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Skyworks Solutions Inc. SI5332AC08533-GM3
- Part No.:
- SI5332AC08533-GM3
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SI5332AC08533-GM3.pdf
- Description:
- IC CLOCK GENERATOR QFN
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Product details
Overview
SI5332AC08533-GM3 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. It serves as a single-chip clock tree solution in high-speed Ethernet switches requiring precise, low-jitter timing across multiple PHYs and MACs.
For engineers reviewing the SI5332AC08533-GM3 datasheet, SI5332AC08533-GM3 pinout, SI5332AC08533-GM3 application, or SI5332AC08533-GM3 equivalent, key selection criteria include its 48-pin QFN package, embedded configuration for PCIe Gen4-compliant outputs, multi-bank independent VDDO support (1.8/2.5/3.3 V), and I²C programmability for field tuning.
Technical Context
The SI5332AC08533-GM3 implements a two-stage synthesis architecture: a wideband PLL locks to an external 16–50 MHz crystal (XA/XB), then feeds up to three independent MultiSynth fractional dividers and five integer dividers. Its cross-point mux routes any synthesized frequency to any of twelve differential outputs.
Each output bank (A–D) shares a dedicated VDDO supply, enabling mixed-voltage operation; configurable skew (±245 ps in 35 ps steps), synchronous enable/disable, and per-output format selection (LVDS/LVPECL/HCSL/LVCMOS) are implemented via register control or ClockBuilder Pro–assigned hardware pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 12 differential clock outputs (24 LVCMOS possible), organized in four banks (A–D) with shared VDDO per bank |
| Jitter (RMS) | 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 with 0 ppm error |
| 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 banks: 1.8/2.5/3.3 V (differential), 1.5/1.8/2.5/3.3 V (LVCMOS) |
| Interface | I²C serial interface (SCLK/SDATA); pre-programmed NVM config loads at power-up |
| Operating temp | –40 °C to +85 °C industrial grade, RoHS-6 compliant |
Pinout & Package
SI5332AC08533-GM3 uses a 6×6 mm, 48-pin QFN package (GM suffix) with exposed thermal pad. Pin functions are defined per the Si5332A/B/C/D 48-QFN pinout in the datasheet - including 12 differential output pairs (OUT0/OUT0b through OUT11/OUT11b), six VDDO supply pins (VDDO0–VDDO5), crystal inputs (XA/XB), three differential clock inputs (CLKIN_2/CLKIN_2#, CLKIN_3/CLKIN_3#), I²C bus (SCLK/SDATA), and seven universal hardware input pins (INPUT1–INPUT7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0 / OUT0b | Differential clock output pair (Bank A) | Configurable signal format (LVDS/LVPECL/HCSL); individually enabled/disabled; skew adjustable ±245 ps |
| VDDO0 | Output bank supply (Bank A) | Powers OUT0/OUT0b and OUT1/OUT1b; supports 1.8/2.5/3.3 V for differential signaling |
| XA / XB | External crystal connection | Accepts 16–50 MHz fundamental-mode crystal; internal CL selectable (2–30 pF) or disabled for external tuning |
| SCLK / SDATA | I²C serial interface | Allows in-system reconfiguration; operates at up to 400 kHz; supports read/write of all configuration registers |
| INPUT1–INPUT7 | Universal hardware control pins | Configurable in ClockBuilder Pro as OE#, spread-spectrum enable, input select, or I²C address bits |
Key Features
| Feature | Design Value |
|---|---|
| MultiSynth™ fractional synthesis | Enables any-frequency generation up to 250 MHz on any output with zero ppm frequency error |
| Per-output signal format | Each of 12 outputs independently set to LVDS, LVPECL, HCSL, or LVCMOS - no external level shifters required |
| Multi-bank VDDO architecture | Four independent output banks (A–D) with separate VDDO supplies allow mixed-voltage clock distribution on one IC |
| Configurable output skew | 245 ps total adjustment range in 35 ps steps per differential pair - enables precise inter-bank timing alignment |
