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

Skyworks Solutions Inc. SI5351A-B04364-GM

Name: SI5351A-B04364-GM
Brand: Skyworks Solutions Inc.
SKU: SI5351A-B04364-GM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI5351A-B04364-GM

Manufacturer:: Skyworks Solutions Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: -

Datasheet:: SI5351A-B04364-GM.pdf

Description:: IC CLOCK GENERATOR

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Product details

Overview

SI5351A-B04364-GM from Skyworks Solutions is an I²C-programmable, 8-output CMOS clock generator with integrated crystal oscillator (no external VCXO), supporting frequencies from 2.5 kHz to 200 MHz per output, 0 ppm synthesis error, and independent 1.8/2.5/3.3 V output supply rails - used in residential gateways and networking equipment for multi-domain clock synthesis.

For engineers reviewing the SI5351A-B04364-GM datasheet, SI5351A-B04364-GM pinout, SI5351A-B04364-GM application, or SI5351A-B04364-GM equivalent, key selection criteria include its 20-QFN package, 8-output capability, absence of VCXO tuning (Si5351A variant), crystal-only reference (25/27 MHz), and I²C-configurable spread spectrum per output.

Technical Context

The SI5351A-B04364-GM implements a dual-PLL architecture with two high-resolution MultiSynth fractional dividers per PLL, enabling independent frequency synthesis on all eight outputs. It accepts only a 25 or 27 MHz crystal (XA/XB) - no CLKIN or VC input support - and lacks VCXO functionality, distinguishing it from Si5351B/C variants.

Each output features programmable rise/fall time, static phase offset, glitchless frequency switching, and configurable spread spectrum (±0.1% to ±1.5% center-spread or –0.1% to –2.5% down-spread at 31.5 kHz modulation rate), with output drive strength set to default 50 Ω impedance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count	8 independent CMOS clock outputs (CLK0–CLK7)
Frequency range	2.5 kHz to 200 MHz per output; max two unique frequencies >112.5 MHz simultaneously
Reference input	25 or 27 MHz AT-cut crystal only (no CLKIN or VC support)
Period jitter	< 70 ps pk-pk (typical, all 8 outputs active, 20-QFN)
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 A0 address pin for multi-device bus
Power consumption	27–45 mA total (8 outputs enabled, VDD = 2.5/3.3 V)

Pinout & Package

SI5351A-B04364-GM is housed in a 20-pin QFN (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Si5351A 20-pin QFN specification (Rev. 1.3, Section 10.1).

Pin/Terminal	Circuit Role	Design Meaning
XA, XB	Crystal oscillator inputs	Connect 25/27 MHz AT-cut crystal; internal load capacitance selectable (0/6/8/10 pF)
SCL, SDA, A0	I²C control interface	SCL/SDA for configuration; A0 sets LSB of I²C address (0x60 or 0x61)
OEB	Output enable bar	Active-low global output disable; open-drain, requires pull-up
VDD, VDDOA–VDDOD	Power supply rails	VDD = core logic; VDDOA–D power four output groups (CLK0/1, CLK2/3, CLK4/5, CLK6/7)
CLK0–CLK7	Differential-capable CMOS outputs	Single-ended CMOS outputs; support HCSL-compatible swing with proper termination
GND, EPAD	Ground and thermal pad	EPAD must be soldered to PCB ground plane for thermal and electrical integrity

Key Features

Feature	Design Value
Any-frequency synthesis	Generates exact frequencies up to 200 MHz per output with zero ppm error via fractional MultiSynth dividers
Independent output voltage control	Four VDDO rails allow mixed-voltage system interfacing (e.g., 1.8 V MCU + 3.3 V PHY clocks)
Per-output spread spectrum	Reduces EMI by enabling selectable center/down-spread on each CLKn independently
Glitchless reprogramming	Frequency, phase, and duty cycle changes occur without output interruption or metastability
Low-jitter operation	40–70 ps pk-pk period jitter enables timing-critical applications like PCIe Gen 1 and audio sampling clocks

