SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Features Applications Factory programmable from 32.768 kHz down to 1 Hz <20 ppm frequency tolerance Smallest footprint in chip-scale (CSP): 1.5 x 0.8 mm Pin-compatible to 2.0 x 1.2 mm XTAL SMD package Ultra-low power: <1 A Vdd supply range: 1.5 V to 3.63 V over -55C to +85C Supports low-voltage battery backup from a coin cell or supercap Oscillator output eliminates external load caps Internal filtering eliminates external Vdd bypass cap NanoDriveTM programmable output swing for lowest power Pb-free, RoHS and REACH compliant Mobile Phones Tablets Health and Wellness Monitors Fitness Watches Sport Video Cams Wireless Keypads Ultra-Small Notebook PC Pulse-per-Second (pps) Timekeeping RTC Reference Clock Battery Management Timekeeping Electrical Specifications Table 1. Electrical Characteristics Parameter Symbol Min. Typ. Max. Unit Condition Frequency and Stability Programmable Output Frequency 1.00 32768.0 Hz Factory programmed between 1 and 32.768 kHz in powers of 2 Frequency Stability Frequency Tolerance[1] F_tol Frequency Stability[2] F_stab 20 ppm TA = 25C, post reflow, includes underfill, Vdd: 1.5 V - 3.63 V 75 ppm TA = -10C to +70C, Vdd: 1.5 V - 3.63 V 100 TA = -40C to +85C, Vdd: 1.5 V - 3.63 V 150 TA = -55C to +85C, Vdd: 1.5 V - 3.63 V TA = -10C to +70C, Vdd: 1.2 V - 1.5 V 250 25C Aging -1 1 ppm 1st Year Supply Voltage and Current Consumption Operating Supply Voltage Core Operating Current [3] Vdd 1.2 3.63 V TA = -10C to +70C 1.5 3.63 V TA = -55C to +85C A TA = 25C, Vdd: 1.8 V. No load Idd 0.9 TA = -10C to +70C, Vdd max: 3.63 V. No load 1.3 TA = -55C to +85C, Vdd max: 3.63 V. No load 1.4 Output Stage Operating Current[3] Idd_out Power-Supply Ramp t_Vdd Ramp t_start Start-up Time[4] 0.065 0.125 A/Vpp 100 ms Over temperature, 0 to 90% 300 + 1 period 500 + 1 period ms TA = 25C 10C, valid output TA = -40C to +85C, Vdd: 1.5 V - 3.63 V. No load TA = -55C to +85C, valid output Operating Temperature Range -10 70 C Industrial Temperature -40 85 C Extended Cold Industrial Temperature -55 85 C Commercial Temperature T_use Notes: 1. Measured peak-to-peak. Tested with Agilent 53132A frequency counter. Due to the low operating frequency, the gate time must be 100 ms to ensure an accurate frequency measurement. 2. Measured peak-to-peak. Inclusive of Initial Tolerance at 25C, and variations over operating temperature, rated power supply voltage and load. Stability is specified for two operating voltage ranges. Stability progressively degrades with supply voltage below 1.5 V. 3. Core operating current does not include output driver operating current or load current. To derive total operating current (no load), add core operating current + (0.065 A/V) * (output voltage swing). 4. Measured from the time Vdd reaches 1.5 V. Rev 1.41 November 23, 2020 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Table 1. Electrical Characteristics (continued) Parameter Symbol Min. Typ. Max. Unit Condition LVCMOS Output Option, TA = -55C to +85C, typical value is TA = 25C Output Rise/Fall Time tr, tf Output Clock Duty Cycle DC 48 100 Output Voltage High VOH 90% Output Voltage Low VOL 200 ns 52 % 10% 10-90% (Vdd), 15 pF load, Vdd = 1.5 V to 3.63 V V Vdd: 1.5 V - 3.63 V. IOH = -10 A, 15 pF V Vdd: 1.5 V - 3.63 V. IOL = 10 A, 15 pF NanoDriveTM Programmable, Reduced Swing Output Output Rise/Fall Time tf, tf Output Clock Duty Cycle DC 48 200 ns 52 % 30-70% (VOL/VOH), 10 pF Load AC-coupled Programmable Output Swing V_sw 0.20 to 0.80 V SiT1534 does not internally AC-couple. This output description is intended for a receiver that is AC-coupled. See Table 6 for acceptable NanoDrive swing options Vdd: 1.5 V - 3.63 V, 10 pF Load, IOH / IOL = 0.2 A. DC-Biased Programmable Output Voltage High Range VOH 0.60 to 1.225 V Vdd: 1.5 V - 3.63 V. IOH = -0.2 A, 10 pF Load. See Table 5 for acceptable VOH/VOL setting levels DC-Biased Programmable Output Voltage Low Range VOL 0.35 to 0.80 V Vdd: 