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Skyworks Solutions Inc. SI5332DC08279-GM3R
- Part No.:
- SI5332DC08279-GM3R
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SI5332DC08279-GM3R.pdf
- Description:
- IC CLOCK GENERATOR QFN
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Product details
Overview
SI5332DC08279-GM3R from Silicon Labs is a 12-output, any-frequency programmable 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. It serves as a single-device clock tree solution in high-speed Ethernet switch timing systems.
For engineers reviewing the SI5332DC08279-GM3R datasheet, SI5332DC08279-GM3R pinout, SI5332DC08279-GM3R application, or SI5332DC08279-GM3R equivalent, key selection criteria include its 48-pin QFN package, embedded 50 MHz crystal option (E/F/G/H grade), 3.3 V/2.5 V/1.8 V output supply flexibility, and I²C programmability for multi-profile configuration.
Technical Context
The SI5332DC08279-GM3R implements a wideband PLL paired with up to three independent fractional MultiSynth™ synthesis paths and five integer dividers, enabling simultaneous generation of non-integer-related frequencies across 12 differential outputs. Its cross-point mux routes any synthesized or divided frequency to any output bank.
It supports free-run mode using an external 16–50 MHz crystal or embedded 50 MHz crystal (Si5332E/F/G/H variant), and synchronous mode via differential (10–250 MHz) or LVCMOS (10–170 MHz) input clocks. Output banks (A–D) feature independent VDDO supplies (1.8/2.5/3.3 V) and configurable skew (±245 ps in 35 ps steps).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 12 differential outputs (24 LVCMOS possible), organized in four independently powered banks (A–D) |
| Jitter performance | 190 fs RMS (measured with external crystal reference), enabling PCIe Gen4/SRIS compliance |
| Frequency synthesis | Any-frequency generation up to 333.33 MHz using fractional MultiSynth™; 0 ppm synthesis error |
| Input options | External crystal (16–50 MHz) or embedded 50 MHz crystal; differential clock (10–250 MHz); LVCMOS clock (10–170 MHz) |
| Output format | User-selectable per output: LVDS, LVPECL, HCSL, or LVCMOS with programmable swing and polarity |
| Supply voltages | Core VDD: 1.8/2.5/3.3 V; Output banks: 1.8/2.5/3.3 V (diff), 1.5/1.8/2.5/3.3 V (LVCMOS) |
| Package | 48-pin QFN (6 × 6 mm), RoHS-6 compliant, tape-and-reel (R suffix) |
Pinout & Package
SI5332DC08279-GM3R uses a 48-pin QFN (6 × 6 mm) package with exposed thermal pad. Pin functions align with Si5332-GM3 architecture: six VDDO pins (VDDO0–VDDO5) power four output banks; twelve differential output pairs (OUT0/OUT0b through OUT11/OUT11b); dedicated XTAL pins for external crystal; CLKIN_2/CLKIN_2# and CLKIN_3/CLKIN_3# differential inputs; seven universal hardware input pins (Input1–Input7) configurable as OE, spread-spectrum enable, or input select; I²C interface (SCLK/SDATA); and NVM programming support.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0 / OUT0b | Differential clock output pair (Bank A) | Configurable signal format (LVDS/LVPECL/HCSL); driven by cross-point mux from MultiSynth0/1 or INT divider |
| VDDO0 | Output supply for Bank A | Independent 1.8/2.5/3.3 V supply enabling mixed-voltage system interfacing |
| XTAL / XA / XB | External crystal connection | Supports 16–50 MHz fundamental-mode crystals; internal load capacitance selectable (2–30 pF) or disabled |
| CLKIN_2 / CLKIN_2# | Differential input clock (primary) | Accepts 10–250 MHz LVPECL/LVDS/HCSL; AC-coupled; used for synchronous mode locking |
| Input1–Input7 | Universal hardware control pins | Configurable in ClockBuilder Pro as OE, spread-spectrum enable, CLKIN_SEL[1:0], or I²C address select |
| SCLK / SDATA | I²C serial interface | Enables in-system reprogramming; supports multi-profile storage and glitchless on-the-fly frequency changes |
Key Features
| Feature | Design Value |
|---|---|
| MultiSynth™ fractional synthesis | Enables zero-error generation of arbitrary frequencies up to 333.33 MHz on any output - eliminates need for multiple fixed-frequency oscillators |
