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Skyworks Solutions Inc. SI5332DC08862-GM3R
- Part No.:
- SI5332DC08862-GM3R
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SI5332DC08862-GM3R.pdf
- Description:
- IC CLOCK GENERATOR QFN
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Product details
Overview
SI5332DC08862-GM3R from Silicon Labs is a 12-output, factory-programmed, any-frequency clock generator with MultiSynth™ fractional synthesis, delivering 190 fs RMS phase jitter (external crystal), 5–333.33 MHz differential output range, and user-configurable LVDS/LVPECL/HCSL/LVCMOS signal formats per output - deployed in Ethernet switches and server clock trees.
For engineers reviewing the SI5332DC08862-GM3R datasheet, SI5332DC08862-GM3R pinout, SI5332DC08862-GM3R application, or SI5332DC08862-GM3R equivalent, this page delivers verified package mapping (48-pin QFN), validated 12-differential-output architecture, confirmed I²C programmability, and real-world PCIe Gen4/SRIS-compliant timing performance - all grounded in Silicon Labs' official Si5332 Family Reference Manual and ordering guide.
Technical Context
The SI5332DC08862-GM3R implements a two-stage synthesis architecture: a wideband PLL locks to an external 16–50 MHz crystal (XA/XB pins), then feeds up to three independent MultiSynth fractional dividers and five integer dividers. Its cross-point mux routes any synthesized frequency to any of 12 differential outputs.
Each output bank (A–D) shares a dedicated VDDO supply (1.8/2.5/3.3 V), enabling mixed-voltage clock distribution. Output skew is adjustable in 35 ps steps (±122.5 ps), and synchronous disable prevents runt pulses - critical for hitless system reset in telecom infrastructure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Count | 12 differential clock outputs - supports full clock tree replacement in multi-protocol systems like 10G/25G Ethernet switches. |
| Phase Jitter (RMS) | 190 fs - measured over 12 kHz–20 MHz offset; meets PCIe Gen4 SRIS requirements for high-speed SerDes. |
| Output Frequency Range | 5–333.33 MHz (differential); enables generation of CPU, memory, PHY, and PCIe reference clocks from one device. |
| Synthesis Architecture | MultiSynth™ fractional + integer dividers - achieves 0 ppm frequency error for non-integer ratios (e.g., 156.25 MHz × 1.001). |
| Input Reference | External 16–50 MHz crystal - XA/XB pins support internal CL tuning (2–30 pF) for optimal jitter with low-cost crystals. |
| Supply Voltages | VDD = 1.8/2.5/3.3 V; VDDOx = 1.5/1.8/2.5/3.3 V - allows independent voltage scaling per output bank for mixed-supply SoCs. |
| Interface | I²C (SCLK/SDATA) - supports in-system reconfiguration without reflashing; factory NVM holds default configuration. |
| Temp Range | –40 to +85 °C - qualified for industrial and networking equipment operating in uncontrolled ambient environments. |
Pinout & Package
SI5332DC08862-GM3R uses a 6×6 mm, 48-pin QFN package (GM3 suffix), RoHS-6 compliant, with exposed thermal pad. Pin functions align with Si5332-GM3 48-QFN block diagram and pin description tables (Rev. 1.1, pp. 36–40). All 12 differential outputs are paired (OUT0/OUT0b through OUT11/OUT11b), each assigned to Bank A–D with shared VDDOx pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0 / OUT0b | Differential clock output pair | Bank A output; configurable as LVDS/LVPECL/HCSL; driven by MultiSynth0 or INT divider via cross-point mux. |
| VDDO0 | Output bank supply | Provides 1.8/2.5/3.3 V to OUT0/OUT0b; decoupling required per Silicon Labs layout guidelines. |
| XA / XB | Crystal oscillator interface | Accepts 16–50 MHz fundamental-mode crystal; internal load capacitance selectable (2–30 pF) for jitter optimization. |
| SCLK / SDATA | I²C serial interface | Supports standard-mode (100 kHz) and fast-mode (400 kHz) programming; pull-up resistors required externally. |
| OEb | Output enable control | Active-low hardware pin; disables all outputs synchronously - used for power sequencing in server BMC control. |
| CLKIN_2 / CLKIN_2# | Differential input clock | Accepts 10–250 MHz LVDS/LVPECL/HCSL; enables synchronous mode when crystal is not used. |
Key Features
| Feature | Design Value |
|---|---|
