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

Skyworks Solutions Inc. SI5338C-B04853-GMR

Name: SI5338C-B04853-GMR
Brand: Skyworks Solutions Inc.
SKU: SI5338C-B04853-GMR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI5338C-B04853-GMR

Manufacturer:: Skyworks Solutions Inc.

Category:: Application Specific Clock/Timing

Package:: 24-VFQFN Exposed Pad

Datasheet:: SI5338C-B04853-GMR.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI5338C-B04853-GMR from Skyworks Solutions is an I²C-programmable quad clock generator with four independently configurable differential or single-ended outputs, 0.7 ps RMS typical phase jitter, PCIe Gen 1–4 Common Clock and Gen 3 SRNS compliance, and operation across –40 to +85 °C in a 4 × 4 mm 24-QFN package. It replaces up to four crystal oscillators in high-speed serial interface timing applications.

For engineers reviewing the SI5338C-B04853-GMR datasheet, SI5338C-B04853-GMR pinout, SI5338C-B04853-GMR application, or SI5338C-B04853-GMR equivalent, key selection criteria include PCIe jitter compliance, independent output voltage per driver (1.5/1.8/2.5/3.3 V), MultiSynth™ frequency synthesis resolution (1 ppb), spread-spectrum capability (0.5–5.0% down-spread), and I²C/SMBus programmability with ClockBuilder Pro support.

Technical Context

The SI5338C-B04853-GMR implements a two-stage PLL architecture: a high-stability reference stage followed by four independent MultiSynth™ fractional-N synthesizers, each driving one output pair. Each synthesizer supports integer or fractional mode with programmable initial phase offset (±45 ns) and glitchless frequency increment/decrement in 1 ppm steps.

Input flexibility includes external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz) references. Output drivers support LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with independent supply voltage per bank (VDDO0–VDDO3) and configurable slew rate, duty cycle, and spread-spectrum modulation (33–63 kHz rate, 0.5–5.0% deviation).

Key Specifications

Parameter	Value and Actual Design Meaning
Phase Jitter (RMS)	0.7 ps RMS typ (12 kHz–20 MHz); meets PCIe Gen 3 SRNS & Gen 4 common clock requirements
Output Count & Type	Four differential output pairs (CLK0A/B–CLK3A/B); supports up to eight single-ended or mixed-mode outputs
Frequency Range	0.16–710 MHz per output; LVPECL/LVDS up to 710 MHz, HCSL up to 250 MHz, CMOS up to 200 MHz
Synthesis Resolution	1 ppb frequency step size; enables true zero-ppm accuracy on all outputs
Supply Voltages	Core: 1.8/2.5/3.3 V; Output banks: independently configurable 1.5/1.8/2.5/3.3 V
Operating Temp	–40 to +85 °C; qualified for industrial and telecom line card environments
Package	24-pin QFN, 4 × 4 mm, 0.5 mm pitch; RoHS-compliant, halogen-free

Pinout & Package

SI5338C-B04853-GMR is housed in a 24-lead QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow Skyworks' standard Si5338 pinout: dual differential inputs (IN1/IN2, IN5/IN6), two single-ended inputs (IN3, IN4), four differential output pairs (CLK0A/B–CLK3A/B), three dedicated output supply pins (VDDO0–VDDO3), core supply (VDD), I²C interface (SCL, SDA), interrupt (INTR), and reserved ground (RSVD_GND).

Pin/Terminal	Circuit Role	Design Meaning
IN1 / IN2	Differential Reference Input Pair	Accepts 5–710 MHz AC-coupled differential clock; internal 100 Ω termination enabled
CLK0A / CLK0B	Differential Output Pair 0	Configurable format (LVPECL/LVDS/HCSL); driven by MultiSynth₀; VDDO0 supplies output buffer
VDDO0	Output Bank 0 Supply	Independent 1.5/1.8/2.5/3.3 V supply for CLK0A/B; decoupling required
SCL / SDA	I²C Serial Interface	Standard SMBus-compatible 100/400 kHz interface; supports ClockBuilder Pro programming
INTR	Interrupt Output	Open-drain status signal indicating loss-of-lock or loss-of-signal events

Key Features

Feature	Design Value
MultiSynth™ Synthesis	Four independent fractional-N synthesizers enable any-frequency generation with 1 ppb resolution and zero ppm error
PCIe Compliance	Fully compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS jitter specs (≤0.32 ps RMS)
Flexible Output Configuration	Each of four output banks supports independent voltage, format, slew rate, and spread-spectrum settings
Glitchless Frequency Tuning	Pin-controlled or I²C-based frequency increment/decrement in 1 ppm steps without output interruption
Programmable Phase Offset	±45 ns fine phase adjustment per output with <20 ps step accuracy for skew management