Applications

Networking Switches	Audio/Video Equipment
Use Scenario: Generating synchronized 25 MHz Ethernet PHY clocks and 125 MHz switch fabric clocks from a single 27 MHz crystal. IC Role / Device Role / Timing Role: Replaces multiple discrete oscillators and fanout buffers with one programmable clock source. Use Value: Reduces BOM count and board space while eliminating inter-clock skew between domains.	Use Scenario: Providing 48 MHz USB audio clock, 24.576 MHz I²S master clock, and 74.25 MHz HDMI TMDS clock in a home theater receiver. IC Role / Device Role / Timing Role: Multi-domain clock synthesizer delivering jitter-clean, phase-aligned clocks for mixed-signal subsystems. Use Value: Enables precise sample-rate conversion and low-audio-noise performance without external PLLs.
Residential Gateways	Laser Range Finders
Use Scenario: Supplying 33.333 MHz DOCSIS upstream clock, 28.322 MHz Wi-Fi baseband clock, and 48 MHz CPU clock from one 25 MHz crystal. IC Role / Device Role / Timing Role: Single-chip clock solution for multi-standard broadband gateway SoCs. Use Value: Eliminates crystal inventory complexity and improves time-to-market for carrier-certified designs.	Use Scenario: Delivering 125 MHz time-of-flight measurement clock and 22.5792 MHz ADC sampling clock with matched phase delay in portable laser distance meters. IC Role / Device Role / Timing Role: Low-jitter, phase-controllable clock generator for precision analog-digital timing alignment. Use Value: Improves distance measurement resolution by minimizing clock-induced timing uncertainty.

Networking Switches

Audio/Video Equipment

Use Scenario: Generating synchronized 25 MHz Ethernet PHY clocks and 125 MHz switch fabric clocks from a single 27 MHz crystal.

IC Role / Device Role / Timing Role: Replaces multiple discrete oscillators and fanout buffers with one programmable clock source.

Use Value: Reduces BOM count and board space while eliminating inter-clock skew between domains.

Use Scenario: Providing 48 MHz USB audio clock, 24.576 MHz I²S master clock, and 74.25 MHz HDMI TMDS clock in a home theater receiver.

IC Role / Device Role / Timing Role: Multi-domain clock synthesizer delivering jitter-clean, phase-aligned clocks for mixed-signal subsystems.

Use Value: Enables precise sample-rate conversion and low-audio-noise performance without external PLLs.

Residential Gateways

Laser Range Finders

Use Scenario: Supplying 33.333 MHz DOCSIS upstream clock, 28.322 MHz Wi-Fi baseband clock, and 48 MHz CPU clock from one 25 MHz crystal.

IC Role / Device Role / Timing Role: Single-chip clock solution for multi-standard broadband gateway SoCs.

Use Value: Eliminates crystal inventory complexity and improves time-to-market for carrier-certified designs.

Use Scenario: Delivering 125 MHz time-of-flight measurement clock and 22.5792 MHz ADC sampling clock with matched phase delay in portable laser distance meters.

IC Role / Device Role / Timing Role: Low-jitter, phase-controllable clock generator for precision analog-digital timing alignment.

Use Value: Improves distance measurement resolution by minimizing clock-induced timing uncertainty.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5351B-B-GM	Includes VCXO with 0–VDD VC input and ±30 to ±240 ppm pull range; same 8-output 20-QFN package	Required where system-level frequency pulling (e.g., IEEE 1588 PTP servo) or jitter reduction via VCXO loop is needed	Select SI5351A-B04364-GM when only fixed-frequency crystal reference suffices; choose Si5351B-B-GM if voltage-controlled tuning is mandatory
Si5350A-B-GM	Pin-programmable (not I²C); factory preprogrammed only; identical 8-output 20-QFN footprint and crystal interface	Suitable for high-volume, unchanging clock plans where field reconfiguration is unnecessary	Choose SI5351A-B04364-GM for design flexibility and runtime reprogramming; select Si5350A-B-GM for cost-sensitive, static-clock applications

Compared with Si5351B-B-GM, SI5351A-B04364-GM omits VCXO control but simplifies layout and reduces external component count; versus Si5350A-B-GM, it trades factory-only programming for full I²C configurability - making it optimal for prototyping and multi-configurable platforms.

