Click here for production status of specific part numbers. MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM General Description The MAX31091 is a low-cost clock generator that is factory trimmed to output frequencies from 200kHz to 66.6MHz with a nominal accuracy of 0.25%. The device can also produce a center-spread-spectrum output with pin-selectable dither magnitude and rate. Assembled in an 8-pin MAX(R) package, the MAX31091 is designed to operate with a 3.0V to 3.6V power supply over the automotive temperature range (-40C to +125C). Applications GND SEL1 Factory Trimmed Center-Dithered Spread-Spectrum Output Pin-Selectable Center-Dither Magnitude of 0%, 1%, 2%, or 4% Lead(Pb)-Free, 8-Pin MAX Package AEC-Q100 Qualified Contact factory for available custom frequency options. VCC VCC 1.75% Accuracy Across Temperature Custom Frequency Options fOUT DECOUPLING CAPACITORS -40C to +125C Operating Temperature Range 3.0V to 3.6V Supply Operation Typical Operating Circuit OUT Spread-Spectrum Clock Output from 200kHz to 66.6MHz Pin-Selectable Dither Rate Automotive Infotainment Navigation Advanced Driver Assistance System (ADAS) Engine Control Unit (ECU) Instrumentation Automotive VCC Benefits and Features 1 8 2 7 MAX31091 3 6 4 5 Ordering Information appears at end of data sheet. DR N.C. N.C. VCC SEL0 EconOscillator is a trademark and MAX is a registered trademark of Maxim Integrated Products, Inc. 19-7303; Rev 2; 11/18 MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM Absolute Maximum Ratings Voltage Range on VCC Relative to Ground..........-0.5V to +4.0V Voltage Range on DR, SEL0, SEL1 Relative to Ground...............................-0.5V to (VCC + 0.5V)* Continuous Power Dissipation (TA = +70C) MAX (derate 4.8mW/C above +70C)......................390mW Operating Temperature Range.......................... -40C to +125C Storage Temperature Range............................. -55C to +125C Lead Temperature (soldering, 10s).................................. +300C Soldering Temperature (reflow)........................................+260C *This voltage must not exceed 4.0V. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information 8 MAX PACKAGE CODE U8+4 Outline Number 21-0036 Land Pattern Number 90-0092 Thermal Resistance, Multi-Layer Board: Junction to Ambient (JA) 206C/W Junction to Case (JC) 42C/W For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. www.maximintegrated.com Maxim Integrated 2 MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM Recommended Operating Conditions (TA = -40C to +125C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS (Note 1) MIN TYP MAX UNITS 3.0 3.3 3.6 V Supply Voltage VCC High-Level Input Voltage (SEL0, SEL1, DR) VIH 0.7 x VCC VCC + 0.3 V Low-Level Input Voltage (SEL0, SEL1, DR) VIL -0.3 0.3 x VCC V MAX UNITS DC Electrical Characteristics (VCC = +3.0V to +3.6V, TA = -40C to +125C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP High-Level Output Voltage (OUT) VOH IOH = -4mA, VCC = 3.0V Low-Level Output Voltage (OUT) VOL IOL = 4mA 0.4 V High-Level Input Current (SEL0, SEL1, DR) IIH VCC = 3.6V 1 A Low-Level Input Current (SEL0, SEL1, DR) IIL VIL = 0V Supply Current (Active) ICC (Note 2) 2.4 V -1 A 16 mA MAX UNITS 66.6 MHz AC Electrical Characteristics (VCC = +3.0V to +3.6V, TA = -40C to +125C, unless otherwise noted.) PARAMETER SYMBOL Output Frequency Range fOUT Output Center Frequency Tolerance fOUT Power-Up Time tPU Load Capacitance CL Duty Cycle CONDITIONS MIN TYP (Note 3) 0.200 VCC = 3.3V, TA = +25C -0.25 Across TA and VCC = 3.3V -1.75 +1.75 0C to +70C and VCC = 3.3V -1.2 +1.2 0 (Note 4) 15 < 