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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

Skyworks Solutions Inc. SI5351A-B04754-GM

Name: SI5351A-B04754-GM
Brand: Skyworks Solutions Inc.
SKU: SI5351A-B04754-GM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI5351A-B04754-GM

Manufacturer:: Skyworks Solutions Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: -

Datasheet:: SI5351A-B04754-GM.pdf

Description:: I2C PROG, ANY FREQUENCY, ANY OUT

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Product details

Overview

SI5351A-B04754-GM from Skyworks Solutions is an I²C-programmable 8-output CMOS clock generator with integrated crystal oscillator, supporting free-running frequency synthesis from 2.5 kHz to 200 MHz per output with 0 ppm error, low period jitter (<70 ps pk-pk), and independent 1.8/2.5/3.3 V output supply rails - deployed in networking equipment, audio/video systems, and residential gateways.

For engineers reviewing the SI5351A-B04754-GM datasheet, SI5351A-B04754-GM pinout, SI5351A-B04754-GM application, or SI5351A-B04754-GM equivalent, key selection criteria include its 20-QFN-20 package, VCXO-free Si5351A variant identity, 8-output capability, 25/27 MHz crystal reference requirement, and I²C-configurable spread spectrum and phase offset.

Technical Context

The SI5351A-B04754-GM implements a dual-PLL architecture with PLL A only (no VCXO or CLKIN support), using a fixed 25 or 27 MHz crystal input to drive eight independent MultiSynth fractional dividers. It lacks PLL B and VC control circuitry, distinguishing it from Si5351B/C variants.

All eight outputs are synthesized from a single crystal-referenced PLL, enabling non-integer-related frequencies up to 200 MHz with static phase offset control, glitchless frequency changes, and programmable rise/fall times - but limited to two unique frequencies above 112.5 MHz simultaneously.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count	8 independent CMOS clock outputs
Frequency range	2.5 kHz to 200 MHz per output; only two unique >112.5 MHz frequencies allowed concurrently
Reference input	25 or 27 MHz fundamental-mode AT-cut crystal only (no CLKIN or VC support)
Period jitter	<70 ps pk-pk (all outputs active, 20-QFN package)
Supply rails	Core VDD: 2.5 V or 3.3 V; independent VDDOx: 1.8/2.5/3.3 V per output group
I²C interface	Standard/Fast Mode (100/400 kbps); supports register-based configuration and real-time reprogramming
Spread spectrum	Configurable down-spread (–0.1% to –2.5%) or center-spread (±0.1% to ±1.5%) per output

Pinout & Package

SI5351A-B04754-GM is housed in a 20-pin QFN (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions align with the Si5351A 20-pin QFN variant as defined in Skyworks Document Si5351A/B/C-B Rev. 1.3, Section 10.1.

Pin/Terminal	Circuit Role	Design Meaning
XA, XB	Crystal oscillator input	Connects to 25 or 27 MHz AT-cut crystal; internal load capacitance selectable (0/6/8/10 pF)
SCL, SDA	I²C serial interface	Two-wire bus for configuration; supports standard/fast mode; requires external pull-ups
OEB	Output enable bar	Active-low global output disable; high-Z state when asserted
VDD, VDDOA–VDDOD	Power supply rails	VDD = core logic (2.5/3.3 V); VDDOA–D = four independent output groups (1.8/2.5/3.3 V each)
CLK0–CLK7	CMOS clock outputs	Eight configurable outputs; each supports independent frequency, duty cycle, spread spectrum, and phase offset
GND, EPAD	Ground and thermal pad	EPAD must be soldered to PCB ground plane for thermal and electrical integrity

Key Features

Feature	Design Value
8-output any-frequency synthesis	Generates up to eight independent, non-integer-related clocks from one crystal - eliminates multiple discrete oscillators
0 ppm frequency error	Exact fractional synthesis ensures no accumulated timing drift across outputs or temperature
Per-output spread spectrum	Reduces EMI at individual clock domains without affecting other outputs or requiring system-level redesign
Independent output voltage rails	Four VDDO groups allow mixed-voltage system interfacing (e.g., 1.8 V FPGA + 3.3 V MCU on same device)
Glitchless frequency switching	Enables dynamic clock rate adaptation in real-time applications (e.g., video frame rate changes) without signal interruption

