EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts   Clocks & Timing  Clock Generators & PLLs    SI5351B-B-GM1R
SI5351B-B-GM1R

SI5351B-B-GM1R

Skyworks Solutions Inc.
Clock Generator, VCXO IC 200MHz 1 16-VFQFN Exposed Pad
Active
Datasheet Digi-Key Compare Prices

Overview

The SI5351B-B-GM1R is an I2C-configurable clock generator and VCXO that supports frequencies up to 200MHz. It utilizes a MultiSynth fractional divider architecture to synthesize any frequency on each of its outputs with 0 ppm error, replacing multiple crystals and oscillators in complex designs.

Why Choose This Part

This IC eliminates the need for expensive custom crystals by using a standard 25 or 27 MHz crystal to generate any output frequency. Its separate voltage supply pins allow for easy level translation between 1.8V, 2.5V, and 3.3V logic levels without external buffers.

Applications

Consumer Electronics
Ideal for digital cameras, video projectors, and gaming consoles where multiple independent clock signals are required.
Network Equipment
Provides low-jitter clocking for Ethernet switches, routers, and PCIe Gen 1 compatible systems.
Audio/Video Processing
Used in professional video equipment and high-end audio systems to synchronize multiple data streams with precise phase control.
VCXO Replacement
Functions as a highly linear voltage-controlled crystal oscillator for frequency pulling applications.

Key Specifications

PLL Yes
Type Clock Generator, VCXO
Input Clock, Crystal
Output LVCMOS
Mounting Type Surface Mount
Package / Case 16-VFQFN Exposed Pad
Frequency - Max 200MHz
Voltage - Supply 2.25V ~ 2.75V, 3V ~ 3.6V
Divider/Multiplier Yes/No
Number of Circuits 1
Ratio - Input:Output 1:4
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 16-QFN (3x3)
Differential - Input:Output No/No

Getting Started

Configuration is handled via the I2C interface using Skyworks ClockBuilder Pro software to generate register maps. Engineers should ensure the 16-VFQFN thermal pad is properly soldered to a ground plane to manage thermal performance and signal integrity at high frequencies.

Also Consider

SI5351A-B-GT Skyworks Solutions Inc. - Select this variant if a VCXO function is not required and a standard 10-MSOP package is preferred for easier prototyping.

Categories

Clocks & Timing > Clock Generators & PLLs Clocks & Timing
The 2026 Embedded Online Conference