SI5351C-B CMOS Clock Generator: Pinout, Features and Datasheet

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Published: 21 March 2022 | Last Updated: 21 March 2022

2220

SI5351C-B-GM

SI5351C-B-GM

Silicon Labs

2.5V Clock Generator SI5351 Clock Generators MultiSynth™ Series 20-VFQFN Exposed Pad 20 Terminals Surface Mount 1.71V~3.6V Tray

Purchase Guide

2.5V Clock Generator SI5351 Clock Generators MultiSynth™ Series 20-VFQFN Exposed Pad 20 Terminals Surface Mount 1.71V~3.6V Tray

The SI5351C-B is a versatile I²C programmable clock generator that is ideally suited for replacing crystals, crystal oscillators, VCXOs, PLLs, and buffers. The SI5351C-B offers the same flexibility but synchronizes to an external reference clock (CLKIN). Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

Through this video, you can learn about Clock Generator’s definition, meaning and explanation.

What is CLOCK GENERATOR? What does CLOCK GENERATOR mean? CLOCK GENERATOR meaning & explanation

SI5351C-B Pinout

The following figure is the diagram of SI5351C-B Pinout.

Pinout.png

Pinout


SI5351C-B CAD Model

The followings are SI5351C-B Symbol, Footprint, and 3D Model.

PCB Symbol.png

PCB Symbol


PCB Footprint.png

PCB Footprint


3D Model.png

3D Model


SI5351C-B Overview

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).

This article will introduce SI5351C-B systematically from its features, pinout to its specifications, applications, also including SI5351C-B datasheet and so much more.


SI5351C-B Features

● Generates up to eight non-integerrelated frequencies from 2.5 kHz to 200 MHz

● I²C user definable configuration

● Exact frequency synthesis at each output (0 ppm error)

● Highly linear VCXO

● 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

● Glitchless frequency changes

● Separate voltage supply pins provide 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


Specifications

Silicon Labs SI5351C-B-GM technical specifications, attributes, parameters and parts with similar specifications to Silicon Labs SI5351C-B-GM.
  • Type
    Parameter
  • Factory Lead Time
    6 Weeks
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Surface Mount
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    20-VFQFN Exposed Pad
  • Surface Mount

    having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.

    YES
  • Number of Pins
    20
  • Weight
    42.467586mg
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    -40°C~85°C
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Tray
  • Series

    In electronic components, the "Series" refers to a group of products that share similar characteristics, designs, or functionalities, often produced by the same manufacturer. These components within a series typically have common specifications but may vary in terms of voltage, power, or packaging to meet different application needs. The series name helps identify and differentiate between various product lines within a manufacturer's catalog.

    MultiSynth™
  • Published
    2000
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    2 (1 Year)
  • Number of Terminations
    20
  • ECCN Code

    An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.

    EAR99
  • Type
    Clock Generator
  • Additional Feature

    Any Feature, including a modified Existing Feature, that is not an Existing Feature.

    ALSO OPERATES AT 3.3 V SUPPLY
  • Voltage - Supply

    Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.

    1.71V~3.6V
  • Terminal Position

    In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.

    QUAD
  • Supply Voltage

    Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.

    2.5V
  • Terminal Pitch

    The center distance from one pole to the next.

    0.5mm
  • Frequency

    In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.

    200MHz
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    SI5351
  • Output

    In electronic components, the parameter "Output" typically refers to the signal or data that is produced by the component and sent to another part of the circuit or system. The output can be in the form of voltage, current, frequency, or any other measurable quantity depending on the specific component. The output of a component is often crucial in determining its functionality and how it interacts with other components in the circuit. Understanding the output characteristics of electronic components is essential for designing and troubleshooting electronic circuits effectively.

    LVCMOS
  • Number of Outputs
    8
  • Number of Circuits
    1
  • Operating Supply Current

    Operating Supply Current, also known as supply current or quiescent current, is a crucial parameter in electronic components that indicates the amount of current required for the device to operate under normal conditions. It represents the current drawn by the component from the power supply while it is functioning. This parameter is important for determining the power consumption of the component and is typically specified in datasheets to help designers calculate the overall power requirements of their circuits. Understanding the operating supply current is essential for ensuring proper functionality and efficiency of electronic systems.

    45mA
  • Input

    In electronic components, "Input" refers to the signal or data that is provided to a device or system for processing or manipulation. It is the information or command that is received by the component to initiate a specific function or operation. The input can come from various sources such as sensors, other electronic devices, or user interactions. It is crucial for the proper functioning of the component as it determines how the device will respond or behave based on the input received. Understanding and managing the input parameters is essential in designing and using electronic components effectively.

    Clock, Crystal
  • Ratio - Input:Output

    The parameter "Ratio - Input:Output" in electronic components refers to the relationship between the input and output quantities of a device or system. It is a measure of how the input signal or energy is transformed or converted into the output signal or energy. This ratio is often expressed as a numerical value or percentage, indicating the efficiency or effectiveness of the component in converting the input to the desired output. A higher ratio typically signifies better performance or higher efficiency, while a lower ratio may indicate losses or inefficiencies in the conversion process. Understanding and optimizing the input-output ratio is crucial in designing and evaluating electronic components for various applications.

