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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Application Specific Clock/Timing

Skyworks Solutions Inc. SI5338F-B04216-GM

Name: SI5338F-B04216-GM
Brand: Skyworks Solutions Inc.
SKU: SI5338F-B04216-GM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI5338F-B04216-GM

Manufacturer:: Skyworks Solutions Inc.

Category:: Application Specific Clock/Timing

Package:: 24-VFQFN Exposed Pad

Datasheet:: SI5338F-B04216-GM.pdf

Description:: I2C CONTROL, 4-OUTPUT, ANY FREQU

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI5338F-B04216-GM from Skyworks Solutions is a quad-output, I²C-programmable clock generator with MultiSynth™ frequency synthesis, delivering four independent low-jitter clocks (0.7 ps RMS typ) across LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats, supporting PCIe Gen 1–4 and Ethernet timing in telecom line cards and FPGA-based systems.

For engineers reviewing the SI5338F-B04216-GM datasheet, SI5338F-B04216-GM pinout, SI5338F-B04216-GM application, or SI5338F-B04216-GM equivalent, key selection criteria include differential output jitter compliance (PCIe Gen 4 SRNS), independent per-output voltage control (1.5–3.3 V), and 4×4 mm 24-QFN package integration for space-constrained high-speed digital systems.

Technical Context

The SI5338F-B04216-GM implements a two-stage PLL architecture: a high-stability reference PLL (loop bandwidth 1.6 MHz) followed by four independent MultiSynth™ fractional-N synthesizers, each capable of integer or fractional mode operation with <20 ps phase step resolution and 1 ppm frequency increment/decrement capability.

It supports flexible input references-including 8–30 MHz crystals, 5–200 MHz CMOS, and up to 710 MHz differential inputs-and provides full output configurability: independent format selection, voltage per driver (1.5/1.8/2.5/3.3 V), spread-spectrum modulation (0.5–5.0% at 33–63 kHz), and loss-of-lock/loss-of-signal alarms.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count & type	4 differential outputs (CLK0A/B through CLK3A/B); supports up to 8 single-ended or mixed configurations
Phase jitter (RMS)	0.7 ps typical (12 kHz–20 MHz), meeting PCIe Gen 4 Common Clock and SRNS requirements
Frequency range	0.16–710 MHz per output; LVPECL/LVDS up to 710 MHz, HCSL up to 250 MHz, CMOS up to 200 MHz
Supply voltages	Core: 1.8/2.5/3.3 V; independent output buffers: 1.5–3.63 V per driver
Package	24-pin QFN, 4 × 4 mm, 0.5 mm pitch, exposed thermal pad
Operating temperature	–40 °C to +85 °C ambient, qualified for industrial and telecom applications
I²C interface	SMBus-compatible, 100 kHz/400 kHz standard/fast mode, with programmable address

Pinout & Package

SI5338F-B04216-GM is housed in a 24-lead, 4 × 4 mm QFN package with wettable flanks and an exposed thermal pad. Pin 1 is located at top-left (IN1), with pins numbered counter-clockwise; GND and VDD pins are distributed for optimal power integrity and thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
IN1, IN2	Differential reference input pair	Accepts 5–710 MHz AC-coupled differential clock; requires external 100 Ω termination
IN3, IN4	Single-ended reference input pair	Supports 5–200 MHz CMOS-level inputs; VIH = 0.7×VDD, VIL = 0.3×VDD
CLK0A, CLK0B – CLK3A, CLK3B	Differential clock outputs	Four independent pairs; each configurable for LVPECL/LVDS/HCSL/CML with per-driver VDDO
VDDO0–VDDO3	Output buffer supply rails	Independent 1.5–3.63 V supplies per output pair; enables mixed-voltage system interfacing
VDD	Core supply	1.8/2.5/3.3 V ± tolerance; powers PLL, logic, and MultiSynth blocks
SCL, SDA	I²C serial interface	Standard bidirectional bus; supports configuration, status readback, and real-time frequency tuning
INTR	Interrupt output	Open-drain alarm signal indicating loss-of-lock, loss-of-signal, or configuration error
RSVD_GND	Reserved ground	Internal test pin; must be connected to GND per layout guidelines

Key Features

Feature	Design Value
MultiSynth™ synthesis	Four independent fractional-N synthesizers enabling any-frequency generation (0.16–710 MHz) with true zero-ppm accuracy on all outputs
Per-output voltage control	Each of four output drivers supports independent VDDO (1.5/1.8/2.5/3.3 V), eliminating level-shifter ICs in multi-voltage SoC/FPGA designs
Glitchless frequency tuning	Hardware-supported frequency increment/decrement via dedicated pins (FINC/FDEC), enabling real-time 1 ppm-step adjustments without interrupting output
Programmable phase offset	±45 ns initial phase adjustment per output with <20 ps step resolution, enabling precise skew alignment across high-speed SerDes lanes
Spread-spectrum clocking	Configurable SSC on any output: 0.5–5.0% spread depth, 33–63 kHz modulation rate-reducing EMI in dense PCB layouts
PCIe Gen 4 compliance	Validated RMS jitter ≤ 0.45 ps (10 kHz–50 MHz) in Common Clock mode and ≤ 0.32 ps in SRNS mode per PCIe Base Spec 4.0