1.5 V - 3.63 V. IOL = 0.2 A, 10 pF Load. See Table 5 for acceptable VOH/VOL setting levels V TA = -40C to +85C, Vdd = 1.5 V to 3.63 V Programmable Output Voltage Swing Tolerance -0.055 0.055 Jitter Performance Period Jitter T_djitt 35 nsRMS Cycles = 10,000, TA = 25C, Vdd = 1.5 V - 3.63 V Table 2. Pin Configuration (SMD) Pin 1 2 3 Symbol NC GND CLK Out I/O Functionality No Connect, don't care No Connect. Will not respond to any input signal. When the SiT1534 is used as an alternative to an XTAL, this pin is typically connected to the receiving ICs X Out pin. In this case, the SiT1534 will not be affected by the signal on this pin. Power Supply Ground OUT Vdd Power Supply Vdd 4 NC Connect to ground. 1 3 CLK Out 2 Oscillator clock output. When the SiT1534 is used as an alternative to an XTAL, the CLK Out is typically connected to the receiving ICs X IN pin. No need for load capacitors. The output driver is independent of capacitive loading. Connect to power supply 1.2 V Vdd 3.63 V. Under normal operating conditions, Vdd does not require external bypass/decoupling capacitor(s). 4 SMD Package (Top View) GND Figure 1. Pin Assignments (SMD) For more information about the internal power-supply filtering, see the Power Supply Noise Immunity section in the detailed description. Contact SiTime for applications that require a wider operating supply voltage range. Table 3. Pin Configuration (CSP) Pin 1, 4 2 3 Symbol I/O GND Power Supply Ground CLK Out Vdd OUT Power Supply Functionality Connect to ground. Acceptable to connect pin 1 and 4 together. Both pins must be connected to GND. Oscillator clock output. The CLK can drive into a Ref CLK input or into an ASIC or chip-set's 32kHz XTAL input. When driving into an ASIC or chip-set oscillator input (X IN and X Out), the CLK Out is typically connected directly to the XTAL IN pin. No need for load capacitors. The output driver is intended to be insensitive to capacitive loading. Connect to power supply 1.2 V Vdd 3.63 V. Under normal operating conditions, Vdd does not require external bypass/decoupling capacitor(s). For more information about the internal power-supply filtering, see the Power Supply Noise Immunity section in the detailed description. CSP Package (Top View) GND 1 4 CLK Out 2 3 GND Vdd Figure 2. Pin Assignments (CSP) Contact SiTime for applications that require a wider operating supply voltage range. Rev 1.41 Page 2 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator System Block Diagram MEMS Resonator NC or GND Control Regulators Frequency Adjust GND Sustaining Amp Ultra-Low Power PLL Prog Divider Vdd Prog Ultra-Low Power Driver CLK Out Figure 3. SiT1534 Block Diagram Table 4. Absolute Maximum Limits Attempted operation outside the absolute maximum ratings 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) Value Unit -0.5 to 3.63 V Short Duration Maximum Power Supply Voltage (Vdd) 30 minutes 4.0 V Continuous Maximum Operating Temperature Range Vdd = 1.5 V - 3.63 V 105 C Vdd = 1.5 V - 3.63 V, 30 mins 125 C TA = -55C, Continuous Vdd = 1.8 V - 3.3 V 10% 8 Hours Human Body Model (HBM) ESD Protection JESD22-A114 3000 V Charge-Device Model (CDM) ESD Protection JESD22-C101 750 V Machine Model (MM) ESD Protection JESD22-A115 300 V g Short Duration Maximum Operating Temperature Range Maximum Continuous Operating Life at Temperature Extreme (meeting datasheet limits) Latch-up Tolerance JESD78 Compliant Mechanical Shock Resistance Mil 883, Method 2002 10,000 Mechanical Vibration Resistance Mil 883, Method 2007 70 g 2012 SMD Junction Temperature 150 C 1508 CSP Junction Temperature 150 C -65C to 150C Storage Temperature Rev 1.41 Page 3 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Description Frequency Stability The SiT1534 is the first programmable oscillator capable of a frequency range between 32.768 kHz down to 1 Hz for true pulse-per-second (PPS) operation. SiTime's silicon MEMS technology enables the smallest footprint and chip-scale