33.3MHz (Note 3) 33.3MHz (Note 3) +0.25 0.1 ms 50 pF 50 40 % 60 % Jitter (RMS), 50MHz 0.3 % Note 1: All voltages are referenced to ground. Currents entering the IC are specified positive and currents exiting the IC are negative. Note 2: Supply current measured with CL = 15pF, VCC = 3.6V, TA = +25C, fOUT = 66.6MHz, no dither. Note 3: No dither. Note 4: Guaranteed by design. Note 5: For aging characteristics, contact factory. www.maximintegrated.com Maxim Integrated 3 MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM Typical Operating Characteristics (continued) (VCC = 3.3V, TA = +25C, unless otherwise noted.) toc01 VCC = 3.6V 8.5 VCC = 3.3V 8 7.5 VCC = 3.0V 7 VCC = 3.3V NO DITHER 0.75 0.25 fOUT = 66MHz -0.25 -0.75 fOUT= 200kHz -1.25 fOUT = 66MHz 6.5 -40 10 60 TEMPERATURE (C) -40 10 49.5 49 48.5 fOUT = 66MHz 47.5 NO DITHER 46.5 3.4 VCC (V) 48 fOUT = 66MHz 47 3.6 3.4 3.6 toc06 2.5 49 RISE TIME = 1.02nS TYPICAL AT 12pF LOAD 2 1.5 1 NO DITHER 0.5 0 -40 10 VCC (V) 60 110 TIME (ns) TEMPERATURE (C) SPECTRUM ATTENUATION vs. FREQUENCY AT DIFFERNET DITHER AMPLITUDES OUTPUT FALL TIME toc07 3.5 toc08 5 2 1.5 1 1% -5 ATTENUATION (dB) RISE TIME = 1.12nS TYPICAL AT 12pF LOAD 2.5 -10 fOUT = 33.3MHz 0% 0 3 OUTPUT (V) 3.2 3 44 3.2 NO DITHER 3.5 fOUT = 200kHz 45 46 3 -0.3 OUTPUT RISE TIME 46 47 fOUT = 200kHz -0.2 3 50 48 -0.1 110 toc05 51 DUTY CYCLE (%) DUTY CYCLE (%) 60 52 fOUT = 200kHz 50 fOUT = 66MHz 0 DUTY CYCLE vs. TEMPERATURE toc04 51 0.1 TEMPERATURE (C) DUTY CYCLE vs. SUPPLY VOLTAGE 50.5 0.2 -0.5 -1.75 110 0.3 -0.4 OUTPUT (V) ICC (mA) 9 toc03 0.5 0.4 1.25 FREQUENCY VARIATION (%) 9.5 toc02 1.75 FREQUENCY VARIATION (%) 10 FREQUENCY VARIATION vs. VOLTAGE FREQUENCY VARIATION vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE 4% 8dB 2% 11dB 14dB -15 -20 -25 0.5 RBW = 120kHz CENTER DITHER -30 0 -35 TIME (ns) 31.9 32.9 33.9 FREQUENCY (MHz) www.maximintegrated.com Maxim Integrated 4 MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM Pin Configuration Pin Description PIN NAME 1 OUT Spread-Spectrum Clock Output 2 VCC Supply Voltage DR 3 GND Ground 7 N.C. 6 N.C. 4 SEL1 5 SEL0 5 SEL0 Spread-Spectrum Dither Magnitude Select Inputs. Selects dither magnitude (see Table 1). 6, 7 N.C. No Connection 8 DR Spread-Spectrum Dither Rate Selector. Selects dither rate (see Table 2). TOP VIEW OUT 1 VCC 2 GND 3 SEL1 4 + 8 MAX31091 MAX FUNCTION VCC VCC fMOSC GND fMOSC FACTORY-PROGRAMMED MASTER OSCILLATOR DITHER RATE DIVIDER DR fDITHER TRIANGLE-WAVE GENERATOR (DITHER %) SEL1 FACTORY-PROGRAMMED PRESCALER Block Diagram MAX31091 fOUT OUT SEL0 fMOSC IS THE MASTER OSCILLATOR FREQUENCY. www.maximintegrated.com Maxim Integrated 5 MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM Detailed Description Power-Up The MAX31091 clock generator is capable of output frequencies from 200kHz to 66.6MHz over the full automotive temperature range (-40C to +125C). The device can also produce a spread-spectrum (dithered) square-wave output using four pin-selectable dither percentages. The device also features two selectable dither rates. The MAX31091 is shipped from the factory-programmed to a customer-specified frequency. Spread Spectrum Upon the application of power, the MAX31091 output is held in the low state until tPU has elapsed. This removes any possibility of erroneous output transitions during initial power-up. Table 1. Dither Magnitude DITHER MAGNITUDE (%) SEL1 SEL0 LOGIC LEVEL LOGIC LEVEL MAX31091AUA The MAX31091 can reduce radiated emission peaks. The dither percentage is controlled by the state of the SEL0 and SEL1 pins. The output frequency can be dithered at 0%, 1%, 2%, and 4%, centered