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Skyworks Solutions Inc. SI5342B-B03367-GM
- Part No.:
- SI5342B-B03367-GM
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SI5342B-B03367-GM.pdf
- Description:
- IC CLK MULTIPLIER ATTENUATOR
- Quantity:
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Inventory:1,391
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Product details
Overview
SI5342B-B03367-GM from Skyworks is a 4-input, 2-output jitter attenuating clock multiplier with fourth-generation DSPLL™ and MultiSynth™ architecture. It delivers ultra-low 90 fs rms jitter, supports input frequencies up to 750 MHz (differential) and output frequencies up to 350 MHz, and meets ITU-T G.8262 EEC Option 1/2 for Synchronous Ethernet. It is used in carrier-grade timing applications such as OTN transponders and SyncE line cards.
For engineers reviewing the SI5342B-B03367-GM datasheet, SI5342B-B03367-GM pinout, SI5342B-B03367-GM application, or SI5342B-B03367-GM equivalent, key selection considerations include its 350 MHz max output frequency limit (B-grade), 44-QFN 7×7 mm package, programmable jitter attenuation bandwidth (0.1 Hz–4 kHz), and support for hitless/ramped/glitchless input switching in telecom timing systems.
Technical Context
The SI5342B-B03367-GM implements a fourth-generation DSPLL with fully integrated loop filter and digitally programmable loop bandwidth (0.1 Hz–4 kHz), enabling precise jitter filtering for SyncE and OTN applications. Its MultiSynth dividers support both integer and fractional synthesis, allowing any-output-frequency generation from any-input-frequency within its specified ranges.
It features automatic/manual input clock switching across four inputs (IN0–IN3), status monitoring (LOS/OOF/LOL), and three operational modes-freerun, locked, and holdover-with programmable holdover averaging over up to 120 seconds of historical frequency data. The device uses an external 25–54 MHz crystal on XA/XB pins for reference stability in freerun/holdover modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 2 independent, configurable clock outputs |
| Max output frequency | 350 MHz - defines upper limit for B-grade variant in SyncE and networking line card designs |
| Jitter (rms) | 90 fs - measured at 12 kHz–20 MHz offset; enables compliance with ITU-T G.8262 EEC Option 1/2 |
| Input frequency range | Differential: 8 kHz–750 MHz; LVCMOS: 8 kHz–250 MHz - supports legacy and high-speed network timing references |
| Jitter attenuation BW | 0.1 Hz–4 kHz - digitally selectable to optimize phase noise suppression for specific application requirements |
| Crystal reference | 25–54 MHz - internal loading capacitors eliminate need for external CL components; 48–54 MHz recommended for best jitter |
| Supply voltages | VDD = 1.8 V ±5%; VDDA = 3.3 V ±5% - dual-rail operation ensures analog PLL core and digital logic stability |
Pinout & Package
The SI5342B-B03367-GM is housed in a 44-pin QFN package measuring 7 mm × 7 mm with 0.5 mm pitch and exposed thermal pad. Pin functions are defined per Skyworks Si5342 Rev D datasheet Section 9 (Pin Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0–IN3 | Differential or LVCMOS clock inputs | Four selectable timing references; IN3 serves as FB_IN in zero-delay mode |
| OUT0, OUT1 | Differential/LVCMOS clock outputs | Two independently configurable outputs supporting LVDS, LVPECL, LVCMOS, CML, HCSL |
| XA, XB | Crytal oscillator terminals | Connects to 25–54 MHz fundamental-mode crystal; internal load caps eliminate external components |
| SDA, SCL | I²C serial interface | Two-wire control bus for configuration and status readback; supports hot-plug programming |
| SCLK, SDIO, CSb | SPI serial interface | Alternative 3-wire+CS control path; compatible with industrial microcontroller peripherals |
| INTRb | Interrupt output | Active-low open-drain flag indicating LOS/OOF/LOL events; enables real-time fault monitoring |
| RSTb | Hardware reset | Asynchronous active-low pin forcing full initialization and NVM reload |
Key Features
| Feature | Design Value |
|---|---|
| Hitless input switching | Enables phase-continuous transitions between fractionally related clocks without output disturbance |
| Programmable holdover | Uses 120-second frequency history window to compute stable holdover frequency after input failure |
| DCO mode | Supports 0.001 ppb step-size frequency tuning via FINC/FDEC pins or register writes |
| Zero-delay mode | Configures IN3 as feedback input to align output phase with selected input clock |
| Status monitoring | Integrated LOS (loss of signal), OOF (out of frequency), LOL (loss of lock) detection with interrupt reporting |
Applications
| OTN Transponders | SyncE Line Cards |
|---|---|
Use Scenario: Timing recovery and distribution in 100G/400G optical transport network transponders requiring sub-100 fs jitter performance. IC Role / Device Role / Timing Role: Jitter attenuator and clock multiplier generating clean, synchronized clocks from recovered line timing or external PRC/SSU references. Use Value: Enables meeting ITU-T G.709 FEC timing budgets and maintaining BER <1e-15 under network stress conditions. | Use Scenario: Clock conditioning in Carrier Ethernet switches and routers compliant with ITU-T G.8262 Synchronous Ethernet standards. IC Role / Device Role / Timing Role: EEC-compliant jitter attenuator providing low-jitter outputs for SERDES, PHY, and packet processing subsystems. Use Value: Achieves EEC Option 1/2 compliance with 90 fs rms jitter and programmable loop bandwidth for wander suppression. |
| Broadcast Video Gear | Test & Measurement Instruments |
Use Scenario: Genlock and frame synchronization in SMPTE ST 2059–2–compliant video routers, converters, and IP media gateways. IC Role / Device Role / Timing Role: Precision clock synthesizer converting GPSDO or atomic reference into multiple video-rate clocks (e.g., 27 MHz, 74.25 MHz, 148.5 MHz). Use Value: Maintains sub-10 ns phase alignment across outputs and supports glitchless format switching during live production. | Use Scenario: Reference clock generation in high-resolution oscilloscopes, bit-error-rate testers, and signal analyzers requiring ultra-low phase noise. IC Role / Device Role / Timing Role: Jitter-cleansing clock source feeding ADC/DAC sampling clocks and FPGA fabric clocks. Use Value: Reduces aperture jitter in 12+ bit ADCs by >50% compared to direct crystal drive, improving ENOB by 1.2 bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar jitter attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5342A-B03367-GM | Same package and pinout; supports full 1028 MHz output range (integer + fractional synthesis) | Required where >350 MHz outputs needed (e.g., 100G KR4 SERDES, PCIe Gen4) | Select when higher-frequency synthesis capability is required; otherwise SI5342B-B03367-GM offers cost-optimized performance for ≤350 MHz SyncE use cases |
| Si5342C-B03367-GM | Same package and pinout; limited to integer-only synthesis (no fractional-N), same 350 MHz max output | Suitable for deterministic, fixed-ratio clock trees where fractional spurs must be avoided | Choose for deterministic jitter spectra and simplified PLL modeling; avoid if arbitrary frequency synthesis (e.g., 156.25 MHz + 125 MHz + 100 MHz simultaneously) is required |
Compared with SI5342A-B03367-GM and SI5342C-B03367-GM, the SI5342B-B03367-GM provides the optimal balance of fractional synthesis flexibility and 350 MHz output capability for cost-sensitive SyncE and OTN timing modules, while avoiding unnecessary complexity or cost of full-bandwidth variants.
