SI5347 Clock Generator: Features, Pinout and Datasheet
1.8V Clock Generators 64-VFQFN Exposed Pad 64 Terminals Surface Mount 1.71V~3.47V Tray









1.8V Clock Generators 64-VFQFN Exposed Pad 64 Terminals Surface Mount 1.71V~3.47V Tray
The SI5347 is a high-performance, jitter-attenuating clock multiplier which integrates four any-frequency DSPLLs for applications that require maximum integration and independent timing paths. Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

What is CLOCK GENERATOR? What does CLOCK GENERATOR mean? CLOCK GENERATOR meaning & explanation
SI5347 Pinout
The following figure is the diagram of SI5347 Pinout.

Pinout
SI5347 CAD Model
The following figure is the diagram of SI5347 Footprint.

Footprint
SI5347 Description
The SI5347 is a high-performance, jitter-attenuating clock multiplier which integrates four any-frequency DSPLLs for applications that require maximum integration and independent timing paths. Each DSPLL has access to any of the four inputs and can provide low jitter clocks on any of the device outputs. Based on 4th generation DSPLL technology, these devices provide any-frequency conversion with typical jitter performance under 100 fs. Each DSPLL supports independent free-run, holdover modes of operation, as well as automatic and hitless input clock switching. The Si5347 is programmable via a serial interface with in-circuit programmable non-volatile memory so that it always powers up in a known configuration. Programming the Si5347 is easy with Silicon Labs' ClockBuilder Pro™ software. Factory preprogrammed devices are also available.
This article will introduce SI5347 systematically from its features, pinout to its specifications, applications, also including SI5347 datasheet and so much more.
SI5347 Key Features
● Four or two independent DSPLLs, any output frequency from any input frequency
● Ultra-low jitter of 95 fs rms
● Input frequency range:
◆ External Crystal: 25–54 MHz
◆ Differential: 8 kHz to 750 MHz
◆ LVCMOS: 8 kHz to 250 MHz
● Output frequency range:
◆ Differential: 100 Hz to 720 MHz
◆ LVCMOS: 100 Hz to 250 MHz
● Status Monitoring
● Hitless switching
● Si5347: 4 input, 8 output, 64-QFN 9×9 mm
SI5347 Features
● Four or two DSPLLs to synchronize to multiple inputs
● Generates any combination of output frequencies from any input frequency
● Ultra low jitter:
◆ 95 fs typ (12 kHz – 20 MHz)
● Input frequency range:
◆ Differential: 8 kHz to 750 MHz
◆ LVCMOS: 8 kHz to 250 MHz
● Output frequency range:
◆ Differential: up to 720 MHz
◆ LVCMOS: up to 250 MHz
● Flexible crosspoints route any input to any output clock
● Programmable jitter attenuation bandwidth per DSPLL: 0.1 Hz to 4 kHz
● Highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL with programmable signal amplitude
● Status monitoring (LOS, OOF, LOL)
● Hitless input clock switching: automatic or manual
● Locks to gapped clock inputs
● Automatic free-run and holdover modes
● Fastlock feature for low nominal bandwidths
● Glitchless on-the-fly DSPLL frequency changes
● DCO mode: as low as 0.01 ppb steps per DSPLL
● Core voltage:
◆ VDD: 1.8 V ±5%
◆ VDDA: 3.3 V ±5%
● Independent output clock supply pins: 3.3, 2.5, or 1.8 V
● Output-output skew:
◆ Using same DSPLL: 65 ps (Max)
● Serial interface: I2C or SPI
● In-circuit programmable with non-volatile OTP memory
● ClockBuilder Pro software simplifies device configuration
● Si5347: Quad DSPLL, 64-QFN 9×9 mm
● Temperature range: –40 to +85 °C
● Pb-free, RoHS-6 compliant
Specifications
- TypeParameter
- Factory Lead Time6 Weeks
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Surface Mount - 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.
64-VFQFN Exposed Pad - Frequency(Max)350MHz
- 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 - Published1997
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Not For New Designs - 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 Terminations64
- 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 - Additional Feature
Any Feature, including a modified Existing Feature, that is not an Existing Feature.
ALSO REQUIRES 3.3V 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~3.47V - 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 - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
NO LEAD - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
260 - 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.
1.8V - Terminal Pitch
The center distance from one pole to the next.
0.5mm - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
40 - 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.
CML, HCSL, LVCMOS, LVDS, LVPECL - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
S-XQCC-N64 - Qualification Status
An indicator of formal certification of qualifications.
Not Qualified - Number of Circuits1
- uPs/uCs/Peripheral ICs Type
The parameter "uPs/uCs/Peripheral ICs Type" refers to the classification of various integrated circuits used in electronic devices. It encompasses microprocessors (uPs), microcontrollers (uCs), and peripheral integrated circuits that provide additional functionalities. This classification helps in identifying the specific type of chip used for processing tasks, controlling hardware, or interfacing with other components in a system. Understanding this parameter is essential for selecting the appropriate electronic components for a given application.
CLOCK GENERATOR, PROCESSOR SPECIFIC - Supply Current-Max
Supply Current-Max refers to the maximum amount of current that an electronic component or circuit can draw from its power supply under specified operating conditions. It is a critical parameter that determines the power consumption and thermal performance of the device. Exceeding this limit can lead to overheating, potential damage, or failure of the component. Knowing the Supply Current-Max helps in designing circuits that ensure proper operation and reliability.
240mA - 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.
LVCMOS, LVDS, LVPECL, 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.
5:8 - 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.
Yes/Yes - 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 - Length9mm
- Height Seated (Max)
Height Seated (Max) is a parameter in electronic components that refers to the maximum allowable height of the component when it is properly seated or installed on a circuit board or within an enclosure. This specification is crucial for ensuring proper fit and alignment within the overall system design. Exceeding the maximum seated height can lead to mechanical interference, electrical shorts, or other issues that may impact the performance and reliability of the electronic device. Manufacturers provide this information to help designers and engineers select components that will fit within the designated space and function correctly in the intended application.
0.9mm - Width9mm
- RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
RoHS Compliant
SI5347 Functional Block Diagram
The following is the Block Diagram of SI5347.