Applications

Audio/Video Equipment	Networking Equipment
Use Scenario: Generating synchronized pixel clock (74.25 MHz), audio master clock (24.576 MHz), and HDMI TMDS clock (165 MHz) in a media processor board. IC Role / Device Role / Timing Role: Single-chip multi-domain clock source replacing three discrete oscillators and a fanout buffer. Use Value: Reduces BOM count by 4 components, eliminates inter-clock skew, and enables per-output spread spectrum for HDMI EMI compliance.	Use Scenario: Providing reference clocks for Ethernet PHY (25 MHz), PCIe Gen1 (100 MHz), and USB 2.0 (48 MHz) in a residential gateway. IC Role / Device Role / Timing Role: Centralized clock generator delivering isolated, jitter-clean clocks to mixed-speed interfaces. Use Value: Eliminates need for separate XO/VCXO parts; supports simultaneous 25/48/100 MHz outputs with <70 ps jitter meeting PCIe Gen1 spec.
Laser Range Finder	Handheld Instrumentation
Use Scenario: Driving time-of-flight measurement circuitry requiring precise 125 MHz sampling clock and 33.333 MHz system clock. IC Role / Device Role / Timing Role: Low-jitter, battery-optimized clock source with programmable output drive strength. Use Value: Achieves sub-nanosecond timing resolution; independent VDDO allows 1.8 V logic interface while maintaining 3.3 V analog clock swing.	Use Scenario: Supplying 74.25 MHz video DAC clock, 27 MHz display controller clock, and 48 MHz microcontroller clock in portable test equipment. IC Role / Device Role / Timing Role: Configurable, low-power clock hub supporting rapid firmware-driven clock reconfiguration. Use Value: Enables field-upgradable timing profiles via I²C; <45 mA total supply current at 3.3 V supports extended battery life.

Audio/Video Equipment

Networking Equipment

Use Scenario: Generating synchronized pixel clock (74.25 MHz), audio master clock (24.576 MHz), and HDMI TMDS clock (165 MHz) in a media processor board.

IC Role / Device Role / Timing Role: Single-chip multi-domain clock source replacing three discrete oscillators and a fanout buffer.

Use Value: Reduces BOM count by 4 components, eliminates inter-clock skew, and enables per-output spread spectrum for HDMI EMI compliance.

Use Scenario: Providing reference clocks for Ethernet PHY (25 MHz), PCIe Gen1 (100 MHz), and USB 2.0 (48 MHz) in a residential gateway.

IC Role / Device Role / Timing Role: Centralized clock generator delivering isolated, jitter-clean clocks to mixed-speed interfaces.

Use Value: Eliminates need for separate XO/VCXO parts; supports simultaneous 25/48/100 MHz outputs with <70 ps jitter meeting PCIe Gen1 spec.

Laser Range Finder

Handheld Instrumentation

Use Scenario: Driving time-of-flight measurement circuitry requiring precise 125 MHz sampling clock and 33.333 MHz system clock.

IC Role / Device Role / Timing Role: Low-jitter, battery-optimized clock source with programmable output drive strength.

Use Value: Achieves sub-nanosecond timing resolution; independent VDDO allows 1.8 V logic interface while maintaining 3.3 V analog clock swing.

Use Scenario: Supplying 74.25 MHz video DAC clock, 27 MHz display controller clock, and 48 MHz microcontroller clock in portable test equipment.

IC Role / Device Role / Timing Role: Configurable, low-power clock hub supporting rapid firmware-driven clock reconfiguration.

Use Value: Enables field-upgradable timing profiles via I²C; <45 mA total supply current at 3.3 V supports extended battery life.

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5351A-B-GM	Same Si5351A variant, identical 20-QFN-20 package and 8-output capability; differs only in factory programming (blank vs. preprogrammed)	No functional difference; SI5351A-B04754-GM includes custom ClockBuilder Pro configuration stored in on-chip EEPROM	Select SI5351A-B04754-GM when factory-loaded timing profile is required; choose Si5351A-B-GM for full runtime I²C reconfiguration flexibility
Si5351C-B-GM	Supports external CLKIN reference (10–100 MHz) and dual-PLL architecture; adds synchronization capability absent in SI5351A-B04754-GM	Required where system-level clock synchronization (e.g., to GPS-disciplined reference) is needed; not suitable as drop-in replacement	Choose Si5351C-B-GM only if external reference locking is mandatory; SI5351A-B04754-GM is optimal for crystal-only, cost-sensitive free-running designs

Compared with Si5351A-B-GM, SI5351A-B04754-GM delivers immediate out-of-box operation with preloaded timing configuration, while Si5351C-B-GM introduces synchronization capability at the cost of added complexity and incompatibility with crystal-only use cases.