packaging. In the chip-scale package (CSP), these devices reduce footprint by as much as 80% compared to existing 2.0 x 1.2 mm SMD XTAL packages. Unlike XTALs, the SiT1534 oscillator output enables greater component placement flexibility and eliminates external load capacitors, thus saving additional component count and board space. And unlike standard oscillators, the SiT1534 features NanoDriveTM, a factory programmable output that reduces the voltage swing to minimize power. The SiT1534 is factory calibrated (trimmed) to guarantee frequency stability to be less than 20 ppm at room temperature and less than 100 ppm over the full -40C to +85C temperature range. Unlike quartz crystals that have a classic tuning fork parabola temperature curve with a 25C turnover point, the SiT1534 temperature coefficient is extremely flat across temperature. This device maintains less than 100 ppm frequency stability over the full operating temperature range when the operating voltage is between 1.5 and 3.63 V as shown in Figure 5. SiTime's MEMS oscillators consist of MEMS resonators and a programmable analog circuit. Our MEMS resonators are built with SiTime's unique MEMS First(R) process. A key manufacturing step is EpiSeal(R) during which the MEMS resonator is annealed with temperatures over 1000C. EpiSeal creates an extremely strong, clean, vacuum chamber that encapsulates the MEMS resonator and ensures the best performance and reliability. During EpiSeal, a poly silicon cap is grown on top of the resonator cavity, which eliminates the need for additional cap wafers or other exotic packaging. As a result, SiTime's MEMS resonator die can be used like any other semiconductor die. One unique result of SiTime's MEMS First and EpiSeal manufacturing processes is the capability to integrate SiTime's MEMS die with a SOC, ASIC, microprocessor or analog die within a package to eliminate external timing components and provide a highly integrated, smaller, cheaper solution to the customer. Functionality is guaranteed over the full supply voltage range. However, frequency stability degrades below 1.5 V and steadily degrades as it approaches 1.2 V due to the internal regulator limitations. When measuring the SiT1534 output frequency with a frequency counter, it is important to make sure the counter's gate time is >100 ms. The slow frequency of a 32 kHz clock will give false readings with faster gate times. For applications that require a higher operating voltage range, consider the SiT1544 with a 2.7 V to 4.5 V supply voltage range. For applications that require XTAL resonator compatibility, the SiT1534 is available in the 2.0 x 1.2 mm (2012) package. Unlike XTAL resonators, SiTime's silicon MEMS oscillators require a power supply (Vdd) and ground (GND) pin. Vdd and GND pins are conveniently placed between the two large XTAL pins. When using the SiTime Solder Pad Layout (SPL), the SiT1534 footprint is compatible with existing 32 kHz XTALs in the 2012 SMD package. Figure 4 shows the comparison between the quartz XTAL footprint and the SiTime footprint. Quartz SiTime X OUT Connect to X OUT or NC SiT153x Industrial Temp Specification SiT1534 20 ppm Max @ 25C Quartz XTAL -160 to -220 ppm Over Temp Temperature (C) Figure 5. SiTime vs. Quartz GND X IN Clock Out Connect to X IN Top View Top View Figure 4. SiT1534 Footprint Compatibility with Quartz XTAL Footprint[5] Note: 5. On the SiTime device, X IN is not internally connected and will not respond to any signal. It is acceptable to connect to chipset X OUT. Rev 1.41 Page 4 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Power Supply Noise Immunity SiT1534 NanoDriveTM In addition to eliminating external output load capacitors common with standard XTALs, this device includes special power supply filtering and thus, eliminates the need for an external Vdd bypass-decoupling capacitor. This feature further simplifies the design and keeps the footprint as small as possible. Internal power