{"product_id":"adafruit-si5351a-clock-generator-with-stemma-qt-8khz-to-160mhz","title":"Adafruit Si5351A Clock Generator with STEMMA QT - 8KHz to 160MHz","description":"\u003cp\u003eNever hunt around for another crystal again, with the Si5351A clock generator breakout from Adafruit!\u003c\/p\u003e\n\u003cp\u003eThis chip has a precision 25MHz crystal reference and internal PLL and dividers so it can generate just about any frequency, from \u0026lt;8KHz up to 150+ MHz.\u003c\/p\u003e\n\u003cp\u003eThe Si5351A clock generator is an I2C controller clock generator. It uses the onboard precision clock to drive multiple PLL's and clock dividers using I2C instructions. By setting up the PLL and dividers you can create precise and arbitrary frequencies. There are three independent outputs, and each one can have a different frequency. Outputs are 3Vpp, either through a breadboard-friendly header or, for RF work, an optional edge-launch SMA connector for output #1.\u003c\/p\u003e\n\u003cp\u003eTo get you going fast, Adafruit spun up a custom-made PCB in the \u003ca href=\"\/en-eu\/collections\/stemma-qt\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSTEMMA QT form factor\u003c\/a\u003e, making it easy to interface with. The \u003ca href=\"https:\/\/learn.adafruit.com\/introducing-adafruit-stemma-qt\/what-is-stemma-qt\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSTEMMA QT connectors\u003c\/a\u003e on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the Si5351 or to chain it with a wide range of other sensors and accessories using a \u003ca href=\"\/en-eu\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ecompatible cable\u003c\/a\u003e. Onboard 3.3V LDO and level shifters means its ready for use with 3V or 5V power and logic!\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-si5351-clock-generator-breakout\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eBest of all, Adafruit even have a great tutorial and library to get you started!\u003c\/a\u003e Their code is designed for use with the Arduino-compatible microcontrollers and CircuitPython\/Python using I2C support.\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-si5351-clock-generator-breakout\/downloads\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDatasheets, PCB CAD files, and Fritzing objects available in tutorial\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSi5351 specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenerates up to 3 non-integer-related frequencies from 8 kHz to 160 MHz\u003c\/li\u003e\n\u003cli\u003eI2C user definable configuration  Exact frequency synthesis at each output (0 ppm error)\u003c\/li\u003e\n\u003cli\u003eHighly linear VCXO\u003c\/li\u003e\n\u003cli\u003eLow output period jitter: 100 ps pp\u003c\/li\u003e\n\u003cli\u003eConfigurable spread spectrum selectable at each output\u003c\/li\u003e\n\u003cli\u003eOperates from a low-cost, fixed frequency crystal: 25 MHz on board\u003c\/li\u003e\n\u003cli\u003eSupports static phase offset\u003c\/li\u003e\n\u003cli\u003eProgrammable rise\/fall time control\u003c\/li\u003e\n\u003cli\u003eGlitchless frequency changes\u003c\/li\u003e\n\u003cli\u003eExcellent PSRR eliminates external power supply filtering\u003c\/li\u003e\n\u003cli\u003eVery low power consumption\u003c\/li\u003e\n\u003cli\u003eAdjustable output-output dela\u003c\/li\u003e\n\u003cli\u003ePCIE Gen 1 compliant\u003c\/li\u003e\n\u003cli\u003eSupports HCSL compatible swing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 25.3mm x 17.7mm x 4.7mm \/ 1.0\" x 0.7\" x 0.2\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 1.7g \/ 0.1oz\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":40411504934995,"sku":"ADA5640","price":8.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/5640-00.jpg?v=1668167949","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-si5351a-clock-generator-with-stemma-qt-8khz-to-160mhz","provider":"Pimoroni Ltd","version":"1.0","type":"link"}