Si569 Datasheet | Skyworks Solutions

Ultra Series™ Crystal Oscillator (VCXO) Si569 Data Sheet Ultra Low Jitter I2C Programmable VCXO (100 fs), 0.2 to 3000 MHz The Si569 Ultra Series™ voltage-controlled crystal oscillator utilizes Skyworks Solutions’ advanced 4th generation DSPLL® technology to provide an ultra-low jitter, low phase noise clock at any output frequency. The device is user-programmed via simple I2C mands to provide any frequency from 0.2 to 3000 MHz with <1 ppb resolution and maintains exceptionally low jitter for both integer and fractional frequencies across its operating range. On-chip power supply filtering provides industry-leading power supply noise rejection, simplifying the task of generating low jitter clocks in noisy systems that use switched-mode power supplies. Unlike a traditional XO, where a different crystal is required for each output frequency, the Si569 uses one simple crystal and a DSPLL IC-based approach to provide the desired output frequency. The Si569 is factory-configurable for a wide variety of user specifications, including startup frequency, I2C address, output format, and OE pin location/polarity. Specific configurations are factory-programmed at time of shipment, eliminating long lead times associated with custom oscillators. Pin Assignments VC 1 6 VDD OE/FS 2 5 CLK- 5 x 7 mm and 3.2 x 5 mm 2.5 x 3.2 mm (Top View) CLK+ Pin # 1 2 3 4 5 6 7 8 Descriptions VC = Voltage Control Pin Selectable via ordering option OE = Output enable; FS = Frequency Select GND = Ground CLK+ = Clock output CLK- = plementary clock output. Not used for CMOS. VDD = Power supply SDA = I2C Serial Data SCL = I2C Serial Clock KEY Features - I2C programmable to any frequency from 0.2 to 3000 MHz with < 1 ppb resolution - Ultra low jitter: 100 fs RMS Typ (12 k Hz - 20 MHz) - Configure up to 2 pin-selectable startup frequencies - I2C interface supports 100 kbps, 400 kbps, and 1 Mbps (Fast Mode Plus) - Excellent PSNR and supply noise immunity: - 80 d Bc...