SIT1572AI-J3-33E-DCC-32.768Y

SiT1572 µPower, Ultra-Small 32.768 kHz ±50 ppm Oscillator Features ◼ ◼ ◼ ◼ ◼ ◼ ◼ ◼ Applications 32.768 kHz µPower oscillator ±10 PPM Initial tolerance, ±50 ppm over temperature Smallest Footprint: 1.2 mm2 ▪ 1.5 x 0.8 mm CSP ▪ No external bypass cap required ▪ Output drives multiple loads and eliminates discrete XTALs Improved stability reduces system power with fewer network timekeeping updates Ultra-low power: 4.5 µA Supply voltage range: 1.62 V to 3.63 V Operating temperature ranges: -40°C to +85°C Pb-free, RoHS and REACH compliant ◼ ◼ ◼ ◼ Health and wellness monitors Wireless connectivity sleep clock ULP input devices RTC reference clock Electrical Specifications Table 1. Electrical Characteristics Conditions: Min/Max limits are over temperature, Vdd = 1.8 V ±10%, unless otherwise stated. Typicals are at 25°C and Vdd = 1.8 V. Parameter Symbol Min. Typ. Max. Unit Condition Frequency and Stability Output Frequency FOUT Total Frequency Stability[1] F_stab First Year Frequency Aging F_aging 32.768 -10 1 -50 kHz 10 ppm TA = 25°C 50 ppm TA = -40°C to +85°C ppm TA = 25°C ±1 Jitter Performance Period Jitter PJ 2.5 4 nsRMS Cycles = 10,000, Per JEDEC standard 65B Supply Voltage and Current Consumption Operating Supply Voltage Vdd 1.8 3.63 V No Load Supply Current ldd 4 5.3 µA Vdd = 1.8 V t_start 135 300 ms Measured when supply reaches 90% of final Vdd, to the first output pulse Start-up Time at Power-up 1.62 Operating Temperature Range Operating Temperature Range Op_Temp -40 85 °C LVCMOS Output Output Rise/Fall Time Output Clock Duty Cycle tr, tf 9 DC 45 Output Voltage High VOH 90% Output Voltage Low VOL 20 55 10% ns 10-90% (Vdd), 15 pF Load % Vdd IOH = -1 μA Vdd IOL = 1 μA Note: 1. Relative to 32.768 kHz, includes initial tolerance, over temp stability, 3x reflow, Vdd range, board-level underfill, and 20% load variation. Tested with Agilent 53132A frequency counter. Measured with 100 ms gate time for accurate frequency measurement. Rev 1.0 12 April 2021 www.sitime.com SiT1572 µPower, Ultra-Small 32.768 kHz ±50 ppm Oscillator Table 2. Pin Description CSP Pin 1 2 Top View Symbol I/O Functionality NC Internal Test CLK Out OUT Vdd Power Supply Operates from nominal supply voltages between 1.8V to 3.3V. Under normal operating conditions, Vdd does not require external bypass/decoupling capacitor(s). SiT1572 includes on-chip filtering capacitors. GND Power Supply Ground Connect to ground. NC 1 4 GND CLK Out 2 3 VDD 32.768 kHz, LVCMOS compatible output. Drive strength is sufficient to drive multiple low-power loads. 3 4 No Connect. Leave floating. Pin 1 is for internal testing and is designed to be left floating. Figure 1. Pin Assignment 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 Continuous Power Supply Voltage Range (Vdd) Unit -0.5 to 4.0 V 105 °C ≤ 30 minutes 125 °C Human Body Model (HBM) ESD Protection JESD22-A114 2000 V Charge-Device Model (CDM) ESD Protection JESD22-C101 750 V Machine Model (MM) ESD Protection JESD22-A115 300 V Continuous Maximum Operating Temperature Range Short Duration Maximum Operating Temperature Range Latch-up Tolerance JESD78 Compliant Mechanical Shock Resistance Mil 883, Method 2002 20,000 g Mechanical Vibration Resistance Mil 883, Method 2007 70 g 150 °C -65 to 150 °C 1508 CSP Junction Temperature Storage Temperature System Block Diagram VDD GND NVM NC Driver CLK Out Figure 2. SiT1572 Block Diagram Rev 1.0 Page 2 of 7 www.sitime.com SiT1572 µPower, Ultra-Small 32.768 kHz ±50 ppm Oscillator Description Frequency Stability The SiT1572 is an ultra-small, micropower, 32.768 kHz oscillator in a CSP-4 package. Typical supply current is 4.5 µA under no load condition. The SiT1572 oscillator is Factory trimmed to 32.768 kHz at room temperature and internally compensated over temperature. The result is a very accurate oscillator at room temperature and over temperature. Unlike quartz crystals that have a classic tuning fork parabola temperature curve with a 25°C turnover point with a 0.04 to 0.06 ppm/°C2 temperature coefficient, the SiT1572 error is corrected over temperature with an active temperature correction circuit. The result is 100 ms. Shorter gate times may lead to inaccurate measurements. Page 3 of 7 www.sitime.com SiT1572 µPower, Ultra-Small 32.768 kHz ±50 ppm Oscillator Typical Operating Curves (TA = 25°C, Vdd = 1.8 V, unless otherwise stated) No Vdd bypass 10 nF Vdd bypass Figure 3. LVCMOS Output Swing (Vdd = 1.8 V) Rev 1.0 Figure 4. Power Supply Noise rejection (PSNR) Page 4 of 7 www.sitime.com SiT1572 µPower, Ultra-Small 32.768 kHz ±50 ppm Oscillator Dimensions and Patterns Package Size – Dimensions (Unit: mm) Recommended Land Pattern (Unit: mm) #4 #3 #2 #1 (soldermask openings shown with dashed line around NSMD pad) Recommended 4-mil (0.1mm) stencil thickness Manufacturing Guidelines 1) No Ultrasonic or Megasonic cleaning: Do not subject SiT1572 to an ultrasonic or megasonic cleaning environment. Permanent damage or long term reliability issues may occur. 2) Applying board-level underfill and overmold is acceptable and will not impact the reliability of the device. 3) Reflow profile, per JESD22-A113D. Rev 1.0 4) The SiT1572 CSP includes a protective, opaque polymer top-coat. If the SiT1572 will see intense light, especially in the 1.0-1.2 µm IR spectrum, we recommend a protective “glob-top” epoxy or other cover to keep the light from negatively impacting the frequency stability. 5) For additional manufacturing guidelines and marking/tape-reel instructions, refer to SiTime Manufacturing Notes. Page 5 of 7 www.sitime.com SiT1572 µPower, Ultra-Small 32.768 kHz ±50 ppm Oscillator Ordering Information SiT1572AI-J3-33E-DCC-32.768Q Part Family Packaging “SiT1572” “Q”: 8 mm Tape & Reel, 5 ku reel “S”: 8 mm Tape & Reel, 10 ku reel “D”: 8 mm Tape & Reel, 3 ku reel “E”: 8 mm Tape & Reel, 1 ku reel Samples in cut Tape Revision Letter “A”: is the revision Temperature Range “I”: lndustrial, -40 to 85ºC Output Frequency 32.768 Package Size “J”: 1.5 mm x 0.8 mm CSP LVCMOS Output Supply Voltage (Vdd) Frequency Stability “3”: ±50 ppm “18E”: 1.8 V ±10% “25E”: 2.5 V ±10% “30E”: 3.0 V ±10% “33E”: 3.3 V ±10% For applications that require operation over wide range, enter the option that corresponds to the highest supply voltage. Rev 1.0 Page 6 of 7 www.sitime.com SiT1572 µPower, Ultra-Small 32.768 kHz ±50 ppm Oscillator Table 4. Revision History Version Release Date Change Summary 0.9 24-Jan-2018 Preliminary Release 1.0 12-Apr-2021 Added Option “D” for 3ku reels to the Ordering Information Updated hyperlinks, trademarks, date format and layout formatting SiTime Corporation, 5451 Patrick Henry Drive, Santa Clara, CA 95054, USA | Phone: +1-408-328-4400 | Fax: +1-408-328-4439 © SiTime Corporation 2018-2021. The information contained herein is subject to change at any time without notice. SiTime assumes no responsibility or liabili ty 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 1.0 Page 7 of 7 www.sitime.com