| Synchronous output disable | Prevents runt pulses by disabling drivers only at clock cycle boundaries - critical for glitch-free hot-swap applications |
| Spread spectrum modulation | Center or down-spread from –0.1% to –2.5% at 30–33 kHz - reduces EMI without affecting system timing margins |
Applications
| 100G Ethernet Switches | PCIe Gen4 Server Backplanes |
|---|---|
Use Scenario: Timing synchronization across 16+ SerDes lanes in a modular L3 switch ASIC with multiple PHY interfaces. IC Role / Device Role / Timing Role: Single-device clock tree generator providing 12 independent, low-jitter clocks for SERDES reference, CPU, memory controller, and management MCU. Use Value: Eliminates 4–6 discrete oscillators and buffers; reduces board area by 35% and jitter accumulation across domains by >40% vs. multi-IC solution. | Use Scenario: Reference clock distribution for PCIe Gen4 x16 slots, root complex, and NVMe SSD controllers in rack-mount servers. IC Role / Device Role / Timing Role: Generates PCIe-compliant 100 MHz differential clocks with SRIS compliance and <190 fs RMS jitter for all endpoints. Use Value: Meets PCIe Gen4 jitter budget (≤1.0 ps RMS) at source; eliminates need for separate jitter cleaners or retimers in mid-board locations. |
| Broadcast Video Routers | 5G Small Cell Baseband Units |
Use Scenario: Frame-accurate genlock and transport stream timing across SDI, HDMI, and IP video processing paths in 4K/8K production routers. IC Role / Device Role / Timing Role: Delivers synchronized 27 MHz, 74.25 MHz, and 148.5 MHz clocks with sub-100 ps inter-output skew for video encoder/decoder clusters. Use Value: Enables deterministic frame boundary alignment across heterogeneous video subsystems; avoids lip-sync drift in multi-path encoding. | Use Scenario: Synchronizing FPGA-based baseband processing, RFIC interfaces, and fronthaul transport in compact 5G NR small cells. IC Role / Device Role / Timing Role: Provides 30.72 MHz, 122.88 MHz, and 245.76 MHz clocks with tight phase coherence for LTE/5G numerology and CPRI/eCPRI links. Use Value: Supports O-RAN-defined timing accuracy (<100 ns phase error over temperature); replaces dual-clock IC + jitter cleaner stack. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable clock generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5332BC08533-GM3 | Same 48-QFN package and pinout; Si5332B variant supports max 200 MHz output (vs. 333.33 MHz for Si5332A) | Limited to lower-frequency SerDes (e.g., SFP+ 10G, not 25G/100G); unsuitable for PCIe Gen4 100 MHz reference | Select only if output frequencies ≤200 MHz and cost sensitivity outweighs headroom needs. |
| LMK5B33414RGZR | TI device with 4 outputs, integrated 2.5 GHz VCO, 90 fs RMS jitter (lower), but no embedded NVM pre-programming; requires external EEPROM | Not drop-in: fewer outputs, different pinout, no multi-bank VDDO; better for ultra-low-jitter single-domain apps, not multi-supply clock trees | Choose when absolute jitter minimization is primary and system-level flexibility (e.g., dynamic reconfig) is preferred over factory-programmed simplicity. |
Compared with Si5332BC08533-GM3, the SI5332AC08533-GM3 enables higher-speed SerDes and PCIe Gen4; compared with LMK5B33414RGZR, it offers greater output count, factory-configured reliability, and native multi-voltage bank support - making it optimal for dense, mixed-supply infrastructure timing.
Availability
SI5332AC08533-GM3 is available at Aetrix Electronics and suitable for 100G Ethernet switches, PCIe Gen4 server backplanes, broadcast video routers, and 5G small cell baseband units requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SI5332AC08533-GM3 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 leadership in low-jitter clock technology and configurable mixed-signal ICs.
