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Skyworks Solutions Inc. SI5332AC08815-GM1
- Part No.:
- SI5332AC08815-GM1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SI5332AC08815-GM1.pdf
- Description:
- IC CLOCK GENERATOR QFN
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Inventory:4,540
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Product details
Overview
SI5332AC08815-GM1 from Silicon Labs is a 6-output, 32-pin QFN programmable clock generator with MultiSynth™ fractional synthesis, delivering 190 fs RMS phase jitter (external crystal), 5–333.33 MHz differential output frequency range, and support for LVDS/LVPECL/HCSL/LVCMOS signal formats per output. It serves as a single-device clock tree solution in Ethernet switch timing and PCIe Gen4-compliant server backplanes.
For engineers reviewing the SI5332AC08815-GM1 datasheet, SI5332AC08815-GM1 pinout, SI5332AC08815-GM1 application, or SI5332AC08815-GM1 equivalent, key selection criteria include its 6-differential-output capability, external 16–50 MHz crystal interface, independent VDDO per output bank, I²C programmability, and PCIe Gen1/2/3/4 + SRIS compliance.
Technical Context
The SI5332AC08815-GM1 implements a two-stage synthesis architecture: a wideband PLL locks to an external 16–50 MHz crystal (XA/XB pins) or differential input clock, then feeds up to three independent MultiSynth fractional dividers and five integer dividers. Its cross-point mux routes any synthesized or divided frequency to any of six differential outputs.
Each output supports user-configurable format (LVDS/LVPECL/HCSL/LVCMOS), skew adjustment in 35 ps steps (±122.5 ps), and synchronous enable/disable. Input selection is configurable via I²C or two universal hardware pins (CLKIN_SEL[1:0]), with initialization loading factory-programmed NVM configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Count | 6 differential clock outputs (or 12 LVCMOS), each with dedicated VDDO supply pin |
| Jitter Performance | 190 fs RMS (measured at 12 kHz–20 MHz offset, external crystal reference) |
| Frequency Range | Differential outputs: 5–333.33 MHz; supports integer and fractional synthesis up to 250 MHz |
| Input Reference | External crystal: 16–50 MHz on XA/XB; no embedded crystal (Si5332A variant) |
| Supply Voltages | VDD core: 1.8/2.5/3.3 V; VDDO per output: 1.5/1.8/2.5/3.3 V (LVCMOS) or 1.8/2.5/3.3 V (differential) |
| Interface | I²C serial interface (SCLK/SDATA); supports in-system programming and multi-profile storage |
| Compliance | PCIe Gen1/2/3/4 and SRIS compliant; RoHS-6 certified |
Pinout & Package
SI5332AC08815-GM1 uses a 32-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per the Si5332A/B/C/D 32-QFN pinout specification in the official datasheet (Rev. 1.1, Section 6.3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XA, XB | Crystal oscillator input | Connects to external 16–50 MHz fundamental-mode crystal; internal load capacitance configurable (2–30 pF) or disabled |
| CLKIN_2, CLKIN_2# | Differential input clock | Accepts LVPECL/LVDS/HCSL signals (10–250 MHz); AC-coupled, register-selectable input source |
| OUT0–OUT5, OUT0b–OUT5b | Differential clock outputs | 6 fully independent differential pairs; each pair supports format selection, skew tuning, and individual VDDO supply |
| VDDO0–VDDO5 | Output driver supply | Dedicated power pins per output pair-enables mixed-supply operation (e.g., 1.8 V for one bank, 3.3 V for another) |
| SCLK, SDATA | I²C interface | Standard two-wire serial bus for configuration, register access, and NVM programming |
| OEb, IN1–IN5 | Universal hardware inputs | Five configurable pins supporting OE, spread-spectrum enable, input select, or I²C address (defined in ClockBuilder Pro) |
Key Features
| Feature | Design Value |
|---|---|
| MultiSynth™ fractional synthesis | Enables zero-ppm error generation of any frequency up to 250 MHz on any output-replaces multiple fixed-frequency oscillators |
| Cross-point output mux | Routes any MultiSynth or integer-divider output to any of six differential outputs-maximizes routing flexibility without redesign |
| Independent VDDO per output | Allows simultaneous 1.8 V LVDS and 3.3 V HCSL outputs on same device-eliminates level-shifting ICs in mixed-voltage systems |
| Configurable output skew | Adjustable ±122.5 ps in 35 ps steps per differential pair-enables precise timing alignment across SerDes lanes |
| PCIe Gen4/SRIS compliance | Meets stringent jitter and spectral requirements for high-speed serial interfaces-validated for direct use in root complex and endpoint timing |
Applications
| Server Backplane Timing | Ethernet Switch PHY Clocking |
|---|---|
Use Scenario: Generating synchronized 156.25 MHz, 312.5 MHz, and 625 MHz clocks for multiple PCIe Gen4 slots and 10G/25G Ethernet PHYs on a single motherboard. IC Role / Device Role / Timing Role: Central clock tree generator providing low-jitter, multi-frequency reference to CPU, GPU, NIC, and switch ASICs. Use Value: Replaces four discrete oscillators and two fanout buffers-reducing BOM count by 7 components and PCB area by >25 mm². | Use Scenario: Delivering phase-aligned 125 MHz, 156.25 MHz, and 312.5 MHz clocks to 10GBASE-KR, 25GBASE-KR, and 100GBASE-KR PHYs in a modular line card. IC Role / Device Role / Timing Role: Programmable clock source with per-output format and voltage control for heterogeneous PHY interfaces. Use Value: Enables single-firmware support for multiple PHY vendors via software-reconfigurable outputs-cutting qualification time by 40%. |
| Broadcast Video Synchronization | Industrial Embedded Computing |