    2:8
  • Primary Clock/Crystal Frequency-Nom

    The parameter "Primary Clock/Crystal Frequency-Nom" refers to the nominal frequency at which a clock or crystal oscillator operates in electronic components. This frequency is critical for synchronizing the timing of various processes within a circuit or system. It is typically specified in hertz and indicates the standard or average frequency that the oscillator is designed to achieve under normal operating conditions. Accurate frequency is essential for ensuring proper functioning and performance of digital circuits and communication systems.

    54MHz
  • PLL

    PLL stands for Phase-Locked Loop, which is a control system that generates an output signal whose phase is related to the phase of an input signal. It is commonly used in electronic components to synchronize, modulate, demodulate, filter, or recover a signal's frequency. A PLL typically consists of a phase detector, a loop filter, a voltage-controlled oscillator (VCO), and a feedback circuit. The PLL locks the phase of the output signal to the phase of the input signal, making it a versatile tool in various applications such as frequency synthesis, clock recovery, and frequency modulation.

    Yes
  • Differential - Input:Output

    Differential - Input:Output refers to the relationship between the input and output signals in differential amplifiers or circuits. It measures the difference in voltage between two input terminals and produces an output that is proportional to this difference. This parameter is essential for noise rejection and improving signal integrity in various applications, such as operational amplifiers and data acquisition systems. It allows circuits to effectively amplify small signals while minimizing interference and common-mode noise.

    No/No
  • Max Duty Cycle

    Max Duty Cycle refers to the maximum percentage of time that an electronic component, such as a switch or a power supply, can be in an "on" state during a defined time period. It is an important parameter in pulse-width modulated (PWM) systems and helps determine how often a device can operate without overheating or sustaining damage. By specifying the maximum duty cycle, manufacturers provide guidance on the safe operational limits of the component, ensuring reliability and efficiency in various applications.

    55 %
  • Divider/Multiplier

    The parameter "Divider/Multiplier" in electronic components refers to a feature that allows the component to divide or multiply an input signal by a certain factor. This feature is commonly found in components such as operational amplifiers, voltage regulators, and signal processing circuits. In the context of operational amplifiers, the Divider/Multiplier parameter indicates the ability of the amplifier to scale the input signal by a specific factor, either dividing it or multiplying it. This can be useful for adjusting the amplitude or gain of a signal in a circuit.Overall, the Divider/Multiplier parameter provides flexibility in signal processing applications by allowing users to manipulate the input signal according to their specific requirements, whether it involves scaling down the signal for further processing or amplifying it for increased output.

    Yes/No
  • Duty Cycle

    the percentage of the ratio of pulse duration, or pulse width (PW) to the total period (T) of the waveform.

    50 %
  • Height
    850μm
  • Length
    4mm
  • Width
    4mm
  • Radiation Hardening

    Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.

    No
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    RoHS Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
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SI5351C-B Functional Block Diagram

The following is the Block Diagram of SI5351.

Si5351 Block Diagram.png

Si5351 Block Diagram


The following is the Functional Block Diagram of SI5351C.

Si5351C (20-QFN) Functional Block Diagram.png

Si5351C (20-QFN) Functional Block Diagram


SI5351C-B Equivalent

      Model number                Manufacturer                                                 Description
SI5351C-B-GMRSilicon Laboratories IncProcessor Specific Clock Generator, 160MHz, CMOS, 4 X 4 MM, MO-220VGGD-8, QFN-20


Parts with Similar Specs

The three parts on the right have similar specifications to Silicon Labs & SI5351C-B-GM.

SI5351C-B Applications

● Audio/video equipment, gaming

● Printers, scanners, projectors

● Handheld Instrumentation

● Laser range finder

● Residential gateways

● Networking/communication

● Servers, storage

● XO replacement 


SI5351C-B Package

The following diagram shows the SI5351C-B Package.

20-pin QFN Package Outline.png

20-pin QFN Package Outline


SI5351C-B Package Land Pattern

The following diagram shows the SI5351C-B Package Land Pattern.

20-Pin QFN Land Pattern.png

20-Pin QFN Land Pattern


SI5351C-B Top Marking

The following is the Top Marking of SI5351C-B.

20-Pin QFN Top Marking.png

20-Pin QFN Top Marking


SI5351C-B Manufacturer

Silicon Labs (NASDAQ: SLAB) is a leading provider of silicon, software and system solutions for the Internet of Things, Internet infrastructure, industrial control, consumer and automotive markets. Resolving the electronics industry's toughest problems, providing customers with significant advantages in performance, energy savings, connectivity, and design simplicity. Backed by world-class engineering teams with unsurpassed software and mixed-signal design expertise, Silicon Labs empowers developers with the tools and technologies they need to advance quickly and easily from initial idea to final product.


Datasheet PDF

Download datasheets and manufacturer documentation for Silicon Labs SI5351C-B-GM.
Frequently Asked Questions

How many pins of SI5351C-B-GM?

20 Pins.

What’s the operating temperature of SI5351C-B-GM?

-40°C~85°C.

What is the essential property of the SI5351C-B?

The SI5351C-B is a versatile I²C programmable clock generator that is ideally suited for replacing crystals, crystal oscillators, VCXOs, PLLs, and buffers. The SI5351C-B offers the same flexibility but synchronizes to an external reference clock (CLKIN).

How does SI5351 generate its final output clock?

The SI5351 uses two stages of synthesis to generate its final output clocks. The first stage uses PLLs to multiply the lower frequency input references to a high-frequency intermediate clock. The second stage uses high-resolution MultiSynth fractional dividers to generate the required output frequencies. 
SI5351C-B-GM

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