Si5347 Block Diagram
SI5347 Equivalent
| Model number | Manufacturer | Description |
| SI5347B-A-GM | Silicon Laboratories Inc | Processor Specific Clock Generator, 350MHz, CMOS, 9 X 9 MM, ROHS COMPLIANT, MO-220, QFN-64 |
| SI5347B-A-GMR | Silicon Laboratories Inc | Processor Specific Clock Generator, 350MHz, CMOS, 9 X 9 MM, ROHS COMPLIANT, MO-220, QFN-64 |
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CasePLLInputFrequency (Max)Number of CircuitsRoHS StatusMountHeight Seated (Max)View Compare
SI5347B-B-GM
64-VFQFN Exposed Pad
Yes
LVCMOS, LVDS, LVPECL, Crystal
350MHz
1
Compliant
Surface Mount
0.9 mm
64-VFQFN Exposed Pad
Yes
LVCMOS, LVDS, LVPECL, Crystal
-
1
Compliant
Surface Mount
0.9 mm
44-VFQFN Exposed Pad
Yes
LVCMOS, LVDS, LVPECL, Crystal
350MHz
1
Compliant
Surface Mount
0.9 mm
64-VFQFN Exposed Pad
Yes
LVCMOS, LVDS, LVPECL, Crystal
350MHz
1
Compliant
Surface Mount
0.9 mm
QFN
Yes
Crystal
350 MHz
1
Compliant
Surface Mount
-
SI5347 Applications
● OTN Muxponders and Transponders
● 10/40/100G network line cards
● GbE/10 GbE/100 GbE Synchronous Ethernet (ITU-T G.8262)
● Carrier Ethernet switches
● Broadcast video
SI5347 Package
The following diagrams show the SI5347 Package.

View A

View B
SI5347 PCB Land Pattern
The following diagram shows the SI5347 Package PCB Land Pattern.

PCB Land Pattern
SI5347 Top Marking
The following is the Top Marking of SI5347.

