SIT2024BE-S2-33E-36.670000

SiT2024B Automotive AEC-Q100 SOT23 Oscillator Features ◼ ◼ ◼ ◼ ◼ ◼ ◼ ◼ ◼ Applications AEC-Q100 with extended temperature range (-55°C to 125°C) Frequencies between 1 MHz and 110 MHz accurate to 6 decimal places Supply voltage of 1.8 V or 2.25 V to 3.63 V 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 5-pin SOT23-5 package: 2.9 x 2.8 mm x mm RoHS and REACH compliant, Pb-free, Halogen-free and Antimony-free Automotive, extreme temperature and other high-rel electronics Infotainment systems, collision detection devices, and in-vehicle networking Powertrain control ◼ ◼ ◼ Related products for automotive applications. For aerospace and defense applications SiTime recommends using only Endura™ SiT2044. Electrical Characteristics 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 25°C and nominal supply voltage. Parameters Symbol Min. Typ. Max. Unit Condition Frequency Range Output Frequency Range f 1 – 110 MHz Refer to Tables 14 to 16 for a list of supported frequencies Frequency Stability and Aging Frequency Stability F_stab -20 – +20 ppm -25 – +25 ppm -30 – +30 ppm -50 – +50 ppm Inclusive of Initial tolerance at 25°C, 1st year aging at 25°C, and variations over operating temperature, rated power supply voltage and load (15 pF ± 10%). Operating Temperature Range Operating Temperature Range (ambient) T_use -40 – +85 °C AEC-Q100 Grade 3 -40 – +105 °C AEC-Q100 Grade 2 -40 – +125 °C AEC-Q100 Grade 1 -55 – +125 °C Extended cold, AEC-Q100 Grade1 Supply Voltage and Current Consumption Supply Voltage Current Consumption Vdd Idd All voltages between 2.25 V and 3.63 V including 2.5 V, 2.8 V, 3.0 V and 3.3 V are supported. 1.62 1.8 1.98 V 2.25 – 3.63 V – 4.0 4.8 mA No load condition, f = 20 MHz, Vdd = 2.25 V to 3.63 V – 3.8 4.5 mA No load condition, f = 20 MHz, Vdd = 1.8 V LVCMOS Output Characteristics Duty Cycle Rise/Fall Time DC 45 – 55 % Tr, Tf – 1.5 3 ns Vdd = 2.25V - 3.63V, 20% - 80% – 1.3 2.5 ns Vdd = 1.8V, 20% - 80% All Vdds Output High Voltage VOH 90% – – Vdd IOH = -4 mA (Vdd = 3.0 V or 3.3V) IOH = -3 mA (Vdd = 2.8 V and Vdd = 2.5 V) IOH = -2 mA (Vdd = 1.8 V) Output Low Voltage VOL – – 10% Vdd IOL = 4 mA (Vdd = 3.0 V or 3.3 V) IOL = 3 mA (Vdd = 2.8 V and Vdd = 2.5 V) IOL = 2 mA (Vdd = 1.8 V) Input High Voltage VIH 70% – – Vdd Pin 1, OE Input Low Voltage VIL – – 30% Vdd Pin 1, OE Input Pull-up Impedance Z_in – 100 – k Pin 1, OE logic high or logic low Input Characteristics Rev 1.81 1 January 2023 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator Table 1. Electrical Characteristics (continued) Parameters Symbol Min. Typ. Max. Unit Condition Startup and Resume Timing T_start – – 5.5 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 Standby Current I_std – 2.6 – A Vdd = 2.8 V to 3.3 V, ST = Low, Output is weakly pulled down – 1.4 – A Vdd = 2.5 V, ST = Low, Output is weakly pulled down – 0.6 – A Vdd = 1.8 V, ST = Low, Output is weakly pulled down Startup Time Jitter RMS Period Jitter T_jitt RMS Phase Jitter (random) T_phj – 1.6 2.5 ps f = 75 MHz, 2.25 V to 3.63 V – 1.9 3.0 ps f = 75 MHz, 1.8 V – 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 Table 2. Pin Description Symbol 1 GND 2 NC Top View Functionality Power No Connect Output Enable 3 OE/NC No Connect Electrical ground GND 1 NC 2 OE/NC 3 No connect H[1]: specified frequency output L: output is high impedance. Only output driver is disabled. Any voltage between 0 and Vdd or Open[1]: Specified frequency output. Pin 3 has no function. 4 VDD Power Power supply voltage 5 OUT Output Oscillator output YXXXX Pin 5 OUT 4 VDD [2] Figure 1. Pin Assignments Notes: 1. In OE or ST mode, a pull-up resistor of 10 kΩ or less is recommended if pin 3 is not externally driven. If pin 3 needs to be left floating, use the NC option. 