supply filtering is designed to reject AC-noise greater than 150 mVpp and beyond 10 MHz frequency components. Figure 6 shows a typical output waveform of the SiT1534 (into a 10 pF load) when factory programmed for a 0.70 V swing and DC bias (VOH/VOL) for 1.8 V logic: Example: NanoDriveTM part number coding: D14. Example part number: SiT1534AI-J4-D14-32.768 VOH = 1.1 V, VOL = 0.4 V (VSW = 0.70 V) Programmable Frequency The SiT1534 is the first oscillator to feature a programmable frequency range between 1 Hz and 32.768 kHz in powers of two. Reducing the frequency significantly reduces the output load current (C*V*F). For example, reducing the frequency from 32.768 kHz to 10 kHz improves load current by 70%. Similarly, reducing the output frequency from 32.768 kHz down to 1 Hz reduces the load current by more than 99%. VOH = 1.1 V VSW = 0.7 V The Part Number Ordering shows the specific frequency options. VOL = 0.4 V NanoDriveTM Reduced Swing Output Voltage For low-power applications that drive directly into a chipset's XTAL input, the reduced swing output is ideal. SiTime's unique NanoDriveTM, factory-programmable output stage is optimized for low voltage swing to minimize power and maintain compatibility with the downstream oscillator input (X IN pin). The SiT1534 output swing is factory programmed between 250 mV and 800 mV. For DC-coupled applications, output VOH and VOL are individually factory programmed. Contact SiTime for programming support. Figure 6. SiT1534AI-J4-D14-32.768 Output Waveform (10 pF load) Table 5 shows the supported NanoDriveTM VOH, VOL factory programming options. Table 5. Acceptable VOH/VOL NanoDriveTM Levels NanoDrive VOH (V) VOL (V) Swing (mV) Comments D26 1.2 0.6 600 55 1.8 V logic compatible D14 1.1 0.4 700 55 1.8 V logic compatible D74 0.7 0.4 300 55 XTAL compatible AA3 n/a n/a 300 55 XTAL compatible Power-up The SiT1534 starts-up to a valid output frequency within 300 ms when operating at 32.768 kHz. For frequencies less than 32.768 kHz, the start-up time can increase by an additional clock period. The maximum start-up time over temperature is 500 ms max over temperature plus a clock period. For example, the maximum start-up time for a 256 Hz clock is 500 ms + 3.9 ms. To ensure the device starts-up within the specified limit, make sure the powersupply ramps-up in approximately 10 - 20 ms (to within 90% of Vdd). Start-up time is measured from the time Vdd reaches 1.5 V. For applications that require start-up between 1.2 V and 1.5 V, the start-up time will be typically 50 ms longer. SiT1534 Full Swing LVCMOS Output The SiT1534 can be factory programmed to generate fullswing LVCMOS levels. Figure 5 shows the typical waveform (Vdd = 1.8 V) at room temperature into a 15 pF load. Figure 7. LVCMOS Waveform (Vdd = 1.8 V) into 15 pF Load Example: LVCMOS output part number coding is always DCC Example part number: SiT1534AI-J4-DCC-32.768 Rev 1.41 Page 5 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Calculating Total Supply Current with Load Calculating Load Current No Load Supply Current When calculating no-load power for the SiT1534, the core and output driver components need to be added. Since the output voltage swing can be programmed for reduced swing between 250 mV and 800 mV for ultra-low power applications, the output driver current is variable and is a function of the output voltage swing and the output frequency. Therefore, no-load operating supply current is broken into two sections; core and output driver. The real benefit of NanoDriveTM is shown in the Total Supply Current with Load calculation in the next section. The equation is as follows: To calculate the total supply current, including the load, follow the equation listed below. Note the 35% reduction in power with NanoDriveTM as shown in Example 2. Reducing the output clock frequency reduces the load current significantly, as shown in Example 3. Total Current = Idd Core + Idd Output Driver + Load Current