Top Marking
SI5347 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
- Datasheets :
- PCN Other :
- PCN Design/Specification :
How many pins of SI5347B-B-GM?
64 Pins.
What’s the operating temperature of SI5347B-B-GM?
-40°C~85°C.
What is the essential property of the SI5347?
The SI5347 is a high-performance, jitter-attenuating clock multiplier which integrates four any-frequency DSPLLs for applications that require maximum integration and independent timing paths.
Are the differential output drivers supported by Si5347 and Si5346 the same?
The Si5347 supports up to eight differential output drivers and the Si5346 supports four. Each driver has a configurable voltage amplitude and common mode voltage covering a wide variety of differential signal formats including LVPECL, LVDS, HCSL, and CML.
STM32F103R8T6 Microcontroller: 72MHz,64-LQFP, Pinout and Features18 February 20223265
LP5912-3.3DRVT LDO Regulator Pos, 1.8V 0.5A 6-Pin WSON EP T/R and 500mA Low-Noise14 February 20221875
TPS54302DDCR: Synchronous Buck Converter, Pinout25 February 20224876
SX1509 Shifting GPIO: Datasheet, Pinout and Applications18 August 20213792
Exploring the Microchip PIC24F08KL301ESO Microcontroller: A Holistic Analysis29 February 2024135
MOC3052 Photocoupler: Datasheet, Alternatives and Pinout16 August 20217378
LM358AP OPAMP: Pinout, Specification, Datasheet14 August 20245598
LM5117 Wide Input Sync Buck with Current Monitor: Pinout and Datasheet28 September 20222046
Voltage Supervisor ICs: Solutions for IoT, Automotive, and Industrial Applications04 June 2025767
Google Co-releases SayCan Model for Bots to Give Sensible Answers30 August 20223516
Switching Regulator Noise: Comprehensive Understanding and Analysis26 February 20222709
What is Relay?15 November 20217028
Software Tools for NXP Microcontroller Development06 June 20251181
What is a Resistor Used For?01 August 20251544
The Underappreciated iphone - No One Believed Apple CEO Steve Jobs Would Succeed Before01 July 20224450
Will HBM replace DDR and become Computer Memory?09 September 202123311
Silicon Labs
In Stock
United States
China
Canada
Japan
Russia
Germany
United Kingdom
Singapore
Italy
Hong Kong(China)
Taiwan(China)
France
Korea
Mexico
Netherlands
Malaysia
Austria
Spain
Switzerland
Poland
Thailand
Vietnam
India
United Arab Emirates
Afghanistan
Åland Islands
Albania
Algeria
American Samoa
Andorra
Angola
Anguilla
Antigua & Barbuda
Argentina
Armenia
Aruba
Australia
Azerbaijan
Bahamas
Bahrain
Bangladesh
Barbados
Belarus
Belgium
Belize
Benin
Bermuda
Bhutan
Bolivia
Bonaire, Sint Eustatius and Saba
Bosnia & Herzegovina
Botswana
Brazil
British Indian Ocean Territory
British Virgin Islands
Brunei
Bulgaria
Burkina Faso
Burundi
Cabo Verde
Cambodia
Cameroon
Cayman Islands
Central African Republic
Chad
Chile
Christmas Island
Cocos (Keeling) Islands
Colombia
Comoros
Congo
Congo (DRC)
Cook Islands
Costa Rica
Côte d’Ivoire
Croatia
Cuba
Curaçao
Cyprus
Czechia
Denmark
Djibouti
Dominica
Dominican Republic
Ecuador
Egypt
El Salvador
Equatorial Guinea
Eritrea
Estonia
Eswatini
Ethiopia
Falkland Islands
Faroe Islands
Fiji
Finland
French Guiana
French Polynesia
Gabon
Gambia
Georgia
Ghana
Gibraltar
Greece
Greenland
Grenada
Guadeloupe
Guam
Guatemala
Guernsey
Guinea
Guinea-Bissau
Guyana
Haiti
Honduras
Hungary
Iceland
Indonesia
Iran
Iraq
Ireland
Isle of Man
Israel
Jamaica
Jersey
Jordan
Kazakhstan
Kenya
Kiribati
Kosovo
Kuwait
Kyrgyzstan
Laos
Latvia
Lebanon
Lesotho
Liberia
Libya
Liechtenstein
Lithuania
Luxembourg
Macao(China)
Madagascar
Malawi
Maldives
Mali
Malta
Marshall Islands
Martinique
Mauritania
Mauritius
Mayotte
Micronesia
Moldova
Monaco
Mongolia
Montenegro
Montserrat
Morocco
Mozambique
Myanmar
Namibia
Nauru
Nepal
New Caledonia
New Zealand
Nicaragua
Niger
Nigeria
Niue
Norfolk Island
North Korea
North Macedonia
Northern Mariana Islands
Norway
Oman
Pakistan
Palau
Palestinian Authority
Panama
Papua New Guinea
Paraguay
Peru
Philippines
Pitcairn Islands
Portugal
Puerto Rico
Qatar
Réunion
Romania
Rwanda
Samoa
San Marino
São Tomé & Príncipe
Saudi Arabia
Senegal
Serbia
Seychelles
Sierra Leone
Sint Maarten
Slovakia
Slovenia
Solomon Islands
Somalia
South Africa
South Sudan
Sri Lanka
St Helena, Ascension, Tristan da Cunha
St. Barthélemy
St. Kitts & Nevis
St. Lucia
St. Martin
St. Pierre & Miquelon
St. Vincent & Grenadines
Sudan
Suriname
Svalbard & Jan Mayen
Sweden
Syria
Tajikistan
Tanzania
Timor-Leste
Togo
Tokelau
Tonga
Trinidad & Tobago
Tunisia
Turkey
Turkmenistan
Turks & Caicos Islands
Tuvalu
U.S. Outlying Islands
U.S. Virgin Islands
Uganda
Ukraine
Uruguay
Uzbekistan
Vanuatu
Vatican City
Venezuela
Wallis & Futuna
Yemen
Zambia
Zimbabwe


Product
Brand
Articles
Tools