Availability

SI5351A-B04754-GM is available at Aetrix Electronics and suitable for networking equipment, audio/video systems, and handheld instrumentation requiring stable component supply, factory-programmed timing configurations, and long-term production continuity.

Supply support for SI5351A-B04754-GM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and power management ICs.

The Si5351 family is designed as a highly flexible, low-cost replacement for crystals, crystal oscillators, and fanout buffers in cost-sensitive consumer, industrial, and communications applications - emphasizing configurability, integration, and jitter performance.

FAQ

What is the reference clock requirement for SI5351A-B04754-GM?

The SI5351A-B04754-GM requires a 25 MHz or 27 MHz fundamental-mode AT-cut crystal connected to XA/XB pins. It does not support external CLKIN or VCXO tuning. Internal load capacitance is configurable (0/6/8/10 pF), and crystals with 12 pF load requirements may need ≤2 pF external capacitors. This matches the Si5351A variant specification in Skyworks Si5351A/B/C-B Rev. 1.3.

Does SI5351A-B04754-GM support spread spectrum clocking?

Yes, SI5351A-B04754-GM supports per-output spread spectrum clocking with selectable down-spread (–0.1% to –2.5%) or center-spread (±0.1% to ±1.5%) modulation at 30–33 kHz. This feature is enabled via I²C register configuration and reduces electromagnetic interference without affecting timing accuracy of other outputs.

What package type is used for SI5351A-B04754-GM?

SI5351A-B04754-GM uses a 20-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. This matches the Si5351A 20-QFN variant defined in Skyworks documentation and supports all eight outputs, unlike the 16-QFN (4 outputs) or 10-MSOP (3 outputs) alternatives.

Can SI5351A-B04754-GM generate frequencies above 112.5 MHz?

Yes, SI5351A-B04754-GM can generate frequencies up to 200 MHz, but only two unique frequencies above 112.5 MHz may be active simultaneously (e.g., 125 MHz and 130 MHz). Multiple outputs may replicate the same high-frequency signal, but distinct values above 112.5 MHz are restricted to two per device.

How many independent voltage supplies does SI5351A-B04754-GM support?

SI5351A-B04754-GM supports five independent voltage supplies: one core VDD rail (2.5 V or 3.3 V) and four output-group VDDO rails (VDDOA–VDDOD), each configurable for 1.8 V, 2.5 V, or 3.3 V. This enables mixed-voltage interface support across its eight CMOS outputs without level-shifting components.

SI5351A-B04754-GM Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: *

Package/Case:: -

Packaging:: Strip

Product Status:: Active

Programmable:: Not Verified

Type:: -

PLL:: -

Input:: -

Output:: -

Number of Circuits:: -

Ratio - Input:Output:: -

Differential - Input:Output:: -

Frequency - Max:: -

Divider/Multiplier:: -

Voltage - Supply:: -

Operating Temperature:: -

Mounting Type:: -

Grade:: -

Qualification:: -

Supplier Device Package:: -

SI5351A-B04754-GM FAQ

1.How can I place an order for SI5351A-B04754-GM through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5351A-B04754-GM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SI5351A-B04754-GM reliable?

The price and inventory of SI5351A-B04754-GM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5351A-B04754-GM is usually 5 days.

3.What payment methods are accepted for SI5351A-B04754-GM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5351A-B04754-GM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5351A-B04754-GM?

SI5351A-B04754-GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5351A-B04754-GM order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SI5351A-B04754-GM?

For technical support, including SI5351A-B04754-GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5351A-B04754-GM requirements.

6.How does Aetrix verify that SI5351A-B04754-GM is sourced from the original manufacturer or authorized distributors?

All SI5351A-B04754-GM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI5351A-B04754-GM meets industry standards.

7.What is the process for return or replacement of SI5351A-B04754-GM?

All SI5351A-B04754-GM units undergo pre-shipment inspection (PSI). If there is an issue with SI5351A-B04754-GM, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SI5351A-B04754-GM part is unused and in its original packaging.

Return procedure for SI5351A-B04754-GM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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