Home>Components>SI5351 Clock Generator: Datasheet, Pinout and Applications

SI5351 Clock Generator: Datasheet, Pinout and Applications

Q: How does SI5351 work?

The Si5351 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.

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Published: 31 August 2021 | Last Updated: 31 August 2021

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datasheet pdf and product details from stock available at Utmel

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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. This article mainly covers datasheet, pinout, applications, features, and other details about Si5351.

Adafruit Si5351 breakout board

Catalog

SI5351 Pinout

si5351 pinout .png

si5351 pin description.png

SI5351 CAD Model

Symbol

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Footprint

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3D Model

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SI5351 Description

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 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.

Specifications

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SI5351 Functional Block Diagram

si5351 functional block diagram.png

SI5351 Features

Generates up to eight non-interrelated frequencies from 2.5 kHz to 200 MHz
I2C user-definable configuration
Exact frequency synthesis at each output (0 ppm error)
Highly linear VCXO
The optional clock input (CLKIN)
Low output period jitter: < 70 ps pp, typ
Configurable spread spectrum selectable at each output
Operates from a low-cost, fixed frequency crystal: 25 or 27 MHz
Supports static phase offset
Programmable rise/fall time control
Glitch fewer frequency changes
Separate voltage supply pins provide the level translation:
Core VDD: 2.5 or 3.3 V
Output VDDO: 1.8, 2.5, or 3.3 V
Excellent PSRR eliminates external power supply filtering
Very low power consumption
Adjustable output delay
Available in three packages types:
10-MSOP: 3 outputs
16-QFN (3x3 mm): 4 outputs
20-QFN (4x4 mm): 8 outputs
PCIe Gen 1 compatible
Supports HCSL compatible swing

SI5351 Applications

Audio/video equipment, gaming
Printers, scanners, projectors
Handheld Instrumentation
Laser range finder
Residential gateways
Networking/communication
Servers, storage
XO replacement

SI5351 Alternatives

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SI5351 Package

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SI5351 Manufacturer

Silicon Labs is a leader in secure, intelligent wireless technology for a more connected world. Our integrated hardware and software platform, intuitive development tools, unmatched ecosystem, and robust support make us the ideal long-term partner in building advanced industrial, commercial, home, and life applications. We make it easy for developers to solve complex wireless challenges throughout the product lifecycle and get to market quickly with innovative solutions that transform industries, grow economies and improve lives.

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Frequently Asked Questions

What is SI5351 used for?

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.

How does SI5351 work?

The Si5351 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.

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