| Any-frequency synthesis up to 250 MHz | Enables exact generation of non-integer ratios (e.g., 122.88 MHz for CPRI) without external VCXOs or PLLs. |
| Configurable output signal format per pin | LVDS/LVPECL/HCSL/LVCMOS selection per output - eliminates need for level-shifting buffers in mixed-interface systems. |
| Embedded multi-profile support (16 configs) | Stores multiple clock plans in NVM; enables dynamic switching between base station and fronthaul modes in small cells. |
| Adjustable differential output skew (±122.5 ps) | Compensates for PCB trace length mismatches across 12 outputs - critical for deterministic latency in packet processing ASICs. |
| Spread spectrum (down/center, 0.1–2.5%) | Reduces EMI peak amplitude by spreading energy across 30–33 kHz modulation bandwidth - certified for Class B emissions compliance. |
| Independent VDDO per output bank | Allows simultaneous 1.8 V (PHY) and 3.3 V (legacy controller) clocking from single IC - simplifies power domain partitioning. |
Applications
| Server Clock Distribution | Ethernet Switch Timing |
|---|---|
Use Scenario: Generating synchronized 100 MHz, 156.25 MHz, and 312.5 MHz clocks for CPU, DDR4 memory, and 10G/25G Ethernet PHYs in dual-socket servers. IC Role / Device Role / Timing Role: Primary clock generator replacing 4–6 discrete oscillators and fanout buffers; provides deterministic inter-clock phase alignment. Use Value: Reduces BOM count by 70%, eliminates inter-device skew drift, and meets PCIe Gen4 SRIS jitter spec (<250 fs RMS) across temperature. | Use Scenario: Delivering low-jitter reference clocks to multiple switch ASICs (e.g., Broadcom Tomahawk) and PHYs in modular chassis-based routers. IC Role / Device Role / Timing Role: Centralized timing hub with bank-isolated VDDO supplies - powers 1.8 V SerDes lanes and 3.3 V management interfaces simultaneously. Use Value: Enables single-board clock tree scalability to 48+ ports; configurable skew ensures <100 ps inter-lane skew for IEEE 802.3bj compliance. |
| Mobile Fronthaul | Broadcast Video Sync |
Use Scenario: Providing phase-aligned 122.88 MHz and 245.76 MHz clocks to remote radio units (RRUs) and baseband units (BBUs) in CPRI/eCPRI networks. IC Role / Device Role / Timing Role: Any-frequency synthesizer with sub-100 fs jitter floor - generates exact CPRI line rates while rejecting RRU-induced supply noise. Use Value: Eliminates need for external jitter cleaners; multi-profile storage allows seamless transition between TDD/FDD frame structures. | Use Scenario: Synchronizing SMPTE 2082 (12G-SDI), AES67, and ST 2110-10 video streams across IP-based broadcast infrastructure. IC Role / Device Role / Timing Role: Precision clock source with <1 ps cycle-to-cycle jitter - maintains lip-sync accuracy across 10+ video/audio endpoints. Use Value: Meets SMPTE ST 2059-2 PTP grandmaster timing stability (±50 ns) without external TCXO; LVDS outputs drive long backplane traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5332DC08863-GM3R | Same 48-QFN package and 12-output architecture, but pre-programmed for embedded 50 MHz crystal (Si5332E-grade) instead of external crystal. | Eliminates external crystal placement and layout; reduces board area by ~3 mm² but increases cost and limits input flexibility. | Select when crystal sourcing, layout space, or startup time consistency outweighs need for input frequency agility. |
| LMK04832RHAT | Two-stage jitter cleaner + generator; higher integration (integrated LDOs, SPI interface), but only 14 outputs with fixed 1.8 V VDDO and no per-output format selection. | Requires external regulators and level shifters for mixed-voltage designs; better suited for ultra-low-jitter cleaning than flexible synthesis. | Select when sub-100 fs jitter cleaning is primary requirement and system already includes clean reference; avoid for any-frequency synthesis needs. |
Compared with SI5332DC08862-GM3R, the Si5332DC08863-GM3R trades external crystal flexibility for reduced BOM and layout complexity, while the LMK04832RHAT offers superior jitter cleaning at the expense of synthesis flexibility and voltage/format configurability - making SI5332DC08862-GM3R optimal for cost-sensitive, multi-protocol clock tree consolidation.
