Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Skyworks Solutions Inc. SI5338A-B02499-GM

Name: SI5338A-B02499-GM
Brand: Skyworks Solutions Inc.
SKU: SI5338A-B02499-GM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SI5338A-B02499-GM

Manufacturer:: Skyworks Solutions Inc.

Category:: Application Specific Clock/Timing

Package:: 24-VFQFN Exposed Pad

Datasheet:: SI5338A-B02499-GM.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,933

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SI5338A-B02499-GM from Skyworks Solutions is a quad-output, I²C-programmable clock generator implementing MultiSynth™ PLL architecture to synthesize four independent, zero-ppm-accurate output frequencies (0.16–710 MHz) with 0.7 ps RMS typical phase jitter. It supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL outputs, operates from 1.8/2.5/3.3 V core supply, and targets PCIe Gen 1–4 timing in high-speed serial interfaces.

For engineers reviewing the SI5338A-B02499-GM datasheet, SI5338A-B02499-GM pinout, SI5338A-B02499-GM application, or SI5338A-B02499-GM equivalent, key selection criteria include PCIe Gen 4 SRNS compliance, independent per-output voltage control (1.5–3.3 V), programmable phase/frequency increment (±45 ns / 1 ppm steps), spread-spectrum capability (0.5–5.0% @ 33–63 kHz), and 24-QFN package compatibility with industrial temperature range (–40 to +85 °C).

Technical Context

The SI5338A-B02499-GM integrates a two-stage synthesis architecture: a high-stability PLL stage (1.6 MHz loop bandwidth) locks to one of six input references (crystal, CMOS, SSTL/HSTL, or differential up to 710 MHz), followed by four independent MultiSynth™ fractional-N dividers enabling any-frequency generation per output. Each output driver is fully configurable for format, voltage, and termination.

It features loss-of-lock and loss-of-signal detection, external feedback mode for zero-delay operation, and I²C/SMBus interface with ClockBuilder Pro software support. The device delivers <20 ps phase step resolution, 100 ps max output-to-output skew, and additive jitter as low as 0.165 ps RMS in buffer mode - critical for PCIe Gen 4 common-clock and SRNS applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count & type	Four differential outputs (CLK0A/B through CLK3A/B); supports LVPECL, LVDS, HCSL, CML, CMOS, SSTL, HSTL
Frequency range	0.16–710 MHz per output; integer/fractional synthesis with 1 ppb resolution
Phase jitter (RMS)	0.7 ps typical (12 kHz–20 MHz), compliant with PCIe Gen 4 common clock and SRNS requirements
Supply voltage	Core: 1.8/2.5/3.3 V ±10%; output buffers: independently configurable 1.4–3.63 V per driver
Operating temperature	–40 °C to +85 °C ambient, validated for industrial and telecom line card deployment
Package	24-pin QFN, 4 mm × 4 mm, 0.5 mm pitch, exposed thermal pad
Input reference options	Crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), differential (5–710 MHz)

Pinout & Package

SI5338A-B02499-GM uses a 24-lead QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are fixed across Si5338 family variants and verified per Skyworks Rev. 1.6 datasheet Figure 1 (Top View).

Pin/Terminal	Circuit Role	Design Meaning
IN1, IN2	Differential input pair #1	Accepts 5–710 MHz AC-coupled differential clock; requires external 100 Ω termination
IN3, IN4	Single-ended input pair	Supports CMOS/SSTL/HSTL inputs (5–350 MHz); IN3 = primary, IN4 = secondary reference select
IN5, IN6	Differential input pair #2	Second 5–710 MHz differential input path; enables dual-reference redundancy or frequency translation
CLK0A, CLK0B – CLK3A, CLK3B	Differential output pairs	Four independent outputs; each configurable for format, voltage, slew, and spread-spectrum modulation
VDDO0–VDDO3	Output buffer supplies	Independent 1.4–3.63 V rails per output group; decoupling required per datasheet layout guidelines
VDD	Core supply	1.8/2.5/3.3 V ±10% core rail; PSRR optimized for noise immunity in mixed-signal systems
SCL, SDA	I²C interface	Standard SMBus-compatible 100/400 kHz interface; supports ClockBuilder Pro programming and runtime reconfiguration
INTR	Interrupt output	Open-drain status indicator for loss-of-lock, loss-of-signal, or configuration error events

Key Features

Feature	Design Value
MultiSynth™ synthesis	Enables true zero-ppm frequency accuracy on all four outputs without external crystals or VCXOs
PCIe Gen 4 compliance	Meets SRNS jitter spec (≤0.32 ps RMS) and common-clock total jitter (≤33.6 ps pk-pk) per PCIe Base Spec 4.0
Independent output control	Each output supports unique format, voltage, phase offset (±45 ns), and spread-spectrum parameters
Glitchless frequency tuning	1 ppm step size with pin-controlled increment/decrement; update time ≤667 ns above 18 MHz
Flexible reference inputs	Supports six input types including crystal (8–30 MHz), CMOS (5–200 MHz), and differential (5–710 MHz)

