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

Skyworks Solutions Inc. SI5351A-B06886-GTR

Name: SI5351A-B06886-GTR
Brand: Skyworks Solutions Inc.
SKU: SI5351A-B06886-GTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI5351A-B06886-GTR

Manufacturer:: Skyworks Solutions Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: -

Datasheet:: SI5351A-B06886-GTR.pdf

Description:: I2C PROG, ANY FREQUENCY, ANY OUT

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Product details

Overview

SI5351A-B06886-GTR from Skyworks Solutions is an I²C-programmable 8-output CMOS clock generator with integrated VCXO, designed to replace crystals, crystal oscillators, and discrete PLLs in cost-sensitive embedded systems. It delivers up to eight independent frequencies from 2.5 kHz to 200 MHz with 0 ppm synthesis error, supports 1.8/2.5/3.3 V output voltage per bank, and operates from a 25 or 27 MHz fixed-frequency crystal.

For engineers reviewing the SI5351A-B06886-GTR datasheet, SI5351A-B06886-GTR pinout, SI5351A-B06886-GTR application, or SI5351A-B06886-GTR equivalent, this device enables flexible multi-domain clocking in space-constrained designs requiring low-jitter (< 70 ps pk-pk), glitchless frequency changes, and programmable rise/fall times without external filtering.

Technical Context

The SI5351A-B06886-GTR implements a dual-PLL architecture (PLLA + PLLB) with high-resolution MultiSynth fractional dividers per output, enabling independent frequency synthesis on all eight outputs. It accepts only a 25/27 MHz crystal reference - no CLKIN or VC input support - and uses internal load capacitance (0–10 pF selectable) for oscillator stability.

Each output features configurable drive strength, spread spectrum (±0.1% to ±1.5%), static phase offset, and adjustable delay. Core supply is 2.5 V or 3.3 V; output banks (VDDOA–VDDOD) are independently configurable for 1.8/2.5/3.3 V logic compatibility and level translation.

Key Specifications

Parameter	Value and Actual Design Meaning
Outputs	8 independent CMOS clock outputs (CLK0–CLK7)
Frequency Range	2.5 kHz to 200 MHz per output; two unique frequencies >112.5 MHz allowed simultaneously
Frequency Accuracy	0 ppm synthesis error (exact frequency generation via fractional MultiSynth)
Output Jitter	< 70 ps pk-pk period jitter (all outputs active, typical)
Supply Voltages	Core VDD: 2.5 V or 3.3 V; Output banks: 1.8 V, 2.5 V, or 3.3 V (independent per bank)
Crystal Reference	25 MHz or 27 MHz AT-cut crystal only; internal load capacitance (0/6/8/10 pF) eliminates external caps
I²C Interface	Standard/Fast mode (100/400 kbps); supports register configuration and real-time reprogramming

Pinout & Package

SI5351A-B06886-GTR is housed in a 20-pin QFN package (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 eliminates need for external caps
SCL, SDA	I²C serial interface	Configures registers, updates frequencies, enables spread spectrum and output control in-system
OEB	Output enable bar	Active-low global enable; pulls all outputs to high-impedance when asserted
VDD, VDDOA–VDDOD	Power supplies	VDD = core logic (2.5/3.3 V); VDDOA–D = independent output bank supplies (1.8/2.5/3.3 V)
CLK0–CLK7	CMOS clock outputs	Eight fully independent outputs; each supports programmable duty cycle, rise/fall time, and phase offset
GND, EPAD	Ground and thermal pad	EPAD must be soldered to PCB ground plane for thermal performance (θJA = 74.9°C/W)

