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

Skyworks Solutions Inc. SI5338N-B05577-GMR

Name: SI5338N-B05577-GMR
Brand: Skyworks Solutions Inc.
SKU: SI5338N-B05577-GMR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI5338N-B05577-GMR

Manufacturer:: Skyworks Solutions Inc.

Category:: Application Specific Clock/Timing

Package:: 24-VFQFN Exposed Pad

Datasheet:: SI5338N-B05577-GMR.pdf

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

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Product details

Overview

SI5338N-B05577-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 from 1.8/2.5/3.3 V core supply 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 SI5338N-B05577-GMR datasheet, SI5338N-B05577-GMR pinout, SI5338N-B05577-GMR application, or SI5338N-B05577-GMR equivalent, key selection criteria include its MultiSynth™-based any-frequency synthesis (0.16–710 MHz per output), independent output voltage per driver (1.5–3.3 V), spread-spectrum control, and phase/frequency increment/decrement capability with <20 ps step resolution.

Technical Context

The SI5338N-B05577-GMR implements a two-stage PLL architecture: a high-stability reference stage (input frequency 5–710 MHz) followed by four independent MultiSynth™ fractional-N synthesis blocks, each driving one output channel. Each MultiSynth supports integer or fractional mode with ≤1 ppb frequency resolution and programmable initial phase offset (±45 ns).

It features fully independent output configuration-supporting LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats across four drivers-with separate VDDO supplies (1.4–3.63 V), loss-of-lock and loss-of-signal alarms, and I²C/SMBus interface with register-based control of spread spectrum (0.5–5.0% deviation, 33–63 kHz modulation rate) and glitchless frequency tuning in 1 ppm steps.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count	Four independent clock outputs (CLK0A/B through CLK3A/B)
Phase jitter (RMS)	0.7 ps typical (12 kHz–20 MHz); meets PCIe Gen 3 SRNS & Gen 4 common clock specs
Frequency range	0.16–710 MHz per output; supports >350 MHz on up to two outputs simultaneously (Fvco/4 & Fvco/6)
Input reference	External crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz)
Supply voltages	Core: 1.8/2.5/3.3 V ± tolerance; Output buffers: independently configurable 1.5/1.8/2.5/3.3 V
Package	24-pin QFN, 4 × 4 mm, 0.5 mm pitch, exposed thermal pad
Operating temp.	–40 °C to +85 °C ambient; qualified for industrial and telecom line card environments

Pinout & Package

SI5338N-B05577-GMR is housed in a 24-lead QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are fixed per the Si5338 family and validated for this variant.

Pin/Terminal	Circuit Role	Design Meaning
IN1, IN2, IN5, IN6	Differential input pairs	Accept AC-coupled differential clocks up to 710 MHz; require external 100 Ω termination
IN3, IN4	Single-ended inputs	Support CMOS/SSTL/HSTL signals (5–350 MHz); VIH/VIL referenced to VDD
CLK0A–CLK3B	Differential output pairs	Four independent output channels; each pair (e.g., CLK0A/CLK0B) delivers complementary signals
VDDO0–VDDO3	Output buffer supplies	Independent voltage rails per output driver; set output logic level and drive strength
VDD	Core supply	1.8/2.5/3.3 V core power; PSRR optimized for low-noise clock generation
SCL, SDA	I²C interface	Standard SMBus-compatible 2-wire serial bus for configuration and status monitoring
INTR	Interrupt output	Open-drain alarm signal indicating loss-of-lock or loss-of-signal events
GND, RSVD_GND	Ground connections	Multiple GND pins and reserved ground pad ensure low-impedance return paths and thermal dissipation

Key Features

Feature	Design Value
MultiSynth™ synthesis	Four independent fractional-N synthesizers enabling true zero-ppm accuracy at any output frequency between 0.16–710 MHz
Glitchless frequency tuning	Hardware-supported frequency increment/decrement via dedicated pins (FINC/FDEC) in 1 ppm steps without output interruption
Programmable phase offset	Independent phase adjustment per output with <20 ps step resolution and ±45 ns total range for skew alignment
Spread-spectrum control	Configurable SSC on any output: 0.5–5.0% spread, 33–63 kHz modulation rate, selectable center/down-spread mode
PCIe Gen 4 compliance	Validated RMS jitter ≤0.45 ps (10 kHz–50 MHz) in common-clock topology with 2–5 MHz PLL bandwidth

