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Skyworks Solutions Inc. SI5344D-B04028-GM
- Part No.:
- SI5344D-B04028-GM
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SI5344D-B04028-GM.pdf
- Description:
- IC CLK MULTIPLIER ATTENUATOR
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SI5344D-B04028-GM from Skyworks is a 4-input, 4-output jitter attenuating clock multiplier with fourth-generation DSPLL™ and MultiSynth™ architecture. It delivers ultra-low 90 fs rms jitter, supports differential input up to 750 MHz and differential output up to 1028 MHz, and meets ITU-T G.8262 EEC Option 1/2 for Synchronous Ethernet. It is used in carrier-grade 10/40/100G line cards requiring precise, hitless clock switching and holdover stability.
For engineers reviewing the SI5344D-B04028-GM datasheet, SI5344D-B04028-GM pinout, SI5344D-B04028-GM application, or SI5344D-B04028-GM equivalent, key selection considerations include its 44-QFN 7×7 mm package, programmable jitter attenuation bandwidth (0.1 Hz–4 kHz), DCO mode with 0.001 ppb step size, and support for LVDS/LVPECL/LVCMOS/CML/HCSL outputs with independent supply pins.
Technical Context
The SI5344D-B04028-GM implements a digitally controlled DSPLL with fully integrated loop filter and programmable loop bandwidth (0.1 Hz–4 kHz), enabling application-level jitter optimization. Its MultiSynth dividers support both integer and fractional synthesis, allowing any-output-frequency generation from any-input-frequency within specified ranges.
It operates across freerun, locked, holdover, and zero-delay modes, with hitless, ramped, and glitchless input switching capabilities. Status monitoring includes LOS, OOF, and LOL flags, and configuration is stored in on-chip OTP NVM for known-power-up state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Jitter (rms) | 90 fs - Enables compliance with stringent SyncE G.8262 EEC Option 1/2 requirements |
| Input frequency range | Differential: 8 kHz–750 MHz; LVCMOS: 8 kHz–250 MHz - Supports legacy and high-speed network timing references |
| Output frequency range | Differential: 100 Hz–1028 MHz; LVCMOS: 100 Hz–250 MHz - Covers SONET/SDH, Ethernet, and broadcast video rates |
| Jitter attenuation BW | 0.1 Hz–4 kHz - Digitally programmable to optimize phase noise vs. wander trade-off per application |
| Core supply | VDD = 1.8 V ±5%; VDDA = 3.3 V ±5% - Ensures stable PLL core and analog circuit operation |
| Output formats | LVDS, LVPECL, LVCMOS, CML, HCSL - Configurable per-output signal integrity and interface compatibility |
| Temperature range | –40 °C to +85 °C - Validated for industrial and telecom equipment environments |
Pinout & Package
The SI5344D-B04028-GM is housed in a 44-pin QFN package measuring 7 mm × 7 mm with exposed thermal pad. Pin assignments follow the standard Si5344 44-QFN footprint as documented in Skyworks' Rev D datasheet Section 9 (Pin Descriptions) and Section 10.2 (Package Diagram).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0–IN3 | Differential or LVCMOS clock inputs | Four selectable reference inputs; IN3 serves as FB_IN in zero-delay mode |
| OUT0–OUT3 | Programmable differential/LVCMOS outputs | Each independently configurable for format, amplitude, common-mode voltage, and enable control |
| XA/XB | Crytal oscillator terminals | Accepts 25–54 MHz fundamental-mode crystal; internal load caps eliminate external components |
| SCL/SDA or SCLK/MOSI/MISO/CS | I²C or SPI serial interface | Two-wire or four-wire programming interface for register access and NVM configuration |
| INTRb | Interrupt output | Active-low open-drain flag indicating LOS, OOF, or LOL events |
| RSTb | Hardware reset input | Asynchronous active-low reset that reloads NVM defaults and reinitializes all circuits |
Key Features
| Feature | Design Value |
|---|---|
| Any-frequency synthesis | Generates arbitrary output frequencies from any valid input frequency using fractional P/N/R dividers |
| Hitless input switching | Eliminates phase transients when switching between fractionally related clocks (e.g., 155.52 MHz ↔ 622.08 MHz) |
| Programmable holdover | Uses 120-second averaged historical frequency data with user-defined window/delay to minimize phase disturbance during input loss |
| DCO mode | Enables fine frequency tuning with 0.001 ppb resolution via FINC/FDEC pins or register writes |
| Glitchless output reconfiguration | Supports on-the-fly output divider, format, and amplitude changes without clock interruption |
Applications
| OTN Muxponders | Carrier Ethernet Switches |
|---|---|
Use Scenario: Aggregating multiple client-side OTN signals into a single line-side wavelength with strict jitter accumulation limits. IC Role / Device Role / Timing Role: Jitter attenuator and multi-rate clock multiplier providing clean, synchronized clocks for mapping engines and framers. Use Value: 90 fs rms jitter ensures compliance with ITU-T G.783/G.8251 mask requirements at 100G+ line rates. | Use Scenario: Providing traceable, phase-aligned clocks across distributed switch fabric and packet processing units. IC Role / Device Role / Timing Role: Synchronous Ethernet (SyncE) clock generator meeting G.8262 EEC Option 1/2 for master and slave timing distribution. Use Value: Programmable jitter attenuation bandwidth enables optimal wander suppression while maintaining fast lock acquisition. |
| Broadcast Video Equipment | Test & Measurement Instruments |
Use Scenario: Genlock and frame synchronization of SDI/ASI video streams across multi-channel encoders and routers. IC Role / Device Role / Timing Role: Low-jitter clock source and format translator supporting SMPTE ST 2059-2 PTP-derived timing. Use Value: Independent output supply pins (1.8 V/2.5 V/3.3 V) allow direct interface with diverse video PHYs without level-shifting. | Use Scenario: Reference clock conditioning in high-resolution oscilloscopes and bit-error-rate testers where phase noise directly impacts measurement fidelity. IC Role / Device Role / Timing Role: Jitter cleaner and frequency synthesizer generating ultra-stable sampling clocks from noisy system references. Use Value: Fully integrated DSPLL eliminates external loop filter components, reducing layout sensitivity and board-level noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar jitter attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5344A-D-GM | Supports full 0.001–1028 MHz output range with integer+fractional synthesis; SI5344D-B04028-GM limited to ≤350 MHz | Required for 622.08 MHz SONET or 1.028 GHz test equipment outputs | Select Si5344A-D-GM when >350 MHz output frequencies or fractional synthesis flexibility are needed |
| LMK04832ISQE/NOPB | Two-stage PLL architecture; higher typical jitter (110 fs); requires external loop filter components | Lacks integrated crystal oscillator and automatic holdover averaging; less suited for telecom holdover compliance | Choose LMK04832ISQE/NOPB only if TI ecosystem integration or dual-loop flexibility outweighs jitter and footprint advantages |
Compared with SI5344D-B04028-GM, Si5344A-D-GM offers broader frequency coverage but identical pinout and software compatibility, whereas LMK04832ISQE/NOPB trades higher jitter and external component dependency for vendor-specific feature sets like JESD204B support.