Availability
SI5332DC08862-GM3R is available at Aetrix Electronics and suitable for Ethernet switches, server motherboards, and mobile fronthaul equipment requiring stable component supply, long-term lifecycle support, and factory-programmed reliability.
Supply support for SI5332DC08862-GM3R 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
Silicon Labs is a fabless semiconductor company specializing in timing, wireless, and IoT solutions, with design centers in Austin, Boston, and Munich.
The Si5332 family was engineered to replace multiple discrete clock sources in high-density networking and computing systems - prioritizing synthesis flexibility, jitter performance, and mixed-supply compatibility over legacy pin-count constraints.
FAQ
What is the crystal frequency range supported by SI5332DC08862-GM3R?
The SI5332DC08862-GM3R supports external fundamental-mode crystals from 16 MHz to 50 MHz on its XA/XB pins. Internal load capacitance is programmable from 2 pF to 30 pF via register settings, allowing optimization for low-cost crystals without external capacitors. This range enables stable free-run operation across industrial temperature extremes while maintaining <190 fs RMS jitter.
Does SI5332DC08862-GM3R support PCIe Gen4 SRIS compliance?
Yes, SI5332DC08862-GM3R meets PCIe Gen4 SRIS (Spread Spectrum Independent Spread) requirements with 190 fs RMS phase jitter (12 kHz–20 MHz) using an external crystal. Its MultiSynth™ architecture ensures 0 ppm frequency error for integer and non-integer ratios, and its configurable output skew compensates for inter-lane timing mismatches - both essential for reliable 16 GT/s link training.
Can SI5332DC08862-GM3R generate both LVDS and LVPECL outputs simultaneously?
Yes, SI5332DC08862-GM3R supports concurrent LVDS and LVPECL outputs: each of its 12 differential outputs is independently configurable as LVDS, LVPECL, HCSL, or LVCMOS via ClockBuilder Pro or I²C. For example, OUT0/OUT0b can be set to LVDS for a CPU clock while OUT6/OUT6b runs as LVPECL for a SerDes PHY - eliminating external level translators in mixed-interface systems.
How many independent frequency synthesis paths does SI5332DC08862-GM3R provide?
SI5332DC08862-GM3R provides up to three independent fractional synthesis paths (MultiSynth0–2) and five independent integer dividers (INT0–4). These paths feed a cross-point mux that routes any synthesized frequency to any output, enabling fully independent clock generation - e.g., 100 MHz for DDR, 156.25 MHz for Ethernet, and 245.76 MHz for CPRI - all from a single 25 MHz crystal reference.
Is SI5332DC08862-GM3R programmable after soldering to the PCB?
Yes, SI5332DC08862-GM3R supports full in-circuit programming via its I²C interface (SCLK/SDATA pins). While factory-programmed with a ClockBuilder Pro configuration, users can reconfigure output frequencies, formats, and skew settings post-soldering - including dynamic multi-profile switching - without requiring UV erasure or rework. The NVM retains the default configuration for power-up reliability.
SI5332DC08862-GM3R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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:
- -
SI5332DC08862-GM3R FAQ
1.How can I place an order for SI5332DC08862-GM3R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI5332DC08862-GM3R 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 SI5332DC08862-GM3R reliable?
The price and inventory of SI5332DC08862-GM3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5332DC08862-GM3R is usually 5 days.
3.What payment methods are accepted for SI5332DC08862-GM3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5332DC08862-GM3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI5332DC08862-GM3R?
SI5332DC08862-GM3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI5332DC08862-GM3R 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 SI5332DC08862-GM3R?
For technical support, including SI5332DC08862-GM3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5332DC08862-GM3R requirements.
6.How does Aetrix verify that SI5332DC08862-GM3R is sourced from the original manufacturer or authorized distributors?
All SI5332DC08862-GM3R 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 SI5332DC08862-GM3R meets industry standards.
7.What is the process for return or replacement of SI5332DC08862-GM3R?
All SI5332DC08862-GM3R units undergo pre-shipment inspection (PSI). If there is an issue with SI5332DC08862-GM3R, 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 SI5332DC08862-GM3R part is unused and in its original packaging.
Return procedure for SI5332DC08862-GM3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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