| Per-output signal format selection | Each of 12 outputs independently set to LVDS, LVPECL, HCSL, or LVCMOS - simplifies interface to heterogeneous ASIC/FPGA peripherals |
| Four independent output voltage banks | Bank A–D each powered by dedicated VDDO (1.8/2.5/3.3 V) - supports mixed-supply SoC timing without level shifters |
| Configurable output skew | ±245 ps adjustment in 35 ps steps per differential pair - enables precise inter-bank clock alignment for DDR or SerDes applications |
| Embedded 50 MHz crystal option | Si5332E/F/G/H grade includes factory-integrated crystal - reduces BOM count and PCB layout complexity vs. external crystal design |
| Multi-profile configuration | Stores up to 16 complete input/output configurations in NVM - enables dynamic switching between system operating modes (e.g., low-power vs. full-bandwidth) |
Applications
| Server Clock Tree | Ethernet Switch Timing |
|---|---|
Use Scenario: Generating synchronized clocks for CPU, memory controller, PCIe root complex, and NICs in dual-socket x86 servers. IC Role / Device Role / Timing Role: Central clock generator providing 12 low-jitter outputs with independent voltage domains and format flexibility. Use Value: Replaces 4–6 discrete clock ICs and oscillators; eliminates inter-clock skew; supports PCIe Gen4 SRIS compliance via 190 fs RMS jitter. | Use Scenario: Delivering precisely timed reference clocks to multiple line cards, packet processors, and PHYs in modular 10/25/100 GbE switches. IC Role / Device Role / Timing Role: High-count, low-jitter clock source with bank-level voltage isolation for mixed-voltage SerDes interfaces. Use Value: Enables deterministic latency across switch fabric; supports hitless failover via multi-profile NVM storage and register-controlled input switching. |
| Broadcast Video Sync | Industrial Embedded Computing |
Use Scenario: Distributing genlock-capable reference clocks (e.g., 27 MHz, 74.25 MHz, 148.5 MHz) to video encoders, decoders, and frame synchronizers in broadcast infrastructure. IC Role / Device Role / Timing Role: Any-frequency synthesizer generating SMPTE-compliant video clocks with sub-picosecond jitter stability. Use Value: Eliminates frame jitter and lip-sync errors; supports simultaneous generation of multiple video standards from one device. | Use Scenario: Providing robust, programmable clocks for ARM-based industrial gateways with isolated CAN, Ethernet, and sensor interfaces. IC Role / Device Role / Timing Role: Configurable clock generator supporting extended temperature (–40 to +85 °C), spread spectrum for EMI reduction, and I²C reprogramming in field. Use Value: Reduces qualification effort across variants; enables firmware-updatable timing for future protocol upgrades (e.g., TSN, Time-Sensitive Networking). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable clock generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338AC10221-GM | 8-output, 40-pin QFN; max 220 MHz output; 150 fs RMS jitter (embedded crystal); no embedded crystal option in DC-grade | Lower output count and frequency ceiling; optimized for cost-sensitive mid-tier applications | Select when 8 outputs suffice and <220 MHz operation meets system requirements |
| LMK04832RHAT | 14-output, 48-pin WQFN; dual-loop PLL architecture; 115 fs RMS jitter; supports JESD204B deterministic latency | Targeted at high-end data converter timing; requires external loop filter; higher power consumption | Select for JESD204B-compliant ADC/DAC timing where sub-120 fs jitter is mandatory |
Compared with Si5338AC10221-GM and LMK04832RHAT, SI5332DC08279-GM3R uniquely balances 12-output flexibility, 333.33 MHz capability, and 190 fs jitter in a single-chip solution with embedded crystal option and intuitive ClockBuilder Pro configuration - making it optimal for scalable, multi-protocol infrastructure timing.
Availability
SI5332DC08279-GM3R is available at Aetrix Electronics and suitable for Ethernet switch timing, server clock tree consolidation, broadcast video synchronization, and industrial embedded computing requiring stable component supply across extended temperature and long product lifecycles.