Key Features

Feature	Design Value
8-output I²C-programmable clock generator	Replaces up to eight discrete oscillators or crystals with single chip, reducing BOM count and board area
0 ppm frequency synthesis error	Enables exact clock matching for audio, video, and networking protocols without trimming or calibration
Independent output voltage rails (VDDOA–VDDOD)	Supports mixed-voltage SoC interfaces (e.g., 1.8 V FPGA core + 3.3 V peripheral bus) without level shifters
Glitchless frequency transitions	Allows dynamic clock rate changes during operation (e.g., CPU DVFS, display refresh rate switching)
Programmable rise/fall time & spread spectrum	Reduces EMI in dense layouts; rise/fall time control (1–1.5 ns typ.) ensures signal integrity across trace lengths

Applications

Audio/Video Timing	Networking Equipment
Use Scenario: Generating precise pixel clocks (74.25 MHz), audio master clocks (24.576 MHz), and HDMI TMDS clocks in AV receivers and set-top boxes. IC Role / Device Role / Timing Role: Primary multi-frequency clock source replacing multiple crystal oscillators and fanout buffers. Use Value: Eliminates timing skew between video and audio domains while supporting HDCP-compliant clock trees.	Use Scenario: Providing synchronized 25 MHz, 125 MHz, and 156.25 MHz clocks to Ethernet PHYs, switches, and packet processors in residential gateways. IC Role / Device Role / Timing Role: Single-chip clock solution for multi-protocol PHY layer timing (IEEE 802.3, 802.11). Use Value: Enables deterministic latency and jitter < 70 ps pk-pk required for Gigabit Ethernet auto-negotiation and PTP synchronization.
Industrial Instrumentation	Laser Rangefinding
Use Scenario: Delivering calibrated 33.333 MHz system clock, 48 MHz ADC sampling clock, and 28.322 MHz DAC update clock in handheld test meters. IC Role / Device Role / Timing Role: Precision clock synthesizer with static phase offset control for coherent multi-channel sampling. Use Value: Ensures sub-nanosecond inter-channel alignment critical for FFT-based spectral analysis accuracy.	Use Scenario: Generating 125 MHz time-of-flight reference clock and 48 MHz microcontroller system clock in compact laser distance sensors. IC Role / Device Role / Timing Role: Low-power, high-stability clock generator operating from single 25 MHz crystal. Use Value: Achieves < 1 mm distance resolution via 125 MHz timing base while maintaining < 15 mW total power consumption.

Audio/Video Timing

Networking Equipment

Use Scenario: Generating precise pixel clocks (74.25 MHz), audio master clocks (24.576 MHz), and HDMI TMDS clocks in AV receivers and set-top boxes.

IC Role / Device Role / Timing Role: Primary multi-frequency clock source replacing multiple crystal oscillators and fanout buffers.

Use Value: Eliminates timing skew between video and audio domains while supporting HDCP-compliant clock trees.

Use Scenario: Providing synchronized 25 MHz, 125 MHz, and 156.25 MHz clocks to Ethernet PHYs, switches, and packet processors in residential gateways.

IC Role / Device Role / Timing Role: Single-chip clock solution for multi-protocol PHY layer timing (IEEE 802.3, 802.11).

Use Value: Enables deterministic latency and jitter < 70 ps pk-pk required for Gigabit Ethernet auto-negotiation and PTP synchronization.

Industrial Instrumentation

Laser Rangefinding

Use Scenario: Delivering calibrated 33.333 MHz system clock, 48 MHz ADC sampling clock, and 28.322 MHz DAC update clock in handheld test meters.

IC Role / Device Role / Timing Role: Precision clock synthesizer with static phase offset control for coherent multi-channel sampling.

Use Value: Ensures sub-nanosecond inter-channel alignment critical for FFT-based spectral analysis accuracy.

Use Scenario: Generating 125 MHz time-of-flight reference clock and 48 MHz microcontroller system clock in compact laser distance sensors.

IC Role / Device Role / Timing Role: Low-power, high-stability clock generator operating from single 25 MHz crystal.

Use Value: Achieves < 1 mm distance resolution via 125 MHz timing base while maintaining < 15 mW total power consumption.