Use Scenario: Providing SMPTE ST 2059-2–compliant 27 MHz, 74.25 MHz, and 148.5 MHz reference clocks to video encoder/decoder FPGAs and frame synchronizers. IC Role / Device Role / Timing Role: Precision jitter-cleaner and frequency translator bridging genlock reference to multiple processing blocks. Use Value: Achieves <1 ns peak-to-peak jitter across all outputs-meeting broadcast-grade timing stability without external reclocking. | Use Scenario: Supplying 25 MHz, 50 MHz, and 100 MHz clocks to ARM-based SoC, DDR3 memory controller, and CAN FD transceiver in ruggedized edge gateway. IC Role / Device Role / Timing Role: Single-chip timing solution supporting mixed-signal voltage domains and extended temperature operation. Use Value: Operates reliably from –40 °C to +85 °C with no derating-avoids thermal margin compromises in uncooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable clock generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5332BC08815-GM1 | Same 32-QFN package and pinout; Si5332B variant limited to 200 MHz max output frequency (vs. 333.33 MHz) | Suitable only where highest-frequency outputs (e.g., 312.5 MHz for 25G Ethernet) are not required | Select when cost sensitivity outweighs need for >200 MHz outputs; retains identical footprint and software compatibility |
| Si5338AC08815-GM1 | 4-output, 24-QFN device; lower channel count, no fractional synthesis (integer-only), 175 fs RMS jitter (embedded crystal) | Targeted at simpler clock trees with ≤4 outputs and no non-integer ratios (e.g., legacy PCIe Gen2 designs) | Choose for space-constrained boards needing only integer frequencies and lower pin count-requires layout change and firmware update |
Compared with SI5332BC08815-GM1, the SI5332AC08815-GM1 enables higher-speed serial interfaces (25G/100G Ethernet, PCIe Gen4); versus SI5338AC08815-GM1, it provides greater frequency flexibility and output count at the cost of larger package and higher complexity.
Availability
SI5332AC08815-GM1 is available at Aetrix Electronics and suitable for server backplanes, Ethernet switching infrastructure, broadcast video equipment, and industrial embedded computing requiring stable component supply and long-term design-in support.
Supply support for SI5332AC08815-GM1 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 over 20 years of leadership in high-performance clock technology.
The Si5332 family was designed to replace multiple discrete clock sources with a single programmable device for datacenter, networking, and communications equipment demanding ultra-low jitter and flexible frequency synthesis.
FAQ
What is the maximum output frequency supported by the SI5332AC08815-GM1?
The SI5332AC08815-GM1 supports differential output frequencies from 5 MHz to 333.33 MHz. This upper limit applies to integer synthesis mode; fractional synthesis supports up to 250 MHz per output. The 333.33 MHz capability enables direct generation of 100G Ethernet PAM4 symbol clocks and PCIe Gen4 reference frequencies without external multiplication.
Does the SI5332AC08815-GM1 include an embedded crystal?
No, the SI5332AC08815-GM1 does not include an embedded crystal. As indicated by the "A" suffix in its part number, it belongs to the Si5332A/B/C/D series, which requires an external 16–50 MHz fundamental-mode crystal connected to the XA/XB pins. Embedded crystal variants (e.g., Si5332E/F/G/H) use a different ordering structure and are not interchangeable.
How many independent power supplies does the SI5332AC08815-GM1 support for its outputs?
The SI5332AC08815-GM1 supports six independent VDDO supply pins-one per differential output pair (VDDO0 through VDDO5). This allows each output bank to operate at a different voltage (1.5 V, 1.8 V, 2.5 V, or 3.3 V for LVCMOS; 1.8 V, 2.5 V, or 3.3 V for differential formats), enabling true mixed-supply clock distribution without external level shifters.
Can the SI5332AC08815-GM1 be programmed in-system after soldering?
Yes, the SI5332AC08815-GM1 supports full in-system programming via its I²C interface (SCLK/SDATA pins). Configuration can be loaded at power-up from internal NVM or dynamically updated during operation. ClockBuilder Pro generates register maps and custom configuration files, and factory pre-programming is available at no additional charge for production volumes.
Is the SI5332AC08815-GM1 compliant with PCIe Gen4 timing requirements?
Yes, the SI5332AC08815-GM1 is explicitly validated for PCIe Gen1/2/3/4 and SRIS compliance. Its 190 fs RMS phase jitter (12 kHz–20 MHz integration bandwidth, external crystal) meets the PCIe Gen4 common clock jitter budget of ≤250 fs RMS, making it suitable for direct use as the primary reference clock in root complexes, switches, and endpoints.
SI5332AC08815-GM1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tray
- 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:
- -
SI5332AC08815-GM1 FAQ
1.How can I place an order for SI5332AC08815-GM1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI5332AC08815-GM1 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 SI5332AC08815-GM1 reliable?
The price and inventory of SI5332AC08815-GM1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5332AC08815-GM1 is usually 5 days.
3.What payment methods are accepted for SI5332AC08815-GM1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5332AC08815-GM1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI5332AC08815-GM1?
SI5332AC08815-GM1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI5332AC08815-GM1 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 SI5332AC08815-GM1?
For technical support, including SI5332AC08815-GM1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5332AC08815-GM1 requirements.
6.How does Aetrix verify that SI5332AC08815-GM1 is sourced from the original manufacturer or authorized distributors?
All SI5332AC08815-GM1 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 SI5332AC08815-GM1 meets industry standards.
7.What is the process for return or replacement of SI5332AC08815-GM1?
All SI5332AC08815-GM1 units undergo pre-shipment inspection (PSI). If there is an issue with SI5332AC08815-GM1, 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 SI5332AC08815-GM1 part is unused and in its original packaging.
Return procedure for SI5332AC08815-GM1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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