Availability
SI5344D-B04028-GM is available at Aetrix Electronics and suitable for 10/40/100G networking line cards, Synchronous Ethernet switches, and broadcast video infrastructure requiring stable component supply and long-term lifecycle assurance.
Supply support for SI5344D-B04028-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 infrastructure, automotive, and industrial markets.
The Si5344D-B04028-GM belongs to Skyworks' Si534x family of jitter-attenuating clock multipliers, designed specifically for telecom and datacom applications demanding G.8262-compliant timing, robust holdover, and flexible multi-rate clock synthesis.
FAQ
What is the maximum differential input frequency supported by the SI5344D-B04028-GM?
The SI5344D-B04028-GM supports differential input frequencies up to 750 MHz, as specified in the Si5345/44/42 Rev D datasheet Section 1. Features List. This enables direct interfacing with high-speed SerDes reference clocks and OC-192/STM-64 line interfaces without external division. The device maintains full jitter attenuation performance across this entire range when configured with appropriate loop bandwidth settings.
Does the SI5344D-B04028-GM require an external crystal, and what is the recommended frequency?
Yes, the SI5344D-B04028-GM requires an external crystal connected to XA/XB pins. The recommended frequency is 48–54 MHz fundamental-mode crystal for optimal jitter performance, though the device accepts 25–54 MHz crystals per datasheet Section 3.5. Internal loading capacitors eliminate need for external CL components, simplifying layout and improving noise immunity.
Can the SI5344D-B04028-GM operate in holdover mode, and how is holdover frequency determined?
Yes, the SI5344D-B04028-GM automatically enters holdover mode upon loss of all valid inputs. Holdover frequency is calculated from up to 120 seconds of stored historical frequency data, using a user-programmable averaging window and delay to exclude corrupted pre-failure samples. This ensures minimal phase disturbance and meets ITU-T G.8262 wander requirements for telecom applications.
What output logic families does the SI5344D-B04028-GM support, and how are they configured?
The SI5344D-B04028-GM supports LVDS, LVPECL, LVCMOS, CML, and HCSL outputs. Each output is independently configurable via registers for format, signal amplitude, common-mode voltage (differential), and drive strength. Configuration is retained in on-chip OTP NVM, ensuring consistent behavior at power-up without host intervention.
Is the SI5344D-B04028-GM pin-compatible with other Si5344 variants such as Si5344A-D-GM?
Yes, the SI5344D-B04028-GM is pin-compatible with all Si5344 variants in the 44-QFN 7×7 mm package, including Si5344A-D-GM, Si5344B-D-GM, and Si5344C-D-GM. Differences are limited to frequency range and synthesis mode (integer-only vs. integer+fractional), which are configured in NVM and do not affect physical layout or basic register map compatibility.
SI5344D-B04028-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:
- -
SI5344D-B04028-GM FAQ
1.How can I place an order for SI5344D-B04028-GM through Aetrix?
Please submit a Request for Quotation (RFQ) for SI5344D-B04028-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 SI5344D-B04028-GM reliable?
The price and inventory of SI5344D-B04028-GM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5344D-B04028-GM is usually 5 days.
3.What payment methods are accepted for SI5344D-B04028-GM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5344D-B04028-GM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI5344D-B04028-GM?
SI5344D-B04028-GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI5344D-B04028-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 SI5344D-B04028-GM?
For technical support, including SI5344D-B04028-GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5344D-B04028-GM requirements.
6.How does Aetrix verify that SI5344D-B04028-GM is sourced from the original manufacturer or authorized distributors?
All SI5344D-B04028-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 SI5344D-B04028-GM meets industry standards.
7.What is the process for return or replacement of SI5344D-B04028-GM?
All SI5344D-B04028-GM units undergo pre-shipment inspection (PSI). If there is an issue with SI5344D-B04028-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 SI5344D-B04028-GM part is unused and in its original packaging.
Return procedure for SI5344D-B04028-GM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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