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 tuning capability (0–VDD VC input); same 8-output QFN package and pinout	Required where system-level frequency pulling or phase-locking to external control voltage is needed	Select SI5351A-B06886-GTR when only crystal-referenced free-running clocks are required; use Si5351B-B-GM if VCXO functionality is needed.
Si5351C-B-GM	Accepts external CLKIN (10–100 MHz) in addition to crystal; adds INTR status pin	Suitable for synchronous clock distribution where reference comes from upstream PLL or recovered clock	Choose SI5351A-B06886-GTR for standalone crystal-based timing; select Si5351C-B-GM when synchronizing to an existing system clock domain.

Compared with Si5351B-B-GM and Si5351C-B-GM, SI5351A-B06886-GTR provides identical 8-output flexibility and jitter performance but omits VC and CLKIN inputs - simplifying design, reducing external components, and lowering cost where only crystal-referenced operation is required.

Availability

SI5351A-B06886-GTR is available at Aetrix Electronics and suitable for audio/video equipment, networking gateways, and industrial instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5351A-B06886-GTR 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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and connectivity solutions for wireless infrastructure, automotive, and industrial markets.

The Si5351 family is engineered for cost-sensitive, space-constrained applications needing flexible, software-configurable clock generation - eliminating discrete oscillators and reducing design complexity in consumer, networking, and instrumentation systems.

FAQ

What is the reference clock requirement for SI5351A-B06886-GTR?

The SI5351A-B06886-GTR requires a 25 MHz or 27 MHz fundamental-mode AT-cut crystal connected to XA/XB pins. It does not accept external CLKIN or VC signals. Internal load capacitance (0/6/8/10 pF) is programmable via register 183, eliminating need for external capacitors in most cases.

Does SI5351A-B06886-GTR support spread spectrum clocking?

Yes, SI5351A-B06886-GTR 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 31.5 kHz nominal rate. This reduces EMI peaks in sensitive RF or audio subsystems without affecting timing accuracy.

Can SI5351A-B06886-GTR generate frequencies above 112.5 MHz?

Yes, SI5351A-B06886-GTR supports 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 - e.g., four outputs at 125 MHz and four at 130 MHz.

What are the power supply requirements for SI5351A-B06886-GTR?

SI5351A-B06886-GTR requires a core VDD of 2.5 V or 3.3 V (±10%), and four independent output banks (VDDOA–VDDOD) each configurable for 1.8 V, 2.5 V, or 3.3 V. Power sequencing mandates all VDDOx be powered before or concurrently with VDD to prevent latch-up.

Is SI5351A-B06886-GTR pin-compatible with other Si5351 variants?

Yes, SI5351A-B06886-GTR shares identical 20-pin QFN (4×4 mm) mechanical footprint and pinout with Si5351B-B-GM and Si5351C-B-GM. However, VC and CLKIN pins are unused (NC) in SI5351A-B06886-GTR and must remain unconnected or tied to GND per design guidelines.

SI5351A-B06886-GTR Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

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-B06886-GTR FAQ

1.How can I place an order for SI5351A-B06886-GTR through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5351A-B06886-GTR 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-B06886-GTR reliable?

The price and inventory of SI5351A-B06886-GTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5351A-B06886-GTR is usually 5 days.

3.What payment methods are accepted for SI5351A-B06886-GTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5351A-B06886-GTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5351A-B06886-GTR?

SI5351A-B06886-GTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5351A-B06886-GTR 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-B06886-GTR?

For technical support, including SI5351A-B06886-GTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5351A-B06886-GTR requirements.

6.How does Aetrix verify that SI5351A-B06886-GTR is sourced from the original manufacturer or authorized distributors?

All SI5351A-B06886-GTR 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-B06886-GTR meets industry standards.

7.What is the process for return or replacement of SI5351A-B06886-GTR?

All SI5351A-B06886-GTR units undergo pre-shipment inspection (PSI). If there is an issue with SI5351A-B06886-GTR, 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-B06886-GTR part is unused and in its original packaging.

Return procedure for SI5351A-B06886-GTR:

1.Submit a request within 90 days.

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

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