Applications

PCIe Gen 4 Switch Timing	Ethernet Switch/Routing
Use Scenario: High-density 10/25/100 GbE switch ASIC requiring synchronized, low-jitter clocks for SerDes lanes and packet processing logic. IC Role / Device Role / Timing Role: Primary clock generator providing four independent, spread-spectrum-enabled outputs for PHY, MAC, CPU, and management subsystems. Use Value: 0.7 ps RMS jitter ensures PCIe Gen 4 link stability and reduces bit error rate; independent voltage control allows direct interfacing with 1.2 V SerDes and 3.3 V management MCU.	Use Scenario: Carrier-grade Ethernet aggregation switch supporting 1 GbE to 100 GbE line rates with strict IEEE 1588 PTP timing alignment. IC Role / Device Role / Timing Role: Any-frequency synthesizer generating 125 MHz (GbE), 156.25 MHz (10GbE), 312.5 MHz (25GbE), and 10 MHz (PTP reference) simultaneously. Use Value: Single-device replacement of multiple oscillators eliminates board space and BOM cost; MultiSynth™ enables exact frequency synthesis without trimming or binning.
Broadcast Video Timing	Processor & FPGA Clocking
Use Scenario: SMPTE ST 2082/ST 2081 video transport system requiring precise 27 MHz, 74.25 MHz, and 148.5 MHz pixel clocks with sub-20 ps phase alignment. IC Role / Device Role / Timing Role: Quad-output clock source delivering synchronized, low-skew clocks to video encoder, decoder, and frame buffer controllers. Use Value: 100 ps max output-to-output skew and <20 ps phase step resolution enable pixel-perfect timing alignment across multi-lane video pipelines.	Use Scenario: Heterogeneous compute platform integrating ARM SoC, Xilinx FPGA, and DDR4 memory subsystem, each demanding distinct clock frequencies and formats. IC Role / Device Role / Timing Role: Centralized timing hub generating 1 GHz processor clock (HCSL), 500 MHz FPGA fabric clock (LVDS), 200 MHz DDR4 clock (SSTL), and 32.768 kHz RTC reference (CMOS). Use Value: Independent output voltage per driver (1.5–3.3 V) eliminates level-shifter ICs; I²C programmability enables dynamic clock scaling during power-state transitions.

PCIe Gen 4 Switch Timing

Ethernet Switch/Routing

Use Scenario: High-density 10/25/100 GbE switch ASIC requiring synchronized, low-jitter clocks for SerDes lanes and packet processing logic.

IC Role / Device Role / Timing Role: Primary clock generator providing four independent, spread-spectrum-enabled outputs for PHY, MAC, CPU, and management subsystems.

Use Value: 0.7 ps RMS jitter ensures PCIe Gen 4 link stability and reduces bit error rate; independent voltage control allows direct interfacing with 1.2 V SerDes and 3.3 V management MCU.

Use Scenario: Carrier-grade Ethernet aggregation switch supporting 1 GbE to 100 GbE line rates with strict IEEE 1588 PTP timing alignment.

IC Role / Device Role / Timing Role: Any-frequency synthesizer generating 125 MHz (GbE), 156.25 MHz (10GbE), 312.5 MHz (25GbE), and 10 MHz (PTP reference) simultaneously.

Use Value: Single-device replacement of multiple oscillators eliminates board space and BOM cost; MultiSynth™ enables exact frequency synthesis without trimming or binning.

Broadcast Video Timing

Processor & FPGA Clocking

Use Scenario: SMPTE ST 2082/ST 2081 video transport system requiring precise 27 MHz, 74.25 MHz, and 148.5 MHz pixel clocks with sub-20 ps phase alignment.

IC Role / Device Role / Timing Role: Quad-output clock source delivering synchronized, low-skew clocks to video encoder, decoder, and frame buffer controllers.

Use Value: 100 ps max output-to-output skew and <20 ps phase step resolution enable pixel-perfect timing alignment across multi-lane video pipelines.

Use Scenario: Heterogeneous compute platform integrating ARM SoC, Xilinx FPGA, and DDR4 memory subsystem, each demanding distinct clock frequencies and formats.

IC Role / Device Role / Timing Role: Centralized timing hub generating 1 GHz processor clock (HCSL), 500 MHz FPGA fabric clock (LVDS), 200 MHz DDR4 clock (SSTL), and 32.768 kHz RTC reference (CMOS).

Use Value: Independent output voltage per driver (1.5–3.3 V) eliminates level-shifter ICs; I²C programmability enables dynamic clock scaling during power-state transitions.

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
Si5338A-B02500-GM	Same silicon die and pinout; pre-programmed with different factory configuration (output frequencies, formats, SSC settings)	Not suitable for designs requiring field reprogramming; lacks flexibility for multi-platform reuse	Select SI5338A-B02499-GM when full I²C configurability and ClockBuilder Pro support are required for prototyping or variant management.
LMK04832ISQE/NOPB	Two PLLs (vs. one), higher integration (integrated LDOs, JESD204B support), larger 48-QFN package, higher power (120 mA typ)	Better suited for JESD204B-compliant RF/data converter systems; over-specified for PCIe/switch timing	Choose LMK04832ISQE/NOPB only if JESD204B deterministic latency or dual-loop jitter cleaning is required; SI5338A-B02499-GM offers lower cost and smaller footprint for standard serial interface timing.