Applications

PCIe Gen 4 Switch Timing	Ethernet Switch Clocking
Use Scenario: Providing synchronized 100 MHz reference clocks to multiple PCIe Gen 4 switch ASICs in a data center fabric module. IC Role / Device Role / Timing Role: Quad-output clock generator delivering low-jitter, spread-spectrum-enabled clocks meeting PCIe Gen 4 common clock jitter limits (≤0.45 ps RMS). Use Value: Eliminates need for four discrete oscillators; reduces board area by >60% and simplifies layout with matched trace lengths and deterministic skew control.	Use Scenario: Generating 125 MHz, 156.25 MHz, and 312.5 MHz clocks for 1 GbE/10 GbE PHYs and packet processors in enterprise switches. IC Role / Device Role / Timing Role: Any-frequency synthesizer producing precise Ethernet line rates with independent output voltage per PHY interface (1.8 V for 10GBase-KR, 2.5 V for SGMII). Use Value: Enables single-device support for multi-rate Ethernet PHYs while maintaining sub-1 ps RMS jitter across all outputs.
Broadcast Video Sync	FPGA Processor Clocking
Use Scenario: Delivering SMPTE ST 2082 (27 Gbps) pixel clock and ancillary timing signals (27 MHz, 74.25 MHz, 148.5 MHz) to video encoder/decoder FPGAs in 4K/8K broadcast gear. IC Role / Device Role / Timing Role: High-precision quad clock generator with programmable phase alignment between outputs for genlock and frame synchronization. Use Value: Achieves <100 ps output-to-output skew and ±20 ps phase step resolution-critical for multi-lane video serialization without timing artifacts.	Use Scenario: Supplying core, memory, and peripheral clocks (e.g., 300 MHz DDR4, 200 MHz AXI, 50 MHz configuration) to Xilinx Versal or Intel Agilex FPGAs in AI inference accelerators. IC Role / Device Role / Timing Role: Configurable clock source supporting mixed-voltage FPGA domains (1.2 V core, 1.8 V I/O, 2.5 V memory interface) via independent VDDO supplies. Use Value: Reduces BOM count by consolidating six discrete clock sources into one IC; enables dynamic frequency scaling via I²C during runtime reconfiguration.

PCIe Gen 4 Switch Timing

Ethernet Switch Clocking

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

IC Role / Device Role / Timing Role: Quad-output clock generator delivering low-jitter, spread-spectrum-enabled clocks meeting PCIe Gen 4 common clock jitter limits (≤0.45 ps RMS).

Use Value: Eliminates need for four discrete oscillators; reduces board area by >60% and simplifies layout with matched trace lengths and deterministic skew control.

Use Scenario: Generating 125 MHz, 156.25 MHz, and 312.5 MHz clocks for 1 GbE/10 GbE PHYs and packet processors in enterprise switches.

IC Role / Device Role / Timing Role: Any-frequency synthesizer producing precise Ethernet line rates with independent output voltage per PHY interface (1.8 V for 10GBase-KR, 2.5 V for SGMII).

Use Value: Enables single-device support for multi-rate Ethernet PHYs while maintaining sub-1 ps RMS jitter across all outputs.

Broadcast Video Sync

FPGA Processor Clocking

Use Scenario: Delivering SMPTE ST 2082 (27 Gbps) pixel clock and ancillary timing signals (27 MHz, 74.25 MHz, 148.5 MHz) to video encoder/decoder FPGAs in 4K/8K broadcast gear.

IC Role / Device Role / Timing Role: High-precision quad clock generator with programmable phase alignment between outputs for genlock and frame synchronization.

Use Value: Achieves <100 ps output-to-output skew and ±20 ps phase step resolution-critical for multi-lane video serialization without timing artifacts.

Use Scenario: Supplying core, memory, and peripheral clocks (e.g., 300 MHz DDR4, 200 MHz AXI, 50 MHz configuration) to Xilinx Versal or Intel Agilex FPGAs in AI inference accelerators.

IC Role / Device Role / Timing Role: Configurable clock source supporting mixed-voltage FPGA domains (1.2 V core, 1.8 V I/O, 2.5 V memory interface) via independent VDDO supplies.