Availability

SI5351A-B04364-GM is available at Aetrix Electronics and suitable for residential gateways, networking switches, and audio/video equipment requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for SI5351A-B04364-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 timing, RF, and infrastructure components.

The Si5351 family was designed to replace crystals, crystal oscillators, VCXOs, and PLL-based clock trees in cost- and space-constrained embedded systems - emphasizing configurability, low jitter, and multi-output integration.

FAQ

What is the reference clock requirement for SI5351A-B04364-GM?

The SI5351A-B04364-GM requires a 25 MHz or 27 MHz fundamental-mode AT-cut crystal connected to XA and XB pins. It does not accept external CLKIN or VC signals - this is a defining trait of the Si5351A variant. Internal load capacitance (0/6/8/10 pF) can be configured via register 183 to match crystal specifications, eliminating need for external capacitors in most cases.

Does SI5351A-B04364-GM support spread spectrum clocking?

Yes, SI5351A-B04364-GM supports per-output spread spectrum clocking with selectable center-spread (±0.1% to ±1.5%) or down-spread (–0.1% to –2.5%) modes modulated at 31.5 kHz. This feature is configured independently for each CLK0–CLK7 output via I²C registers and reduces electromagnetic interference without affecting functional timing margins.

Can SI5351A-B04364-GM generate frequencies above 112.5 MHz?

Yes, SI5351A-B04364-GM can generate frequencies up to 200 MHz on any output, but only two *unique* frequencies above 112.5 MHz may be active simultaneously (e.g., 125 MHz and 130 MHz). Duplicate frequencies (e.g., 125 MHz on four outputs) are permitted. This limitation arises from internal PLL resource allocation and is documented in Table 7 of the datasheet.

What are the power supply requirements for SI5351A-B04364-GM?

SI5351A-B04364-GM requires a core VDD supply of 2.5 V ±10% or 3.3 V ±10%, and four independent VDDO rails (VDDOA–D) each configurable for 1.8 V, 2.5 V, or 3.3 V to match connected ICs. Power sequencing mandates that all VDDO supplies be powered before or concurrently with VDD to prevent latch-up or undefined behavior during startup.

Is SI5351A-B04364-GM pin-compatible with other Si5351 variants?

Yes, SI5351A-B04364-GM in the 20-QFN package shares identical pinout and footprint with Si5351B-B-GM and Si5351C-B-GM. However, functional differences exist: SI5351A lacks VC and CLKIN pins (internally unconnected), so those pins must remain unconnected or tied to GND per datasheet guidance. No PCB change is needed for mechanical replacement, but firmware and schematic must reflect missing VCXO/CLKIN functionality.

SI5351A-B04364-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-B04364-GM FAQ

1.How can I place an order for SI5351A-B04364-GM through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5351A-B04364-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-B04364-GM reliable?

The price and inventory of SI5351A-B04364-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-B04364-GM is usually 5 days.

3.What payment methods are accepted for SI5351A-B04364-GM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5351A-B04364-GM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5351A-B04364-GM?

SI5351A-B04364-GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5351A-B04364-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-B04364-GM?

For technical support, including SI5351A-B04364-GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5351A-B04364-GM requirements.

6.How does Aetrix verify that SI5351A-B04364-GM is sourced from the original manufacturer or authorized distributors?

All SI5351A-B04364-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-B04364-GM meets industry standards.

7.What is the process for return or replacement of SI5351A-B04364-GM?

All SI5351A-B04364-GM units undergo pre-shipment inspection (PSI). If there is an issue with SI5351A-B04364-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-B04364-GM part is unused and in its original packaging.

Return procedure for SI5351A-B04364-GM:

1.Submit a request within 90 days.

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

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