Ultra Series Crystal Oscillator Si540 Data Sheet Ultra Low Jitter Any-Frequency XO (125 fs), 0.2 to 1500 MHz KEY FEATURES th The Si540 Ultra Series oscillator utilizes Silicon Laboratories advanced 4 Available with any frequency from 0.2 MHz to generation DSPLL technology to provide an ultra-low jitter, low phase noise 1500 MHz clock at any output frequency. The device is factory-programmed to any frequency Very low jitter: 125 fs Typ RMS from 0.2 to 1500 MHz with <1 ppb resolution and maintains exceptionally low (12 kHz 20 MHz) jitter for both integer and fractional frequencies across its operating range. The Excellent PSNR and supply noise immunity: Si540 offers excellent reliability and frequency stability as well as guaranteed 80 dBc Typ aging performance. On-chip power supply filtering provides industry-leading power 7 ppm stability option (-40 to 85C) supply noise rejection, simplifying the task of generating low jitter clocks in noisy systems that use switched-mode power supplies. Offered in industry-standard 3.3 V, 2.5 V and 1.8 V V supply operation DD footprints, the Si540 has a dramatically simplified supply chain that enables Silicon from the same part number Labs to ship custom frequency samples 1-2 weeks after receipt of order. Unlike LVPECL, LVDS, CML, HCSL, CMOS, and a traditional XO, where a different crystal is required for each output frequency, Dual CMOS output options the Si540 uses one simple crystal and a DSPLL IC-based approach to provide 2.53.2, 3.25, 5x7 mm package options the desired output frequency. This process also guarantees 100% electrical testing Any custom frequency available with 1-2 of every device. The Si540 is factory-configurable for a wide variety of user specifi- week lead times cations, including frequency, output format, and OE pin location/polarity. Specific configurations are factory-programmed at time of shipment, eliminating the long lead times associated with custom oscillators. APPLICATIONS 100G/200G/400G OTN, coherent optics Pin Assignments 10G/40G/100G optical ethernet 3G-SDI/12G-SDI/24G-SDI broadcast video OE/NC 1 6 VDD Servers, switches, storage, NICs, search acceleration Test and measurement NC/OE 2 5 CLK- Clock and data recovery FPGA/ASIC clocking 3 4 CLK+ GND (Top View) Fixed Frequency Pin Descriptions Frequency Flexible Low Crystal DSPLL Noise 1, 2 Selectable via ordering option Driver DCO OE = Output enable NC = No connect Digital Digital OSC Phase Error Phase Loop Cancellation Detector Filter 3 GND = Ground Flexible Phase Error Formats, 1.8V 3.3V 4 CLK+ = Clock output Fractional Operation Divider NVM 5 CLK- = Complementary clock output. Not used Control Power Supply Regulation for CMOS. 6 VDD = Power supply Output Enable Built-in Power Supply (Pin Control) Noise Rejection Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 Rev. 1.3 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 23, 2021 1Si540 Data Sheet Ordering Guide 1. Ordering Guide The Si540 XO supports a variety of options including frequency, output format, and OE pin location/polarity, as shown in the chart below. Specific device configurations are programmed into the part at time of shipment, and samples are available in 1-2 weeks. Silicon Laboratories provides an online part number configuration utility to simplify this process. Refer to www.silabs.com/oscillators to access this tool and for further ordering instructions. 2 XO Series Description Temp Stability Total Stability Package Temperature Grade 540 Single Frequency A A 5x7 mm G -40 to 85 C 20 ppm 50 ppm B 10 ppm 25 ppm B 3.2x5 mm C 7 ppm 20 ppm C 2.5x3.2 mm 540 A A A - - - - - - - A C G R Device Revision Order Signal Format VDD Range OE Pin OE Polarity Option Reel LVPECL 2.5, 3.3 V A A Pin 1 Active High R Tape and Reel LVDS 1.8, 2.5, 3.3 V B B Pin 1 Active Low <Blank> Coil Tape CMOS 1.8, 2.5, 3.3 V C C Pin 2 Active High CML 1.8, 2.5, 3.3 V D D Pin 2 Active Low 3 Frequency Code Description HCSL 1.8, 2.5, 3.3 V E Mxxxxxx FCLK < 1 MHz Dual CMOS 1.8, 2.5, 3.3 V F xMxxxxx 1 MHz F CLK < 10 MHz (In-Phase) xxMxxxx 10 MHz FCLK < 100 MHz Dual CMOS 1.8, 2.5, 3.3 V G (Complementary) xxxMxxx 100 MHz FCLK < 1000 MHz xxxxMxx 1000 MHz FCLK 1500 MHz HCSL-Fast 1.8, 2.5, 3.3 V H xxxxxx Custom code if F CLK > 6 digits 1 Custom 1.8, 2.5, 3.3 V X Notes: 1. Contact Silicon Labs for non-standard configurations. 2. Total stability includes temp stability, initial accuracy, load pulling, VDD variation, and 20 year aging at 70 C. 3. For example: 156.25 MHz = 156M250 25 MHz = 25M0000. Create custom part numbers at www.silabs.com/oscillators. 1.1 Technical Support Frequently Asked Questions (FAQ) www.silabs.com/Si540-FAQ Oscillator Phase Noise Lookup Utility www.silabs.com/oscillator-phase-noise-lookup Quality and Reliability www.silabs.com/quality Development Kits www.silabs.com/oscillator-tools Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 Rev. 1.3 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 23, 2021 2