Evaluation Kit Design Tools Support Available Resources and Models Click here to ask an associate for production status of specific part numbers. Silicon Oscillator with Low-Power MAX7377 Frequency Switching General Description Features The MAX7377 dual-speed silicon oscillator with reset is 2.7V to 5.5V Operation a replacement for ceramic resonators, crystals, crystal Accurate High-Speed 600kHz to 10MHz Oscillator oscillator modules, and discrete reset circuits. The device Accurate Low-Speed 32kHz Oscillator provides the primary and secondary clock source for microcontrollers in 3V, 3.3V, and 5V applications. The Glitch-Free Switch Between High Speed and Low Speed at Any Time MAX7377 features a factory-programmed high-speed oscillator, a 32.768kHz oscillator, and a clock selec- 10mA Clock-Output Drive Capability tor input. The clock output can be switched at any time 2% Initial Accuracy between the high-speed clock and the 32.768kHz clock 50ppm/C Temperature Coefficient for low-power operation. Switchover is synchronized inter- nally to provide glitch-free clock switching. 50% Duty Cycle Unlike typical crystal and ceramic resonator oscillator 5ns Output Rise and Fall Time circuits, the MAX7377 is resistant to vibration and EMI. Low Jitter: 160ps at 8MHz (No PLL) (P-P) The high-output-drive current and absence of high- 3mA Fast-Mode Operating Current (8MHz) impedance nodes make the oscillator less susceptible to dirty or humid operating conditions. With a wide operating 13A Slow-Mode Operating Current (32kHz) temperature range as standard, the MAX7377 is a good -40C to +125C Temperature Range choice for demanding home appliance and industrial environments. The MAX7377 is available in factory-programmed fre- quencies from 32.768kHz to 10MHz. See Table 1 for Ordering Information standard frequencies and contact the factory for custom PIN- PKG frequencies. PART TEMP RANGE PACKAGE CODE The MAX7377 is available in a 5-pin SOT23 package. MAX7377AX -T -40C to +125C 5 SOT23-5 U5-2 Refer to the MAX7383 data sheet for frequencies 10MHz. The first two letters are AX. See Table 1 at the end of the data The MAX7377 standard operating temperature range is sheet for the two-letter code. -40C to +125C. See the Applications Information sec- tion for the extended operating temperature range. Applications Pin Configuration White Goods Portable Equipment TOP VIEW Consumer Products Microcontroller Systems Appliances and Controls Handheld Products CLOCK 1 5 E.C. MAX7377 2 GND SPEED 3 4 V CC SOT23 Typical Application Circuit appears at end of data sheet. 19-3474 Rev 4 1/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX7377 Silicon Oscillator with Low-Power Frequency Switching Absolute Maximum Ratings V to GND .............................................................-0.3V to +6V Operating Temperature Range...........................-40C to +135C CC All Other Pins to GND ................................-0.3V to (V + 0.3V) Junction Temperature.......................................................+150C CC CLOCK Current ................................................................10mA Storage Temperature Range..............................-60C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s)..................................+300C A 5-Pin SOT23 (derate 7.1mW/C above +70C) ...................571mW (U5 - 2) 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, T = -40C to +125C, unless otherwise noted. Typical values are at V = 5V and T = +25C.) (Note 1) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V 2.7 5.5 V CC f = 8MHz, no load 3 5 mA CLOCK Operating Supply Current I CC f = 32.768kHz, no load 13 25 A CLOCK Operating Supply Voltage Ramp V (Note 4) 10 1000 s RAMP LOGIC INPUT (SPEED) Input High Voltage V 0.7 x V V IH CC Input Low Voltage V 0.3 x V V IL CC Input Current I 2 A IN CLOCK OUTPUT V = 4.5V, I = 9mA V - 0.4 CC SOURCE CC Output High Voltage V V OH V = 2.7V, I = 2.5mA V - 0.4 CC SOURCE CC V = 4.5V, I = 20mA 0.4 CC SINK Output Low Voltage V V OL V = 2.7V, I = 10mA 0.4 CC SINK V = 5V, T = +25C (Note 2) -2 +2 Initial Fast CLOCK Frequency CC A f % FCLOCK Accuracy V = 2.7V to 5.5V, T = +25C -4 +4 CC A Fast CLOCK Frequency (Note 3) 50 325 ppm/C Temperature Sensitivity V = 5V, T = +25C (Note 2) 32.440 32.768 33.096 Initial Slow CLOCK Frequency CC A f kHz SCLOCK Accuracy V = 2.7V to 5.5V, T = +25C 31.785 33.751 CC A Slow CLOCK Frequency o (Note 3) 50 325 ppm/ C Temperature Sensitivity CLOCK Output Duty Cycle 43 50 57 % Observation of 8MHz output for CLOCK Output Jitter 160 ps P-P 20s using a 500MHz oscilloscope CLOCK Output Rise Time t 10% to 90% 5 ns R CLOCK Output Fall Time t 90% to 10% 5 ns F Startup Delay V rising from 0 to 5V in 1s 100 s CC CLOCK Output Enable V rising 2.49 2.57 2.70 V CC Output Undervoltage Lockout V 45 mV THYS Hysteresis Note 1: All parameters are tested at T = +25C. Specifications over temperature are guaranteed by design. A Note 2: The frequency is determined by part number selection. See Table 1. Note 3: Guaranteed by design. Not production tested. Note 4: Guaranteed by design. Part will function outside tested range. Analog Devices 2 www.analog.com