Applications

PCIe Gen 4 Switch Timing	Ethernet Switch/Routing
Use Scenario: Providing synchronized 100 MHz reference clocks to multiple PCIe Gen 4 switch ASICs in a 1U data center switch chassis. IC Role / Device Role / Timing Role: Quad-output clock generator delivering four independent, low-jitter HCSL clocks with matched phase alignment and spread-spectrum support. Use Value: Meets PCIe Gen 4 SRNS jitter spec (≤0.32 ps RMS), eliminates need for four discrete oscillators, and reduces board area by >60% versus discrete solution.	Use Scenario: Generating 125 MHz, 156.25 MHz, and 312.5 MHz clocks for 10GbE PHYs, packet processors, and switch fabric interfaces in carrier-grade Ethernet routers. IC Role / Device Role / Timing Role: Programmable frequency translator and buffer, accepting a 25 MHz crystal and synthesizing multiple Ethernet-standard frequencies simultaneously. Use Value: Enables single-crystal design across multi-rate Ethernet subsystems while maintaining sub-1 ps RMS jitter on all outputs.
FPGA-Based Video Processing	Telecom Line Card Clocking
Use Scenario: Supplying precisely phased clocks to Xilinx Versal FPGA transceivers, video processing IPs, and DDR4 memory controllers in broadcast-grade video encoders. IC Role / Device Role / Timing Role: Configurable quad clock source with independent phase offset per output for SerDes lane deskew and memory interface timing alignment. Use Value: Achieves <20 ps inter-output skew and ±45 ns programmable phase offset-critical for deterministic video pipeline latency and DDR4 tDQSS compliance.	Use Scenario: Replacing legacy oscillator arrays on a 3G/4G baseband unit line card requiring OC-12 (155.52 MHz), SyncE (2.048 MHz), and processor clocks. IC Role / Device Role / Timing Role: Multi-format clock generator supporting LVDS, HSTL, and CMOS outputs from a single 19.44 MHz crystal reference. Use Value: Reduces BOM count by 75%, supports ITU-T G.8262 ePRTC holdover via internal PLL stability, and meets OC-12 random jitter spec (≤0.7 ps RMS).

PCIe Gen 4 Switch Timing

Ethernet Switch/Routing

Use Scenario: Providing synchronized 100 MHz reference clocks to multiple PCIe Gen 4 switch ASICs in a 1U data center switch chassis.

IC Role / Device Role / Timing Role: Quad-output clock generator delivering four independent, low-jitter HCSL clocks with matched phase alignment and spread-spectrum support.

Use Value: Meets PCIe Gen 4 SRNS jitter spec (≤0.32 ps RMS), eliminates need for four discrete oscillators, and reduces board area by >60% versus discrete solution.

Use Scenario: Generating 125 MHz, 156.25 MHz, and 312.5 MHz clocks for 10GbE PHYs, packet processors, and switch fabric interfaces in carrier-grade Ethernet routers.

IC Role / Device Role / Timing Role: Programmable frequency translator and buffer, accepting a 25 MHz crystal and synthesizing multiple Ethernet-standard frequencies simultaneously.

Use Value: Enables single-crystal design across multi-rate Ethernet subsystems while maintaining sub-1 ps RMS jitter on all outputs.

FPGA-Based Video Processing

Telecom Line Card Clocking

Use Scenario: Supplying precisely phased clocks to Xilinx Versal FPGA transceivers, video processing IPs, and DDR4 memory controllers in broadcast-grade video encoders.

IC Role / Device Role / Timing Role: Configurable quad clock source with independent phase offset per output for SerDes lane deskew and memory interface timing alignment.

Use Value: Achieves <20 ps inter-output skew and ±45 ns programmable phase offset-critical for deterministic video pipeline latency and DDR4 tDQSS compliance.

Use Scenario: Replacing legacy oscillator arrays on a 3G/4G baseband unit line card requiring OC-12 (155.52 MHz), SyncE (2.048 MHz), and processor clocks.

IC Role / Device Role / Timing Role: Multi-format clock generator supporting LVDS, HSTL, and CMOS outputs from a single 19.44 MHz crystal reference.

Use Value: Reduces BOM count by 75%, supports ITU-T G.8262 ePRTC holdover via internal PLL stability, and meets OC-12 random jitter spec (≤0.7 ps RMS).