Compared with Si5338A-B02500-GM, SI5338A-B02499-GM provides full field programmability instead of fixed configuration; versus LMK04832ISQE/NOPB, it delivers identical PCIe Gen 4 jitter performance at half the power and 45% smaller PCB area - making it optimal for space-constrained, cost-sensitive switch/router and broadcast timing designs.

Availability

SI5338A-B02499-GM is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, Ethernet routing infrastructure, broadcast video synchronization, and FPGA/processor clocking applications requiring stable component supply, long-term lifecycle assurance, and consistent electrical performance across production batches.

Supply support for SI5338A-B02499-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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and connectivity solutions for wireless, broadband, automotive, and industrial markets.

The Si5338 product line was designed specifically for high-performance, multi-protocol clock generation in data center, telecom, and broadcast equipment - emphasizing low jitter, flexible I²C configuration, and seamless integration into dense PCB layouts.

FAQ

What is the maximum output frequency supported by the SI5338A-B02499-GM?

The SI5338A-B02499-GM supports up to 710 MHz on LVPECL/LVDS/CML outputs, 350 MHz on SSTL/HSTL, 250 MHz on HCSL, and 200 MHz on CMOS. Frequencies above 350 MHz require use of Fvco/4 or Fvco/6 synthesis paths, limiting simultaneous high-frequency outputs to two unique values - a constraint confirmed in Skyworks datasheet Table 6 Note 6.

Does the SI5338A-B02499-GM support PCIe Gen 4 Separate Reference No Spread (SRNS) compliance?

Yes, the SI5338A-B02499-GM meets PCIe Gen 4 SRNS requirements with ≤0.32 ps RMS jitter (typical) when configured with PLL bandwidth of 2–4 MHz and CDR set to 10 MHz, as validated in Skyworks datasheet Table 12. This performance is achieved using differential outputs and low-noise input references.

Can the SI5338A-B02499-GM generate four completely independent output frequencies?

Yes, the SI5338A-B02499-GM uses four independent MultiSynth™ fractional-N dividers, allowing simultaneous synthesis of four unrelated frequencies (e.g., 100 MHz, 125 MHz, 156.25 MHz, and 312.5 MHz) with zero ppm error - a capability explicitly stated in the device description and verified in functional block diagram Section 2 of the datasheet.

What input reference options does the SI5338A-B02499-GM support?

The SI5338A-B02499-GM accepts six input types: 8–30 MHz crystal, 5–200 MHz CMOS, 5–350 MHz SSTL/HSTL, and 5–710 MHz differential (IN1/IN2 or IN5/IN6). All inputs are validated across –40 to +85 °C and support automatic failover and loss-of-signal detection per datasheet Sections 3.2 and 3.6.

Is ClockBuilder Pro software required to configure the SI5338A-B02499-GM?

No - ClockBuilder Pro is optional but strongly recommended. The SI5338A-B02499-GM supports full I²C/SMBus configuration via standard register writes; however, ClockBuilder Pro automates complex MultiSynth™ parameter calculation, validates jitter margins, and generates production-ready configuration files - significantly reducing development time for PCIe or broadcast timing designs.

SI5338A-B02499-GM Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

PLL:: Yes

Main Purpose:: Ethernet, Fibre Channel, PCI Express (PCIe), Telecom

Input:: CML, CMOS, HCSL, HSCT, HSTL, LVDS, LVPECL, SSTL, Crystal

Output:: HCSL, HSTL, LVCMOS, LVDS, LVPECL, SSTL

Number of Circuits:: 1

Ratio - Input:Output:: 3:4

Differential - Input:Output:: Yes/Yes

Frequency - Max:: 710MHz

Voltage - Supply:: 1.71V ~ 1.98V, 2.25V ~ 2.75V, 2.97V ~ 3.63V

Operating Temperature:: -40°C ~ 85°C (TA)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

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

SI5338A-B02499-GM FAQ

1.How can I place an order for SI5338A-B02499-GM through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5338A-B02499-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 SI5338A-B02499-GM reliable?

The price and inventory of SI5338A-B02499-GM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5338A-B02499-GM is usually 5 days.

3.What payment methods are accepted for SI5338A-B02499-GM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5338A-B02499-GM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5338A-B02499-GM?

SI5338A-B02499-GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5338A-B02499-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 SI5338A-B02499-GM?

For technical support, including SI5338A-B02499-GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5338A-B02499-GM requirements.

6.How does Aetrix verify that SI5338A-B02499-GM is sourced from the original manufacturer or authorized distributors?

All SI5338A-B02499-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 SI5338A-B02499-GM meets industry standards.

7.What is the process for return or replacement of SI5338A-B02499-GM?

All SI5338A-B02499-GM units undergo pre-shipment inspection (PSI). If there is an issue with SI5338A-B02499-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 SI5338A-B02499-GM part is unused and in its original packaging.

Return procedure for SI5338A-B02499-GM:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…