Use Value: Reduces BOM count by consolidating six discrete clock sources into one IC; enables dynamic frequency scaling via I²C during runtime reconfiguration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5332A-D06899-GM	Higher integration: 8 outputs, integrated EEPROM, lower jitter (0.35 ps RMS), supports JESD204B deterministic latency	Targeted at JESD204B ADC/DAC timing and multi-ASIC synchronization where deterministic delay matters	Choose when needing >4 outputs, factory pre-programming, or sub-0.4 ps jitter for RF sampling systems
ICS8430I-01T	Fixed-frequency, non-programmable; 4 LVDS outputs; no I²C interface; higher jitter (1.2 ps RMS)	Cost-sensitive, static-clock applications like legacy telecom line cards with fixed 155.52/622.08 MHz requirements	Choose only if design requires zero firmware dependency and tolerates higher jitter and no frequency flexibility

Compared with Si5332A-D06899-GM and ICS8430I-01T, SI5338C-B04853-GMR offers optimal balance of programmability, jitter performance, and footprint-ideal for PCIe Gen 4 and multi-rate Ethernet where field reconfiguration and compact 4×4 mm packaging are critical.

Availability

SI5338C-B04853-GMR is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, Ethernet switch clocking, broadcast video sync, and FPGA processor clocking requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for SI5338C-B04853-GMR 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 leader in analog semiconductors, specializing in RF, timing, and precision analog solutions for communications infrastructure, automotive, and industrial markets.

The Si5338 product line delivers highly configurable, low-jitter clock generation for high-speed serial interfaces-including PCIe, Ethernet, and Fibre Channel-enabling system-level timing consolidation and jitter reduction in space-constrained designs.

FAQ

What is the maximum output frequency supported by SI5338C-B04853-GMR in LVPECL format?

The SI5338C-B04853-GMR supports LVPECL output frequencies up to 710 MHz, as confirmed in Table 6 of the datasheet. This capability applies when using differential outputs with appropriate termination and layout practices to maintain signal integrity and jitter performance below 1 ps RMS.

Does SI5338C-B04853-GMR support PCIe Gen 4 Common Clock compliance?

Yes, SI5338C-B04853-GMR meets PCIe Gen 4 Common Clock jitter requirements with ≤0.45 ps RMS (typical 0.15 ps RMS) over 10 kHz–50 MHz, verified per PCI-Express Base Specification 4.0 rev. 0.5 and measured using the Skyworks PCIe Clock Jitter Tool.

Can SI5338C-B04853-GMR generate different output voltages simultaneously on its four output banks?

Yes, SI5338C-B04853-GMR supports independent output supply voltages per bank: VDDO0 for CLK0A/B, VDDO1 for CLK1A/B, VDDO2 for CLK2A/B, and VDDO3 for CLK3A/B-each configurable for 1.5 V, 1.8 V, 2.5 V, or 3.3 V to match diverse interface voltage requirements.

Is external programming hardware required to configure SI5338C-B04853-GMR?

No, SI5338C-B04853-GMR is configured via its built-in I²C/SMBus interface using Skyworks' ClockBuilder Pro software and a USB-to-I²C adapter. No dedicated programmer is needed-configuration can be performed in-system during development or production programming.

What is the minimum input reference frequency supported by SI5338C-B04853-GMR in PLL bypass mode?

In PLL bypass (clock buffer) mode, SI5338C-B04853-GMR supports input frequencies as low as 1 MHz on single-ended inputs (IN3/IN4), though loss-of-signal detection is only functional above 5 MHz. Differential inputs require ≥5 MHz for full feature operation.

SI5338C-B04853-GMR Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: MultiSynth™

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

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)

SI5338C-B04853-GMR FAQ

1.How can I place an order for SI5338C-B04853-GMR through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5338C-B04853-GMR 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 SI5338C-B04853-GMR reliable?

The price and inventory of SI5338C-B04853-GMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5338C-B04853-GMR is usually 5 days.

3.What payment methods are accepted for SI5338C-B04853-GMR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5338C-B04853-GMR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5338C-B04853-GMR?

SI5338C-B04853-GMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5338C-B04853-GMR 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 SI5338C-B04853-GMR?

For technical support, including SI5338C-B04853-GMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5338C-B04853-GMR requirements.

6.How does Aetrix verify that SI5338C-B04853-GMR is sourced from the original manufacturer or authorized distributors?

All SI5338C-B04853-GMR 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 SI5338C-B04853-GMR meets industry standards.

7.What is the process for return or replacement of SI5338C-B04853-GMR?

All SI5338C-B04853-GMR units undergo pre-shipment inspection (PSI). If there is an issue with SI5338C-B04853-GMR, 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 SI5338C-B04853-GMR part is unused and in its original packaging.

Return procedure for SI5338C-B04853-GMR:

1.Submit a request within 90 days.

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

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