Content for Si5351

Si5351

The Si5351 is an I2C configurable clock generator that is ideally suited for replacing crystals, crystal oscillators, VCXOs, phase-locked loops (PLLs), and fanout buffers in cost-sensitive applications. Based on a PLL/VCXO + high resolution MultiSynth fractional divider architecture, the Si5351 can generate any frequency up to 200 MHz on each of its outputs with 0 ppm error. Three versions of the Si5351 are available to meet a wide variety of applications. The Si5351A generates up to 8 free-running clocks using an internal oscillator for replacing crystals and crystal oscillators. The Si5351B adds an internal VCXO and provides the flexibility to replace both free-running clocks and synchronous clocks. It eliminates the need for higher cost, custom pullable crystals while providing reliable operation over a wide tuning range. The Si5351C offers the same flexibility but synchronizes to an external reference clock (CLKIN).

Variable Frequency Oscillator

“This is my remake of Mirko Pavleski’s Universal VFO 10 KHz-160 MHz with Retro Analog Scale project. The Si5351 Clock Generator has three independent outputs. Each one can have a different frequency. Part of this redesign is to make …

DIY Arduino Superheterodyne Receiver

“In this project, we will upgrade a traditional shortwave superheterodyne receiver with an Arduino base tuner. This tuner is capable of receiving shortwave broadcasts on 41m band and above. This modularized receiver consists of a transistor base mixer, I.F …

10kHz to 225MHz VFO/RF Generator with Si5351 - Version 2

“For use in DIY homebrew radio equipment such superheterodyne receivers, SDR, HAM QRP transceivers or RF generator. This is a project of a VFO (variable frequency oscillator) for use in DIY homebrew radio equipement such as Superheterodyne Receivers, DCR, SDR …

Clock Generator With Si5351 and Blue Pill

“Clock generator I recently build a pulse generator and it does its job well. It produces pulses of variable length and at several frequencies. But the number of frequencies it can produce is limited and for many jobs the length …

Super Sized Acryllic Spectrum Analyzer

“Why would you want to look at those tiny led displays or those small LCD’s if you can do it big? This is a step by step description on how to build your own Giant sized Spectrum analyzer. Using …

DIY SW, MW, SDR Radio with ESP32 and Si5351

“Sensitive retro look radio capable of receiving signals from middle wave and short wave band. This radio receiver is capable of receiving all MW and SW bandwidth, and can also operate as an SDR receiver, so with the help of …

Compact Si5351 based SDR

“This is a revised version of my FV-1 based SDR. I replaced the CS2100 clk generator with the Si5351 clk generator. The Si5351 has some advantages over the CS2100, namely you can generate quadrature clks directly. This simplifies the …