MAX7375 3-Pin Silicon Oscillator General Description Features The MAX7375 is a silicon oscillator, intended as a low-cost ● 2.7V to 5.5V Operation improvement replacing ceramic resonators, crystals, and ● Factory-Trimmed Oscillator (600kHz to 9.99MHz) crystal oscillator modules used as the clock source for micro- controllers and UARTs in 3V, 3.3V, and 5V applications. ● No External Components Required The MAX7375 is a fully integrated oscillator, supplied at ● ±10mA Output Drive Current specific factory-trimmed frequencies with a rail-to-rail 50% ● 2% Initial Accuracy duty cycle square-wave output. The oscillator frequency is ● ±50ppm/°C Temp Drift generated directly without the use of a phase-locked loop (PLL). No additional components are used to set or adjust ● Fast Startup Time: 5µs the frequency. ● 40% to 60% Maximum Duty Cycle Unlike typical crystal and ceramic resonator oscillator circuits, ● 5ns Output Rise and Fall Time-Low EMI the MAX7375 is highly resistant to vibration and EMI. The high output drive current and absence of high-impedance ● Very Low EMI Susceptibility-No High-Impedance nodes also makes the oscillator less susceptible to dirty Nodes or humid operating conditions. With a wide operating tem- ● Very Low Jitter: 160ps at 8MHz P-P perature range, the oscillator is a good choice for demanding ● Tiny Surface-Mount Package (SC70) home appliance environments. ● -40°C to +125°C Temperature Range Available in 3-pin space-saving SC70 package, the MAX7375 is offered in standard and nonstandard factory- Ordering Information set frequencies ranging from 600kHz to 9.99MHz. See the MAX7381 data sheet for frequencies ≥ 10MHz. The PART TEMP RANGE PIN-PACKAGE MAX7375’s standard operating temperature range is MAX7375AXR105-T -40°C to +125°C 3 SC70-3 -40°C to +125°C. See the Applications Information sec- MAX7375AXR185-T -40°C to +125°C 3 SC70-3 tion for extended operating temperature range. MAX7375AXR365-T -40°C to +125°C 3 SC70-3 Applications MAX7375AXR375-T -40°C to +125°C 3 SC70-3 ● White Goods ● Portable Equipment ● Appliances and Controls ● Microcontroller Systems MAX7375AXR405-T -40°C to +125°C 3 SC70-3 ● Hand-Held Products MAX7375AXR425-T -40°C to +125°C 3 SC70-3 MAX7375AXR805-T -40°C to +125°C 3 SC70-3 Typical Application Circuit Note: The MAX7375 is available in factory-set frequencies from 600kHz to 9.99MHz. There are seven standard versions (1MHz, 1.84MHz, 3.58MHz, 3.69MHz, 4MHz, 4.19MHz, and 2.7V TO 5.5V 8MHz, as shown in the Selector Guide) with a required 2.5k order increment. Nonstandard frequencies are also available V+ CLOCK OSC1 µC with a required 10k order increment. For nonstandard versions, contact factory for availability and ordering information. All ver- sions available in tape-and-reel only. MAX7375 Pin Configuration and Selector Guide appear at end of data GND sheet. OSC2 19-3060; Rev 4; 4/14

MAX7375 3-Pin Silicon Oscillator Absolute Maximum Ratings V+ to GND ...............................................................-0.3V to +6V Operating Temperature Range .........................-55°C to +135°C CLOCK to GND ...........................................-0.3V to (V+ + 0.3V) Junction Temperature ......................................................+150°C Continuous Power Dissipation (TA = +70°C) Storage Temperature Range ............................-65°C to +150°C 3-Pin SC70 (derate 2.9mW/°C over +70°C) ................235mW Lead Temperature (soldering, 10s) .................................+300°C 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. Electrical Characteristics (V+ = 2.7V to 5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at V+ = 5V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V+ 2.7 5.5 V MAX7375A_R105 0.55 1.1 MAX7375A_R185 0.8 1.25 Operating Supply Current I+ mA MAX7375A_R405 1.7 4.2 MAX7375A_R805 3.2 6.4 V+ ≥ 2.7V, ISOURCE = 2.5mA V+ - 0.4 Output High Voltage VOH V V+ ≥ 4.5V, ISOURCE = 9mA V+ - 0.4 V+ ≥ 2.7, ISINK = 10mA 0.4 Output Low Voltage VOL V V+ ≥ 4.5V, ISINK = 20mA 0.4 V+ = 3.0V, MAX7375A_R_ _ _ -2 +2 Initial CLOCK Frequency TA = +25°C (Note 2) Accuracy fCLOCK V+ = 2.7V to 5.5V, % MAX7375A_R_ _ _ -4 +4 TA = +25°C (Note 2) CLOCK Frequency Temperature (Note 3) ±50 ±325 ppm/°C Sensitivity Duty Cycle (Note 3) 45 52 57 % Observation for 20s using a 500MHz Output Jitter oscilloscope (MAX7375A_R805) 160 psP-P Output Rise Time tR (Note 3) 5.0 ns Output Fall Time tF (Note 3) 2.5 ns Note 1: All parameters are tested at TA = +25°C. Specifications over temperature are guaranteed by design and characterization. Note 2: Typical frequencies are nominal values. Note 3: Guaranteed by design and characterization. Not production tested. www.maximintegrated.com Maxim Integrated │ 2

