMS OUT DRV GND Figure 2. SiT8021 Block Diagram Device Operating Modes and Outputs Output During Startup and Resume The SiT8021 supports a 0.7 A standby mode for batterypowered 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. 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. MODE OUTPUT IDD Example LOW Active Specified frequency 60 A @ 3.072 MHz 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. FLOAT Active with 200 k internal pull-down Specified frequency 60 A @ 3.072 MHz The first clock pulse after startup or resume is accurate to the rated stability. HIGH Standby Hi-Z, pulled-down with 1 M impedence 1.3 A Table 4. Operating Modes and Output States ST Pin Low Power Design Guidelines For high EM noise environments, we recommend the following design guidelines: Active Mode * 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 oscillator. * Place a solid GND plane underneath the SiTime oscillator to shield the oscillator from noisy traces on the other board layers. 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. Manufacturing Guidelines The output driver of the device in the standby mode is pulled-down with 1 M impedance. Rev. 1.11 Page 3 of 9 * No Ultrasonic or Megasonic Cleaning: Do not subject the SiT8021 to an ultrasonic or megasonic cleaning 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. Tested 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: http://www.sitime.com/component/docman/doc_download /243-manufactuing-notes-for-sitime-oscillators www.sitime.com SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice Test Circuit and Waveform tr Test Point VDD tf 80% Vdd OUT 50% Power Supply 15pF (including probe and fixture capacitance) 0.01F GND ST 20% Vdd High Pulse (TH) Low Pulse (TL) Period Figure 4. Waveform[3] Figure 3. Test Circuit Note: 3. Duty Cycle is computed as Duty Cycle = TH/Period. Timing Diagram Vdd Min. Operating Voltage Vdd ST - Pin 1 Voltage 50% Vdd VDD - Pin 4 Voltage NO Glitch first cycle T_start CLK Output T_resume CLK Output T_resume: Time to valid clock output from the time ST pin crosses 50% threshold T_start: Time to valid clock output from power on Figure 5. Startup Timing[4, 5] Figure 6. Resume Timing[4, 5] Vdd ST - Pin 1 Voltage 50% Vdd CLK Output T_Stdby HiZ T_Stdby: Time for output to go high-Z from the time ST pin crosses 50% threshold Figure 7. Standby Timing[4] Notes: 4. SiT8021 supports "no runt" pulses and "no glitch" output during startup or resume. 5. SiT8021 supports gated output which is accurate within rated frequency stability from the first cycle. Rev. 1.11 Page 4 of 9 www.sitime.com SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice Performance Plots[6] 400 900 350 800 700 300 600 Idd (A) Idd (A) 250 200 150 500 400 300 100 200 50 100 0 0 0 5 10 15 20 25 0 5 Frequency (MHz) Figure 8. Idd vs Frequency without load 100.0 10 15 20 25 Frequency (MHz) DUT1 DUT2 DUT3 DUT4 DUT5 DUT6 DUT7 DUT8 DUT9 DUT10 Figure 9. Idd vs Frequency with 10pF load 600 75.0 RMS period jitter (ps) Frequency Stability (ppm) 500 50.0 25.0 0.0 -25.0 -50.0 400 300 200 100 -75.0 0 -100.0 -40 -20 0 20 40 60 80 0 5 Temperature (C) 10 15 20 25 Frequency (MHz) Figure 10. Frequency vs Temperature Figure 11. RMS Period Jitter vs Frequency 55 2.3 53 IPJ (ns) Duty cycle (%) 1.9 51 49 1.1 47 45 0.7 0 5 10 15 20 25 0 Frequency (MHz) 5 10 15 20 25 Frequency (MHz) Figure 13. RMS Phase Jitter Random vs Frequency[7] Figure 12. Duty Cycle vs Frequency Rev. 1.11 1.5 Page 5 of 9 www.sitime.com SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice 7 7 6 6 5 5 Fall time (ns) Rise time (ns) Performance Plots[6] 4 3 4 3 2 2 1 1 0 0 -40 -15 10 35 60 85 Temperature (C) -40 -15 10 35 60 85 Temperature (C) Figure 14. Rise Time vs Temperature[8] Figure 15. Fall Time vs Temperature[8] Notes: 6. All data is measured at room temperature, unless otherwise stated. 7. Data is measured with 15 pF load. 8. Integration range is from 100 Hz to 40 kHz. Rev. 1.11 Page 6 of 9 www.sitime.com SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice Dimensions and Patterns Package Size - Dimensions (Unit: mm) Recommended Land Pattern (Unit: mm) 1.55 x 0.85 mm CSP 1.54 0.04 #4 #3 #4 0.84 0.04 Top View #3 #4 #1 0.315 0.015 #2 #1 #2 #2 #1 Recommend 4-mil (0.1mm) stencil thickness Side View Rev. 1.11 #3 Bottom View Page 7 of 9 www.sitime.com SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice Ordering Information SiT8021AC -J4-18S - 6 . 1 4 4 0 0 0 D Packaging Part Family "D": 8 mm Tape & Reel, 3ku reel "E": 8 mm Tape & Reel, 1ku reel "S": 8 mm Tape & Reel, 10ku reel "SiT8021" Revision Letter "A" is the revision Frequency Refer to frequency list below Temperature Range[9] "C" Commercial, -20 to 70C "I" Industrial, -40 to 85C Feature Pin "S" for Standby Output Drive Strength[10] Supply Voltage[11] "-" Default "18" for 1.8V 10% Package Size Frequency Stability[12] "J" 1.5 x 0.8 mm x mm "4" for 100 ppm Notes: 9. Contact SiTime for -40 to 105C option. 10. Contact SiTime for other drive strength options that result in different rise/fall time for any given output load. 11. Contact SiTime for 3.3V option. 12. Contact SiTime for 25 or 50 ppm options. Table 5. List of Standard Frequencies [13] 2.048 MHz 19.2 MHz 4 MHz 24 MHz 6.144 MHz 26 MHz 8 MHz 12 MHz 12.288 MHz 16 MHz Notes: 13. All frequencies from 1 to 26 MHz are in production. Contact your SiTime distributors or SiTime sales offices for minimum order quantity requirement. Rev. 1.11 Page 8 of 9 www.sitime.com SiT8021 Ultra-Small, 1 to 26 MHz Oscillator The Smart Timing Choice Revision History Table 5. Datasheet Version and Change Log Version Release Date 0.1 12/15/14 Change Summary Advance Information 0.2 1/27/15 * * * * * 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 3/31/15 * * * * 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 5/22/15 * * * * * Added typical values for active and standby current Added current consumption for additional frequencies Changed 50 ppm option to Contact SiTime Added manufacturing guideline Other miscellaneous format and footnote changes 1.0 11/18/15 * 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 2/19/16 * Added 10 Standard frequencies to the ordering information 1.11 9/16/16 * Updated the table.5 list of standard frequencies * Added a graph of Idd vs Frequency without load to the performance plots section (c) 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 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 electrical stress. 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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 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. Rev. 1.11 Page 9 of 9 www.sitime.com