Applications

PCIe Gen 4 Switch Timing	Ethernet Switch Clocking
Use Scenario: Providing synchronized 100 MHz reference clocks to multiple PCIe Gen 4 switch ICs in a data center fabric. IC Role / Device Role / Timing Role: Quad-output clock generator delivering four identical, low-jitter HCSL clocks with matched propagation delay and phase alignment. Use Value: Enables deterministic link training and maintains Gen 4 eye margin (<0.45 ps RMS jitter) across all lanes without requiring discrete oscillators per port.	Use Scenario: Generating 156.25 MHz and 312.5 MHz clocks for 10GbE PHYs and packet processors in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Frequency translator converting a 25 MHz crystal reference into multiple high-frequency Ethernet-compliant clocks. Use Value: Eliminates need for multiple crystals and reduces BOM count while maintaining IEEE 802.3 jitter compliance (≤1 ps RMS) across all outputs.
Broadcast Video Sync	FPGA-Based Telecom Line Card
Use Scenario: Delivering genlock-capable 27 MHz, 74.25 MHz, and 148.5 MHz clocks to SDI transmitters, video processors, and frame synchronizers in broadcast infrastructure. IC Role / Device Role / Timing Role: Any-frequency clock synthesizer with programmable phase offset for precise inter-device timing alignment. Use Value: Supports SMPTE ST 2059-2 PTP synchronization via sub-20 ps phase step control and zero-ppm frequency accuracy across all outputs.	Use Scenario: Supplying 125 MHz SerDes reference, 100 MHz system clock, and 25 MHz management interface clock to FPGA, DSP, and control MCU on a multi-service access node (MSAN) line card. IC Role / Device Role / Timing Role: Configurable quad clock source supporting mixed-signal domain isolation via independent VDDO supplies. Use Value: Reduces board space and power vs. discrete oscillators while enabling dynamic reconfiguration of clock frequencies during field upgrades.

PCIe Gen 4 Switch Timing

Ethernet Switch Clocking

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

IC Role / Device Role / Timing Role: Quad-output clock generator delivering four identical, low-jitter HCSL clocks with matched propagation delay and phase alignment.

Use Value: Enables deterministic link training and maintains Gen 4 eye margin (<0.45 ps RMS jitter) across all lanes without requiring discrete oscillators per port.

Use Scenario: Generating 156.25 MHz and 312.5 MHz clocks for 10GbE PHYs and packet processors in enterprise Ethernet switches.

IC Role / Device Role / Timing Role: Frequency translator converting a 25 MHz crystal reference into multiple high-frequency Ethernet-compliant clocks.

Use Value: Eliminates need for multiple crystals and reduces BOM count while maintaining IEEE 802.3 jitter compliance (≤1 ps RMS) across all outputs.

Broadcast Video Sync

FPGA-Based Telecom Line Card

Use Scenario: Delivering genlock-capable 27 MHz, 74.25 MHz, and 148.5 MHz clocks to SDI transmitters, video processors, and frame synchronizers in broadcast infrastructure.

IC Role / Device Role / Timing Role: Any-frequency clock synthesizer with programmable phase offset for precise inter-device timing alignment.

Use Value: Supports SMPTE ST 2059-2 PTP synchronization via sub-20 ps phase step control and zero-ppm frequency accuracy across all outputs.

Use Scenario: Supplying 125 MHz SerDes reference, 100 MHz system clock, and 25 MHz management interface clock to FPGA, DSP, and control MCU on a multi-service access node (MSAN) line card.

IC Role / Device Role / Timing Role: Configurable quad clock source supporting mixed-signal domain isolation via independent VDDO supplies.

Use Value: Reduces board space and power vs. discrete oscillators while enabling dynamic reconfiguration of clock frequencies during field upgrades.