MAX7375 3-Pin Silicon Oscillator Typical Operating Characteristics (V+ = 5V, TA = +25°C, CL = 10pF, 8MHz output, unless otherwise noted.) DUTY CYCLE vs. TEMPERATURE DUTY CYCLE vs. SUPPLY VOLTAGE SUPPLY CURRENT vs. TEMPERATURE 555345 MAX7375 toc01 5535 MAX7375 toc02 34..50 V+ = 5V MAX7375 toc03 A) 3.0 DUTY CYCLE (%) 45559012 DUTY CYCLE (%) 4591 PPLY CURRENT (m 122...505 V+ = 3.3V 48 U S 1.0 47 47 V+ = 2.7V 0.5 46 45 45 0 -40 -25 -10 5 20 35 50 65 80 95 110125 2.7 3.4 4.1 4.8 5.5 -40 -25 -10 5 20 35 50 65 80 95 110125 TEMPERATURE (°C) SUPPLY VOLTAGE (V) TEMPERATURE (°C) SUPPLY CURRENT vs. SUPPLY VOLTAGE FREQUENCY vs. SUPPLY VOLTAGE FREQUENCY vs. TEMPERATURE 34..50 MAX7375 toc04 Y11..000002 MAX7375 toc05 Y11..001250 MAX7375 toc06 URRENT (mA) 23..50 D FREQUENC00..999968 D FREQUENC111...000010005 C E E PPLY 2.0 MALIZ0.994 MALIZ0.995 U R R S NO NO0.990 1.5 0.992 0.985 1.0 0.990 0.980 2.7 3.4 4.1 4.8 5.5 2.7 3.4 4.1 4.8 5.5 -40 -15 10 35 60 85 110 135 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) TEMPERATURE (°C) CLOCK OUTPUT WAVEFORM SUPPLY CURRENT vs. FREQUENCY SETTLING TIME FROM START WITH CL = 10pF 34..50 V+ = 5.5V MAX7375 toc07 MAX7375 toc08 MAX7375 toc09 A) 3.0 CLOCK T (m 2V/div N 2.5 E R R U 2.0 V+ = 5V CLOCK Y C V+ = 3.3V V+ 1V/div PL 1.5 2V/div P U S 1.0 0.5 V+ = 2.7V V+ = 3.3V V+ = 3.3V 0 0.5 2.5 4.5 6.5 8.5 1µs/div 40ns/div FREQUENCY (MHz) www.maximintegrated.com Maxim Integrated │ 3