2. A capacitor of value 0.1 µF or higher between Vdd and GND is required. Rev 1.81 Page 2 of 16 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator 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. Min. Max. Unit Storage Temperature Parameter -65 150 °C Vdd V -0.5 4 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 SOT23-5 JA, 4 Layer Board JC, Bottom (°C/W) (°C/W) 421 175 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 85°C 95°C 105°C 115°C 125°C 135°C 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 @ 260°C Rev 1.81 Page 3 of 16 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator Test Circuit and Waveform Vout Test Point Vdd tr 15 pF (including probe and fixture capacitance) 80% Vdd 4 5 1 2 tf 0.1µF 3 50% Power Supply 20% Vdd High Pulse (TH) Period Vdd 1k Figure 2. Test Circuit Low Pulse (TL) OE/ST Function Figure 3. Waveform[6] [6] Note: 6. Duty Cycle is computed as Duty Cycle = TH/Period. Timing Diagrams 90% Vdd Vdd Vdd 50% Vdd T_oe T_start Pin 4 Voltage OE Voltage No Glitch during start up CLK Output CLK Output HZ HZ T_start: Time to start from power-off T_oe: Time to re-enable the clock output Figure 4. Startup Timing (OE Mode)[7] Figure 5. OE Enable Timing (OE Mode Only) Vdd OE Voltage 50% Vdd T_oe CLK Output HZ T_oe: Time to put the output in High Z mode Figure 6. OE Disable Timing (OE Mode Only) Note: 7. SiT2024 has “no runt” pulses and “no glitch” output during startup or resume. Rev 1.81 Page 4 of 16 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator Performance Plots[8] 1.8 V 2.5 V 2.8 V 3V 3.3 V 6.0 DUT1 DUT2 DUT3 DUT4 DUT5 DUT6 DUT7 DUT8 DUT9 DUT10 DUT11 DUT12 DUT13 DUT14 DUT15 DUT16 DUT17 DUT18 DUT19 DUT20 25 5.5 20 Frequency (ppm) Idd (mA) 5.0 4.5 4.0 3.5 15 10 5 0 -5 -10 -15 -20 3.0 0 20 40 60 80 100 -25 -55 Frequency (MHz) 2.8 V 5 25 45 65 85 105 125 3.0 V Figure 8. Frequency vs Temperature 3.3 V 1.8 V 4.0 55 3.5 54 2.5 V 2.8 V 3.0 V 3.3 V 53 3.0 Duty cycle (%) RMS period jitter (ps) 2.5 V -15 Temperature (°C) Figure 7. Idd vs Frequency 1.8 V -35 2.5 2.0 1.5 1.0 52 51 50 49 48 47 0.5 46 0.0 0 20 40 60 80 45 100 0 20 40 Figure 9. RMS Period Jitter vs Frequency 2.5 V 2.8 V 3.0 V 1.8 V 3.3 V 2.5 2.5 2.0 2.0 1.5 1.0 100 2.5 V 2.8 V 3.0 V 3.3 V 1.5 1.0 0.5 0.5 0.0 0.0 -40 -20 0 20 40 60 80 100 -40 120 Figure 11. 20%-80% Rise Time vs Temperature -20 0 20 40 60 80 100 120 Temperature (°C) Temperature (°C) Rev 1.81 80 Figure 10. Duty Cycle vs Frequency Fall time (ns) Rise time (ns) 1.8 V 60 Frequency (MHz) Frequency (MHz) Figure 12. 20%-80% Fall Time vs Temperature Page 5 of 16 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator Performance Plots[8] 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V 1.0 2.0 1.9 0.9 1.8 0.8 1.6 IPJ (ps) IPJ (ps) 1.7 1.5 1.4 1.3 0.7 0.6 0.5 1.2 0.4 1.1 1.0 0.3 10 20 30 40 50 60 70 80 90 100 110 10 Frequency (MHz) Figure 13. RMS Integrated Phase Jitter Random (12 kHz to 20 MHz) vs Frequency[9] 20 30 40 50 60 70 80 90 100 110 Frequency (MHz) Figure 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 below 40 MHz. Rev 1.81 Page 6 of 16 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator Programmable Drive Strength The SiT2024 includes a programmable drive strength feature 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 interference (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 maintaining 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. The SiT2024 can support up to 60 pF in maximum capacitive loads with drive strength settings. Refer to the Rise/Tall Time Tables (Table 7 to 11) to determine the proper drive strength for the desired combination of output load vs. rise/fall time. SiT2024 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 SiT2024 nominal supply voltage (1.8 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V). 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. 