Availability
SI5342B-B03367-GM is available at Aetrix Electronics and suitable for OTN transponders, Synchronous Ethernet line cards, and broadcast video infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SI5342B-B03367-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 for communications, automotive, and industrial markets.
The SI5342B-B03367-GM belongs to Skyworks' Si534x family of jitter-attenuating clock multipliers, designed specifically for high-reliability telecom and datacom timing applications demanding G.8262 compliance, ultra-low jitter, and robust holdover performance.
FAQ
What is the maximum output frequency supported by the SI5342B-B03367-GM?
The SI5342B-B03367-GM supports a maximum output frequency of 350 MHz. This B-grade specification distinguishes it from the A-grade (up to 1028 MHz) and reflects its optimization for Synchronous Ethernet and OTN applications where 350 MHz covers common rates like 156.25 MHz, 312.5 MHz, and 322.265625 MHz. The limit is enforced by factory-programmed configuration and cannot be overridden in the field.
Does the SI5342B-B03367-GM support I²C and SPI interfaces?
Yes, the SI5342B-B03367-GM supports both I²C (SDA/SCL pins) and SPI (SCLK/SDIO/CSb pins) serial interfaces for configuration and status monitoring. Either interface can be used independently; no hardware reconfiguration is needed to switch between them. The device boots using configuration stored in on-chip OTP memory, ensuring known-state power-up without host intervention.
How does the SI5342B-B03367-GM achieve ITU-T G.8262 compliance?
The SI5342B-B03367-GM meets ITU-T G.8262 EEC Option 1 and Option 2 requirements through its ultra-low 90 fs rms jitter performance, digitally programmable jitter attenuation bandwidth (0.1 Hz–4 kHz), and robust holdover behavior using up to 120 seconds of frequency history. Its DSPLL architecture suppresses input wander and jitter while maintaining tight phase alignment-verified per G.8262 Annex A test procedures in Skyworks' characterization reports.
What is the role of the XA/XB pins on the SI5342B-B03367-GM?
The XA and XB pins on the SI5342B-B03367-GM connect to a 25–54 MHz fundamental-mode crystal to provide the ultra-low-noise reference for the DSPLL's free-run and holdover modes. Internal loading capacitors eliminate external components. For optimal jitter, Skyworks recommends 48–54 MHz crystals; operation outside this range degrades rms jitter performance beyond the guaranteed 90 fs spec.
Can the SI5342B-B03367-GM perform hitless switching between unrelated input clocks?
No, hitless switching on the SI5342B-B03367-GM requires that input clocks be frequency-locked or fractionally related (e.g., 156.25 MHz and 312.5 MHz). For unrelated clocks (e.g., 10 MHz GPSDO and 125 MHz Ethernet), the device uses glitchless switching with FastLock-assisted pull-in, which avoids output phase discontinuities but introduces controlled transient behavior governed by the DSPLL loop bandwidth setting.
SI5342B-B03367-GM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tray
- 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:
- -
SI5342B-B03367-GM FAQ
1.How can I place an order for SI5342B-B03367-GM through Aetrix?
Please submit a Request for Quotation (RFQ) for SI5342B-B03367-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 SI5342B-B03367-GM reliable?
The price and inventory of SI5342B-B03367-GM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5342B-B03367-GM is usually 5 days.
3.What payment methods are accepted for SI5342B-B03367-GM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5342B-B03367-GM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI5342B-B03367-GM?
SI5342B-B03367-GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI5342B-B03367-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 SI5342B-B03367-GM?
For technical support, including SI5342B-B03367-GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5342B-B03367-GM requirements.
6.How does Aetrix verify that SI5342B-B03367-GM is sourced from the original manufacturer or authorized distributors?
All SI5342B-B03367-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 SI5342B-B03367-GM meets industry standards.
7.What is the process for return or replacement of SI5342B-B03367-GM?
All SI5342B-B03367-GM units undergo pre-shipment inspection (PSI). If there is an issue with SI5342B-B03367-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 SI5342B-B03367-GM part is unused and in its original packaging.
Return procedure for SI5342B-B03367-GM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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