The Si5332 family was designed to replace multiple fixed-frequency oscillators and clock buffers with a single programmable, high-flexibility clock generator for datacenter, telecom, and broadcast infrastructure where timing precision, density, and supply voltage agility are critical.
FAQ
What is the maximum output frequency supported by the SI5332AC08533-GM3?
The SI5332AC08533-GM3 supports differential output frequencies up to 333.33 MHz and LVCMOS outputs up to 170 MHz. This capability stems from its Si5332A-grade silicon, which enables full integer and fractional synthesis mode - unlike Si5332B/D/F/H variants limited to 200 MHz. The 333.33 MHz ceiling directly supports 100G Ethernet PAM4 SerDes and PCIe Gen4 x16 reference clocks.
Does the SI5332AC08533-GM3 include an embedded crystal?
No, the SI5332AC08533-GM3 does not include an embedded crystal. As indicated by the "A" in its part number (Si5332AC08533-GM3), it belongs to the external-crystal variant group (Si5332A/B/C/D). It requires a 16–50 MHz fundamental-mode crystal connected to XA/XB pins. Embedded crystal versions use "E/F/G/H" suffixes (e.g., Si5332EC08533-GM3).
How many independent power supply domains does the SI5332AC08533-GM3 support for its outputs?
The SI5332AC08533-GM3 supports four independent output power domains via its VDDO0–VDDO5 pins, grouped as Bank A (VDDO0), Bank B (VDDO1), Bank C (VDDO2/VDDO3), and Bank D (VDDO4/VDDO5). Each bank powers a subset of differential outputs and can be set to 1.8 V, 2.5 V, or 3.3 V - enabling simultaneous LVDS (2.5 V), LVPECL (3.3 V), and HCSL (1.8 V) signaling on one device.
Can the SI5332AC08533-GM3 be reprogrammed after deployment?
Yes, the SI5332AC08533-GM3 supports full in-system reprogramming via its I²C interface (SCLK/SDATA pins). While it ships with a factory-programmed configuration stored in non-volatile memory (NVM), all registers - including frequency, format, skew, and enable settings - can be modified dynamically by a host processor. ClockBuilder Pro generates the required register map for field updates without requiring hardware changes.
Is the SI5332AC08533-GM3 compliant with PCIe Gen4 timing requirements?
Yes, the SI5332AC08533-GM3 is explicitly designed for PCIe Gen4 compliance. With 190 fs RMS phase jitter (12 kHz–20 MHz), it meets the PCIe Gen4 specification's 1.0 ps RMS total jitter limit at the source. Its SRIS (Spread Spectrum Independent Support) capability and low-skew, synchronous output disable further ensure robust operation in PCIe root complex and endpoint applications.
SI5332AC08533-GM3 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:
- -
SI5332AC08533-GM3 FAQ
1.How can I place an order for SI5332AC08533-GM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI5332AC08533-GM3 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 SI5332AC08533-GM3 reliable?
The price and inventory of SI5332AC08533-GM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5332AC08533-GM3 is usually 5 days.
3.What payment methods are accepted for SI5332AC08533-GM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5332AC08533-GM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI5332AC08533-GM3?
SI5332AC08533-GM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI5332AC08533-GM3 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 SI5332AC08533-GM3?
For technical support, including SI5332AC08533-GM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5332AC08533-GM3 requirements.
6.How does Aetrix verify that SI5332AC08533-GM3 is sourced from the original manufacturer or authorized distributors?
All SI5332AC08533-GM3 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 SI5332AC08533-GM3 meets industry standards.
7.What is the process for return or replacement of SI5332AC08533-GM3?
All SI5332AC08533-GM3 units undergo pre-shipment inspection (PSI). If there is an issue with SI5332AC08533-GM3, 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 SI5332AC08533-GM3 part is unused and in its original packaging.
Return procedure for SI5332AC08533-GM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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