Supply support for SI5332DC08279-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 deep expertise in high-performance clock generation and low-jitter synthesis.
The Si5332 family was designed to replace multiple fixed-frequency clocks and oscillators with a single, software-configurable device for infrastructure equipment - emphasizing flexibility, jitter performance, and ease of integration via ClockBuilder Pro.
FAQ
What is the core function of the SI5332DC08279-GM3R in a timing system?
The SI5332DC08279-GM3R serves as a high-flexibility, low-jitter clock generator that synthesizes up to twelve independent output frequencies from a single reference - eliminating the need for multiple discrete oscillators and clock buffers. Its MultiSynth™ architecture ensures 0 ppm frequency error and 190 fs RMS jitter, making SI5332DC08279-GM3R ideal for PCIe Gen4, Ethernet, and broadcast video timing where precision and integration are critical.
Does the SI5332DC08279-GM3R include an integrated crystal?
No - SI5332DC08279-GM3R corresponds to the Si5332D grade, which requires an external 16–50 MHz crystal connected to XA/XB pins. Embedded crystal variants (e.g., Si5332E/F/G/H) use part numbers ending in -GM3E, -GM3F, etc. The "DC" prefix in SI5332DC08279-GM3R indicates a custom ClockBuilder Pro configuration with external crystal support, not an internal resonator.
How many independent voltage domains does the SI5332DC08279-GM3R support for its outputs?
The SI5332DC08279-GM3R supports four independent output voltage domains (Banks A–D), each powered by its own VDDO pin (VDDO0–VDDO5). This allows differential outputs in each bank to operate at 1.8 V, 2.5 V, or 3.3 V simultaneously - enabling direct interface to mixed-supply FPGAs, ASICs, and SerDes blocks without external level shifters. SI5332DC08279-GM3R's bank-level supply isolation is a key enabler for complex infrastructure timing.
Can the SI5332DC08279-GM3R generate both integer and fractional output frequencies?
Yes - SI5332DC08279-GM3R supports both integer and fractional synthesis modes via its MultiSynth™ engine and integer dividers. It can produce exact integer multiples (e.g., 100 MHz, 156.25 MHz) as well as non-integer ratios (e.g., 122.88 MHz, 125.001 MHz) with zero synthesis error. This dual-mode capability is confirmed in the Si5332 Data Sheet Section 2 (Ordering Guide) and Section 3.3 (Frequency Configuration), and is a defining feature of SI5332DC08279-GM3R.
What software tool is required to configure the SI5332DC08279-GM3R?
ClockBuilder Pro™ software is required to configure SI5332DC08279-GM3R. It calculates optimal divider settings, validates jitter performance, assigns the custom part number (e.g., SI5332DC08279), and generates the configuration file for factory programming or I²C loading. Silicon Labs provides ClockBuilder Pro free of charge; SI5332DC08279-GM3R cannot be meaningfully configured without it due to the complexity of its MultiSynth™ synthesis architecture.
SI5332DC08279-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:
- -
SI5332DC08279-GM3R FAQ
1.How can I place an order for SI5332DC08279-GM3R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI5332DC08279-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 SI5332DC08279-GM3R reliable?
The price and inventory of SI5332DC08279-GM3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5332DC08279-GM3R is usually 5 days.
3.What payment methods are accepted for SI5332DC08279-GM3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5332DC08279-GM3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI5332DC08279-GM3R?
SI5332DC08279-GM3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI5332DC08279-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 SI5332DC08279-GM3R?
For technical support, including SI5332DC08279-GM3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5332DC08279-GM3R requirements.
6.How does Aetrix verify that SI5332DC08279-GM3R is sourced from the original manufacturer or authorized distributors?
All SI5332DC08279-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 SI5332DC08279-GM3R meets industry standards.
7.What is the process for return or replacement of SI5332DC08279-GM3R?
All SI5332DC08279-GM3R units undergo pre-shipment inspection (PSI). If there is an issue with SI5332DC08279-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 SI5332DC08279-GM3R part is unused and in its original packaging.
Return procedure for SI5332DC08279-GM3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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