MAX7375 3-Pin Silicon Oscillator Typical Operating Characteristics (continued) (V+ = 5V, TA = +25°C, CL = 10pF, 8MHz output, unless otherwise noted.) CLOCK OUTPUT WAVEFORM CLOCK OUTPUT WAVEFORM WITH CL = 50pF WITH CL = 100pF MAX7375 toc10 MAX7375 toc11 CLOCK CLOCK 1V/div 1V/div V+ = 3.3V V+ = 3.3V 40ns/div 40ns/div Pin Description PIN NAME FUNCTION SC70 1 V+ Positive Supply Voltage 2 CLOCK Clock Output. Output is push-pull. 3 GND Ground Detailed Description supply connected 500Ω load to within 300mV of either supply rail. The clock output remains stable over the full The MAX7375 is a replacement for ceramic resonators, operating voltage range and does not generate short out- crystals, and crystal oscillator modules as the clock put cycles during either power on or power off. A typical source for microcontrollers and UARTs in 3V, 3.3V, and startup characteristic is shown in the Typical Operating 5V applications. The MAX7375 is an integrated oscilla- Characteristics section. tor, supplied at specific frequencies just like crystals and resonators. A variety of popular standard frequencies are Output Jitter available. No external components are required for setting The MAX7375’s jitter performance is given in the Electrical or adjusting the frequency. Characteristics table as a peak-to-peak value obtained Supply Voltages by observing the output of the MAX7375 for 20s with a 500MHz oscilloscope. Jitter measurements are approxi- The MAX7375 has been designed for use in systems with mately proportional to the period of the output frequency nominal supply voltages of 3V, 3.3V, or 5V and is speci- of the device. Thus, a 4MHz part has approximately twice fied for operation with supply voltages in the 2.7V to 5.5V the jitter value of an 8MHz part. range. Operation outside this range is not guaranteed. See the Absolute Maximum Ratings table for limit values The jitter performance of all clock sources degrades in the of power-supply and pin voltages. presence of mechanical and electrical interference. The MAX7375 is relatively immune to vibration, shock, and Oscillator EMI influences and thus provides a considerably more The clock output is a push-pull configuration and is capa- robust clock source than crystal- or ceramic-resonator- ble of driving a ground-connected 1kΩ load or a positive based oscillator circuits. www.maximintegrated.com Maxim Integrated │ 4

MAX7375 3-Pin Silicon Oscillator Applications Information Extended Temperature Operation The MAX7375 was tested to +135°C during product Interfacing to a Microcontroller Clock Input characterization and shown to function normally at this The MAX7375 clock output is a push-pull, CMOS, logic temperature (see Typical Operating Characteristics). output, which directly drives any microprocessor (µP) or However, production test and qualification is only per- microcontroller (µC) clock input. There are no impedance- formed from -40°C to +125°C at this time. Contact the matching issues when using the MAX7375. Operate factory if operation outside this range is required. the MAX7375 and microcontroller (or other clock input device) from the same supply voltage level. Refer to the Power-Supply Considerations microcontroller data sheet for clock input compatibility The MAX7375 operates with power-supply voltages in with external clock signals. the 2.7V to 5.5V range. Good power-supply decoupling The MAX7375 requires no biasing components or load is needed to maintain the power-supply rejection per- capacitance. When using the MAX7375 to retrofit a crys- formance of the MAX7375. Use a 0.1µF surface-mount tal oscillator, remove all biasing components from the ceramic capacitor connected between V+ and GND and oscillator input. mounted as close as possible to the device. If possible, mount the MAX7375 close to the microcontroller’s decou- Startup Performance pling capacitor so that additional decoupling is not required. The MAX7375 oscillator output stabilizes within a few A larger value of bypass capacitor is recommended if the cycles of operation after V+ rises to a sufficient voltage to MAX7375 is to operate with a large capacitive load. Use start the oscillator, typically 1.65V at +25°C. Use a reset a bypass capacitor value of at least 1000 times that of the or similar voltage-detection circuit to disable devices con- output load capacitance. nected to the MAX7375 until 5µs after the voltage on V+ has risen above 2.7V. Selector Guide Pin Configuration PART FREQUENCY (MHz) TOP MARK TOP VIEW MAX7375AXR105 1.00 AOV MAX7375AXR185 1.84 AOU MAX7375AXR365 3.58 AOT V+ 1 MAX7375AXR375 3.69 AOS MAX7375AXR 3 GND MAX7375AXR405 4.00 AOR MAX7375AXR425 4.19 AOQ CLOCK 2 MAX7375AXR805 8.00 AOP SC70 Chip Information PROCESS: BiCMOS www.maximintegrated.com Maxim Integrated │ 5

MAX7375 3-Pin Silicon Oscillator 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 DOCUMENT NO. LAND PATTERN NO. 3 SC70 X3-2 21-0075 90-0208 www.maximintegrated.com Maxim Integrated │ 6

MAX7375 3-Pin Silicon Oscillator Revision History REVISION REVISION PAGES DESCRIPTION NUMBER DATE CHANGED 0 10/03 Initial release — 1 — — — 2 — — — 3 12/07 Removed all references to MAX7375AUR_ and SOT23 package 1, 2, 4, 5 4 4/14 Removed automotive reference from General Description and Applications 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. 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. © 2014 Maxim Integrated Products, Inc. │ 7