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 square wave. For the ratio of 0.45, the rise/fall times are very close to neartriangular 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 period. trise=0.05 trise=0.1 trise=0.15 trise=0.2 trise=0.25 trise=0.3 trise=0.35 trise=0.4 trise=0.45 10 Harmonic amplitude (dB) 0 -10 -20 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 guaranteed full swing of the output voltage over temperature can be calculated as: Max Frequency = 1 5 x Trf_20/80 -30 -40 where Trf_20/80 is the typical value for 20%-80% rise/fall time. -50 -60 Example 1 -70 -80 1 3 5 7 9 11 Calculate fMAX for the following condition: Harmonic number Figure 15. Harmonic EMI reduction as a Function of Slower Rise/Fall Time Jitter Reduction with Faster Rise/Fall Time Power supply noise can be a source of jitter for the downstream 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 determine 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 increases. As an example, for a 3.3 V SiT2024 device with default drive strength setting, the typical rise/fall time is 1 ns 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 SiT2024. Rev 1.81 ◼ Vdd = 3.3 V (Table 11) ◼ Capacitive Load: 30 pF ◼ Desired Tr/f time = 1.31 ns (rise/fall time part number code = F) Part number for the above example: SiT2024BAES2-18E-66.666660 Drive strength code is inserted here. Default setting is “-” Page 7 of 16 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator Rise/Fall Time (20% to 80%) vs CLOAD Tables Table 7. Vdd = 1.8V Rise/Fall Times for Specific CLOAD Table 8. Vdd = 2.5V Rise/Fall Times for Specific CLOAD Rise/Fall Time Typ (ns) Drive Strength \ CLOAD L A R B T E U F or "‐": default 5 pF 6.16 3.19 2.11 1.65 0.93 0.78 0.70 0.65 15 pF 11.61 6.35 4.31 3.23 1.91 1.66 1.48 1.30 30 pF 22.00 11.00 7.65 5.79 3.32 2.94 2.64 2.40 Rise/Fall Time Typ (ns) 45 pF 31.27 16.01 10.77 8.18 4.66 4.09 3.68 3.35 60 pF 39.91 21.52 14.47 11.08 6.48 5.74 5.09 4.56 Table 9. Vdd = 2.8V Rise/Fall Times for Specific CLOAD Drive Strength \ CLOAD L A R B T E or "‐": default U F 5 pF 4.13 2.11 1.45 1.09 0.62 15 pF 8.25 4.27 2.81 2.20 1.28 30 pF 12.82 7.64 5.16 3.88 2.27 45 pF 21.45 11.20 7.65 5.86 3.51 60 pF 27.79 14.49 9.88 7.57 4.45 0.54 0.43 0.34 1.00 0.96 0.88 2.01 1.81 1.64 3.10 2.79 2.54 4.01 3.65 3.32 Table 10. Vdd = 3.0V Rise/Fall Times for Specific CLOAD Rise/Fall Time Typ (ns) Rise/Fall Time Typ (ns) Drive Strength \ CLOAD L A R B T 5 pF 3.77 1.94 1.29 0.97 0.55 15 pF 7.54 3.90 2.57 2.00 1.12 30 pF 12.28 7.03 4.72 3.54 2.08 45 pF 19.57 10.24 7.01 5.43 3.22 60 pF 25.27 13.34 9.06 6.93 4.08 E or "‐": default U F 0.44 0.34 0.29 1.00 0.88 0.81 1.83 1.64 1.48 2.82 2.52 2.29 3.67 3.30 2.99 Drive Strength \ CLOAD L A R B T or "‐": default E U F 5 pF 3.60 1.84 1.22 0.89 0.51 0.38 0.30 0.27 15 pF 7.21 3.71 2.46 1.92 1.00 0.92 0.83 0.76 30 pF 11.97 6.72 4.54 3.39 1.97 1.72 1.55 1.39 45 pF 18.74 9.86 6.76 5.20 3.07 2.71 2.40 2.16 60 pF 24.30 12.68 8.62 6.64 3.90 3.51 3.13 2.85 Table 11. Vdd = 3.3V Rise/Fall Times for Specific CLOAD Rise/Fall Time Typ (ns) Drive Strength \ CLOAD L A R B 5 pF 3.39 1.74 1.16 0.81 15 pF 6.88 3.50 2.33 1.82 30 pF 11.63 6.38 4.29 3.22 45 pF 17.56 8.98 6.04 4.52 60 pF 23.59 12.19 8.34 6.33 T or "‐": default E U F 0.46 0.33 0.28 0.25 1.00 0.87 0.79 0.72 1.86 1.64 1.46 1.31 2.60 2.30 2.05 1.83 3.84 3.35 2.93 2.61 Rev 1.81 Page 8 of 16 www.sitime.com SiT2024B Automotive AEC-Q100 SOT23 Oscillator In addition, the SiT2024 supports “no runt” pulses and “no glitch” output during startup or when the output driver is re-enabled from the OE disable mode as shown in the waveform captures in Figure 16 and Figure 17. Pin 3 Configuration Options (OE or NC) Pin 3 of the SiT2024 can be factory-programmed to support three modes: Output Enable (OE) or No Connect (NC). Output Enable (OE) Mode In the OE mode, applying logic low to the OE pin only disables the output driver and puts it in Hi-Z mode. The core of the device continues to operate normally. Power consumption is reduced due to the inactivity of the output. When the OE pin is pulled High, the output is typically enabled in