around the programmed frequency. The two select pins SEL0 and SEL1 provide a means of selecting the dither magnitudes as follows: A triangle-wave generator injects a control signal into the master oscillator to dither its output. The dither rate is a function of the output frequency, fOUT, as well as the setting of the DR pin (see the equation below). Figure 1 shows a plot of the output frequency vs. time. DITHER RATE = 0 0 No dither 0 1 Q1 1 0 Q2 1 1 Q4 Table 2. Value of n w.r.t. Output Frequency OUTPUT FREQUENCY fOUT (MHz) n fOUT (min) fOUT (max) DR = LOGIC LEVEL 1 DR = LOGIC LEVEL 0 0.200 0.260 4 5 0.261 0.521 5 6 0.522 1.042 6 7 1.043 2.083 7 8 2.084 4.167 8 9 4.168 8.333 9 10 f OUT 2n where n is defined in Table 2 as a function of output frequency. For example, for an output frequency of 27.0MHz, the dither rate would be 13.2kHz for DR = 1 and 6.6kHz for DR = 0. 8.334 16.667 10 11 16.668 33.333 11 12 33.334 66.667 12 13 MAX31091 Frequency Spreading Profile as a Function of Dither % Figure 1A IF DITHER AMOUNT = 0% fOUT PROGRAMMED fOUT+ (1%, 2%, OR 4% OF fOUT) PROGRAMMED fOUT PROGRAMMED fOUT(1%, 2%, OR 4% OF fOUT) DITHER AMOUNT (1%, 2%, OR 4%) 1 DITHER FREQ TIME Figure 1. Center Dithered www.maximintegrated.com Maxim Integrated 6 MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM Applications Information Chip Information SUBSTRATE CONNECTED TO GROUND Power-Supply Decoupling To achieve best results, it is highly recommended that decoupling capacitors are used on the IC power-supply pins. Typical values of decoupling capacitors are 0.01F and 0.1F. Use a high-quality, ceramic, surface-mount capacitor, and mount it as close as possible to the VCC and GND pins of the IC to minimize lead inductance. Ordering Information PART TEMP RANGE SPREAD SPECTRUM OUTPUT FREQUENCY (MHz) PIN-PACKAGE MAX31091AUA/V+033 -40C to +125C Center 33.3 8 MAX MAX31091AUA/V+T033 -40C to +125C Center 33.3 8 MAX MAX31091AUA/V+066 -40C to +125C Center 66.6 8 MAX MAX31091AUA/V+T066 -40C to +125C Center 66.6 8 MAX MAX31091AUA/V+172 -40C to +125C Center 1.7 8 MAX MAX31091AUA/V+T172 -40C to +125C Center 1.7 8 MAX MAX31091AUA/V+200 -40C to +125C Center 0.20 8 MAX MAX31091AUA/V+T200 -40C to +125C Center 0.20 8 MAX MAX31091AUA/V+330 -40C to +125C Center 33.0 8 MAX MAX31091AUA/V+T330 -40C to +125C Center 33.0 8 MAX MAX31091AUA/V+192 -40C to +125C Center 1.9 8 MAX MAX31091AUA/V+T192 -40C to +125C Center 1.9 8 MAX MAX31091AUA/V+400 -40C to +125C Center 0.4 8 MAX MAX31091AUA/V+T400 -40C to +125C Center 0.4 8 MAX MAX31091AUA/V+027 -40C to +125C Center 27 8 MAX MAX31091AUA/V+T027 -40C to +125C Center 27 8 MAX /V denotes an automotive qualified part. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 MAX U8+4 21-0036 90-0092 www.maximintegrated.com Maxim Integrated 7 MAX31091 Automotive Temperature Range Spread-Spectrum EconOscillatorTM Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 0 3/14 Initial release 1 9/17 Added AEC-Q100 statement to Benefits and Features section, updated General Description and updated Ordering Information table 2 11/18 Updated Applications, Absolute Maximum Ratings, and Ordering Information, added Package Information section DESCRIPTION -- 1, 7 1, 2, 7 For pricing, delivery, and ordering information, please visit Maxim Integrated's online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. (c) 2018 Maxim Integrated Products, Inc. 8 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX31091AUA/V+T033 MAX31091AUA/V+T330 MAX31091AUA/V+172 MAX31091AUA/V+066 MAX31091AUA/V+T200 MAX31091AUA/V+033 MAX31091AUA/V+330 MAX31091AUA/V+T066 MAX31091AUA/V+T172 MAX31091AUA/V+200