Example 1: Full-swing LVCMOS Total Supply Current (no load) = Idd Core + Idd Output Driver Example 1: Full-swing LVCMOS Vdd = 1.8 V Fout = 32.768 kHz Vout = Vdd Idd Core = 900 nA Idd Output Driver: (3.5 pF)(Vout)(Fout) = 206 nA Load Current: (10 pF)(1.8 V)(32.768 kHz) = 590 nA Vdd = 1.8 V Fout = 32.768 kHz Vout = Vdd Idd Output Driver: (3.5 pF)(Vout)(Fout) = 206 nA Vdd = 1.8 V Idd Core = 900 nA (typ) Fout = 32.768 kHz Vout = Vdd = 1.8 V Idd Core = 900 nA Vout (programmable): Voh - Vol = 1.2 V - 0.6 V = 600 mV Idd Output Driver: (3.5 pF)(Vout)(Fout) = 69 nA Load Current: (5 pF)(0.6 V)(32.768 kHz) = 98 nA Total Current with Load = 900 nA + 205 nA + 590 nA =1.5 A Example 2: NanoDriveTM Reduced Swing Supply Current = 900 nA + 206 nA = 1.1 A Example 2: NanoDriveTM Reduced Swing Vdd = 1.8 V Fout = 32.768 kHz Vout (programmable) = Voh - Vol = 1.1 V - 0.6 V = 500 mV Idd Core = 900 nA (typ) Idd Output Driver: (3.5 pF)(Vout)(Fout) = 57 nA Total Current with Load = 900 nA + 69 nA + 98 nA = 1.07 A Example 3: LVCMOS and 1 Hz Output Frequency Same conditions as above example 1, but with output frequency = 1 Hz. This will significantly reduce the current consumption from the output stage and the load. Idd Core = 900 nA Idd Output Stage = (3.5 pF)(1.8 V)(1 Hz) = 6.3 pA 1 Hz Output Frequency impacts the load current as shown below: Supply Current = 900 nA + 57 nA = 957 nA Load Current = CVF = (10 pF)(1.8 V)(1 Hz) = 18 pA Total Supply Current with Load = Core Current + Output Stage Current + Load Current = 900 nA + 0.0063 nA + 0.018 nA = 900 nA Summary: Reducing the output frequency to 1 Hz virtually eliminates the current consumption from the output stage and load current. Rev 1.41 Page 6 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Typical Operating Curves (TA = 25C, Vdd = 1.8 V, unless otherwise stated) Frequency Stability over Temperature Initial Tolerance (ppm) TA = 25C Post Reflow, No underfill Temperature (C) Figure 9. Frequency Stability over Temperature Figure 8. Initial Tolerance Histogram Temperature (C) Figure 10. Core Current over Temperature Voltage (V) Figure 11. Output Stage Current over Temperature Time (sec) Figure 12. 32.768 kHz Start-up Time Rev 1.41 Page 7 of 13 www.sitime.com Frequency Error (ppm) SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Vdd 1.8 V Vdd 3.3 V Noise Injection Frequency (Hz) Figure 13. Power Supply Noise Rejection (150 mV Noise) VOH = 1.1 V VSW = 0.7 V VOL = 0.4 V Figure 14. NanoDriveTM Output Waveform (VOH = 1.1 V, VOL = 0.4 V; SiT1534AI-J4-D14-32.768) Rev 1.41 Figure 15. LVCMOS Output Waveform (Vswing = 1.8 V, SiT1534AI-J4-DCC-32.768) Page 8 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Dimensions and Patterns Package Size - Dimensions (Unit: mm)[6] Recommended Land Pattern (Unit: mm) SiTime Only SPL 2.0 x 1.2 mm SMD SiTime Alternate SPL with Larger Center Pads #4 #4 #2 0.3 (2x) 0.4 0.55 0.5(2x) #2 0.4 (2x) #1 #3 1.4 (2x) #3 #1 0.65 1.2 2.0 0.5(2x) XTAL Compatible SPL Note: 6. For marking guidance, see SiTime's Manufacturing Notes, located on the SiTime web site in the Quality & Reliability section. Rev 1.41 Page 9 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable 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 Rev 1.41 Page 10 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Manufacturing Guidelines 1) No Ultrasonic Cleaning: Do not subject the SiT1534 to an ultrasonic cleaning environment. Permanent damage or long term reliability issues to the MEMS structure may occur. 2) Applying board-level underfill (BLUF) to the device is acceptable. It is reasonable to expect a slight shift in the frequency and has been accounted for in the frequency tolerance specification. Tested with UF3810, UF3808, and FP4530 underfill. 