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-output programmable clock generator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5332A-D06189-GM	Higher integration: 8 outputs, integrated EEPROM, lower jitter (0.35 ps RMS), but larger 32-QFN (5 × 5 mm) package	Better suited for multi-ASIC platforms requiring >4 clocks or factory pre-programming; not drop-in compatible due to pinout and footprint change	Select when needing ≥8 outputs, tighter jitter budget, or non-volatile configuration storage-requires PCB redesign.
ICS853S02IAGLF	Fixed-function dual-output LVDS clock generator; no I²C programming, no frequency flexibility, higher jitter (1.2 ps RMS)	Limited to fixed-ratio translation (e.g., 100→125 MHz); no spread spectrum, no per-output voltage control	Only viable for simple, static clock fanout where programmability and jitter are secondary to cost and lead time.

Compared with SI5338F-B04216-GM, Si5332A-D06189-GM offers superior jitter and output count but demands layout revision, while ICS853S02IAGLF sacrifices programmability and precision for simplicity-making SI5338F-B04216-GM the optimal balance of flexibility, performance, and 4×4 mm footprint for mid-complexity timing systems.

Availability

SI5338F-B04216-GM is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, Ethernet switching/routing, and FPGA-based video processing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SI5338F-B04216-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, with leadership in RF, timing, and power management ICs for infrastructure, automotive, and mobile markets.

The Si5338 family is engineered for high-performance, multi-protocol clock generation in datacenter, telecom, and enterprise networking equipment-designed to replace multiple discrete oscillators while meeting stringent jitter, flexibility, and footprint requirements.

FAQ

What is the maximum output frequency supported by SI5338F-B04216-GM in LVPECL mode?

The SI5338F-B04216-GM supports LVPECL output frequencies up to 710 MHz, as confirmed in Table 6 of the datasheet. This applies when using differential outputs with appropriate termination and layout practices to maintain signal integrity and jitter performance.

Does SI5338F-B04216-GM support PCIe Gen 4 Separate Reference No Spread (SRNS) timing?

Yes, SI5338F-B04216-GM is explicitly validated for PCIe Gen 4 SRNS mode, delivering ≤0.32 ps RMS jitter (10 kHz–50 MHz) under specified PLL bandwidth (2–4 MHz) and CDR (10 MHz) conditions per Table 12 and application notes.

Can SI5338F-B04216-GM generate different output voltages simultaneously on its four drivers?

Yes, SI5338F-B04216-GM supports independent VDDO supplies (VDDO0–VDDO3), allowing simultaneous LVDS (2.5 V), HCSL (1.8 V), CMOS (3.3 V), and SSTL (1.5 V) outputs-enabling direct interface to mixed-voltage FPGAs, ASICs, and memory devices without external level shifters.

What is the minimum input crystal frequency supported by SI5338F-B04216-GM?

The SI5338F-B04216-GM supports external crystals from 8 MHz to 30 MHz, with specific load capacitance and ESR requirements defined per frequency band in Tables 8–11. An 8 MHz crystal is fully supported and commonly used for low-power, cost-sensitive designs.

How does SI5338F-B04216-GM handle loss-of-signal detection?

SI5338F-B04216-GM provides hardware-based loss-of-signal (LOS) detection on all input pins (IN1–IN6) with configurable thresholds, reporting status via the INTR pin and I²C registers. Detection time is 2.6–5 µs (tLOS), and release time is 0.01–1 µs (tLOSRLS), enabling fast fault response in mission-critical systems.

SI5338F-B04216-GM Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: MultiSynth™

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

PLL:: -

Main Purpose:: -

Input:: -

Output:: -

Number of Circuits:: -

Ratio - Input:Output:: -

Differential - Input:Output:: -

Frequency - Max:: -

Voltage - Supply:: -

Operating Temperature:: -

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 24-QFN (4x4)

SI5338F-B04216-GM FAQ

1.How can I place an order for SI5338F-B04216-GM through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5338F-B04216-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 SI5338F-B04216-GM reliable?

The price and inventory of SI5338F-B04216-GM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5338F-B04216-GM is usually 5 days.

3.What payment methods are accepted for SI5338F-B04216-GM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5338F-B04216-GM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5338F-B04216-GM?

SI5338F-B04216-GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5338F-B04216-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 SI5338F-B04216-GM?

For technical support, including SI5338F-B04216-GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5338F-B04216-GM requirements.

6.How does Aetrix verify that SI5338F-B04216-GM is sourced from the original manufacturer or authorized distributors?

All SI5338F-B04216-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 SI5338F-B04216-GM meets industry standards.

7.What is the process for return or replacement of SI5338F-B04216-GM?

All SI5338F-B04216-GM units undergo pre-shipment inspection (PSI). If there is an issue with SI5338F-B04216-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 SI5338F-B04216-GM part is unused and in its original packaging.

Return procedure for SI5338F-B04216-GM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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