3) CSP Reflow profile, per JESD22-A113D. 4) When designing-in the SiT1534 in the 2012 SMD package into noisy, high EM environments, we recommend the following design guidelines: 5) 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. Add a low ESR/ESL, 0.1 uF to 1.0 uF ceramic capacitor (X7R) to help filter high frequency noise on the Vdd power-supply line. Place it as close to the SiTime oscillator Vdd pin as possible. Place a solid GND plane underneath the SiTime oscillator to shield the oscillator from noisy traces on the other board layers. For details, please refer to the PCB Layout Guidelines in AN10006. For additional manufacturing guidelines and marking/ tape-reel instructions, refer to SiTime Manufacturing Notes. Rev 1.41 Page 11 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Ordering Information Part number characters in blue represent the customer specific options. The other characters in the part number are fixed. Tape and Reel ("J" Package Size Only) Silicon Revision Letter Part Family CSP SMD "S": 8 mm Tape & Reel, 10 ku reel "Q": 8 mm Tape & Reel, 5 ku reel "D": 8 mm Tape & Reel, 3 ku reel "E": 8 mm Tape & Reel, 1 ku reel SiT1534A I - J 4 - D14 - 08.192 Q SiT1534A I - H 4 - D14 - 08.192 S Temperature Range Tape and Reel "C": Commercial, -10 to 70C "I": Industrial, -40 to 85C "D": -55 to 85C "S": 8 mm Tape & Reel, 10 ku reel "D": 8 mm Tape & Reel, 3 ku reel "E": 8 mm Tape & Reel, 1 ku reel Package Size Output Clock Frequency (kHz) "J": 1.5 mm x 0.8 mm CSP "H": 2.0 mm x 1.2 mm SMD 32.768 16.384 08.192 04.096 02.048 01.024 Frequency Stability "5": 75 ppm (-10 to 70C only) "4": 100 ppm (-40 to 85C only) "6": 150 ppm (-55 to 85C only) 00.512 00.256 00.128 00.064 00.032 00.016 00.008 00.004 00.002 00.001 Output Voltage Setting DCC: LVCMOS Output NanoDriveTM Reduced Swing Output Refer to Table 6 for output setting options "A": AC-coupled signal path "D": DC-coupled signal path The following examples illustrate how to select the appropriate temp range and output voltage requirements: Example 1: SiT1534AI-J4-D14-08.192 Example 2: SiT1534AC-J5-AA5-00.001 1) Industrial temp & corresponding 100 ppm frequency stability 1) Commercial temp & corresponding 75 ppm frequency stability 2) Output swing requirements: 2) Output swing requirements: a) Output frequency = 8.192 kHz a) Output frequency = 1 Hz b) "D" = DC-coupled receiver b) "A" = AC-coupled receiver c) d) "1" = VOH = 1.1 V "4" = VOL = 0.4 V d) "5" = 500 mV swing c) "A" = AC-coupled receiver Table 6. Acceptable VOH/VOL NanoDriveTM Levels[7] NanoDrive VOH (V) VOL (V) Swing (mV) Comments D26 1.2 0.6 600 55 1.8 V logic compatible D14 1.1 0.4 700 55 1.8 V logic compatible D74 0.7 0.4 300 55 XTAL compatible AA3 n/a n/a 300 55 XTAL compatible Note: 7. If these available options do not accommodate your application, contact Factory for other NanoDrive options. Rev 1.41 Page 12 of 13 www.sitime.com SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator Table 7. Revision History Version Release Date 1.0 Sep 3, 2014 Change Summary Rev 0.9 Preliminary to Rev 1.0 Production Release Added start-up time at TA = 85C Added typical operating plots Labeled 25C frequency stability as Frequency Tolerance Added Manufacturing Guidelines section 1.1 Nov 25, 2014 Added 2012 SMD package design/mfg guidelines 1.2 Jan 5, 2016 Updated NanoDrive options 1.3 Apr 3, 2016 Added SiTime alternate landing pattern option Updated Note 6 1.31 Jan 18, 2018 Updated SPL, page layout changes 1.4 Jun 1, 2018 Added -55 to 85C temperature range option Updated POD (Package Outline Drawing) Updated logo and company address, other page layout changes 1.41 Nov 23, 2020 Formatting, rev table date format, TempFlat MEMS logo and trademarks update Added Q-suffix to the Ordering table as CSP option only SiTime Corporation, 5451 Patrick Henry Drive, Santa Clara, CA 95054, USA | Phone: +1-408-328-4400 | Fax: +1-408-328-4439 (c) SiTime Corporation 2014-2020. 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 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. 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 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 1.41 Page 13 of 13 www.sitime.com