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-D05577-GM	Higher integration: includes integrated crystal, lower jitter (0.35 ps RMS), supports up to 10 outputs, but larger 32-QFN package	Preferred where board space allows and ultra-low jitter or crystal integration is required; not drop-in compatible due to pinout and footprint differences	Select when replacing legacy Si5338 designs with tighter jitter budgets or eliminating external crystal placement effort
ICS8430I-01T	Fixed-frequency quad LVDS generator (no I²C programming); 1.2 ps RMS jitter; 3.3 V only; 32-TQFP package	Limited to pre-defined frequencies; no spread spectrum or phase tuning; suited for cost-sensitive, static-clock applications	Choose for high-volume, non-reconfigurable systems where programmability is unnecessary and TQFP assembly is preferred

Compared with Si5332A-D05577-GM and ICS8430I-01T, SI5338N-B05577-GMR offers the optimal balance of field-programmability, jitter performance, and compact 24-QFN footprint-making it ideal for PCIe, Ethernet, and FPGA timing where design flexibility and space constraints coexist.

Availability

SI5338N-B05577-GMR is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, 10GbE switch clocking, and FPGA-based telecom line card applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SI5338N-B05577-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 semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, broadband, automotive, and industrial markets.

The Si5338 product line was designed as a programmable, low-jitter clock generator family targeting high-speed serial interface timing-including PCIe, Ethernet, Fibre Channel, and broadcast video-where flexible frequency synthesis and tight phase noise are critical.

FAQ

What is the primary function of the SI5338N-B05577-GMR in a system?

The SI5338N-B05577-GMR serves as an I²C-programmable quad clock generator that synthesizes up to four independent, low-jitter output clocks from a single reference input. Its core function is to replace multiple discrete oscillators in high-speed digital systems-such as PCIe switches, Ethernet routers, and FPGA-based telecom equipment-while enabling precise frequency, phase, and format configuration per output channel. The SI5338N-B05577-GMR achieves this using Skyworks' patented MultiSynth™ technology and supports PCIe Gen 1–4, SRNS, and broadcast video timing standards.

Does the SI5338N-B05577-GMR support spread-spectrum clocking (SSC)?

Yes, the SI5338N-B05577-GMR supports fully configurable spread-spectrum clocking on any individual output. It allows selection of spread percentage (0.5–5.0%), modulation rate (33–63 kHz), and spread direction (center or down-spread). This feature is implemented digitally within the MultiSynth™ block and does not require external components. The SI5338N-B05577-GMR's SSC capability helps reduce electromagnetic interference (EMI) in dense PCB layouts-particularly beneficial in PCIe and USB 3.x applications-while maintaining full frequency and phase programmability.

Can the SI5338N-B05577-GMR generate different output formats simultaneously?

Yes, the SI5338N-B05577-GMR supports simultaneous mixed-format outputs: for example, LVDS on CLK0, HCSL on CLK1, CMOS on CLK2, and SSTL on CLK3-all operating at different frequencies and voltages. Each output driver is independently configurable for signal format (LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL), output voltage (1.5–3.3 V), and termination. This capability eliminates level-shifting components and simplifies timing architecture in heterogeneous SoC/FPGA systems. The SI5338N-B05577-GMR's per-driver VDDO pins enable strict domain isolation between output banks.

What is the minimum and maximum output frequency supported by the SI5338N-B05577-GMR?

The SI5338N-B05577-GMR supports output frequencies from 0.16 MHz to 710 MHz, depending on format: LVPECL/LVDS/CML up to 710 MHz (with limitations above 350 MHz), HCSL up to 250 MHz, CMOS up to 200 MHz, and SSTL/HSTL up to 350 MHz. Frequencies above 350 MHz are restricted to two unique values simultaneously (Fvco/4 and Fvco/6) due to internal VCO architecture. All outputs maintain 0 ppm frequency accuracy and ≤0.7 ps RMS jitter at 125 MHz under typical conditions. The SI5338N-B05577-GMR's wide range enables direct replacement of legacy oscillators across compute, networking, and video domains.

How is the SI5338N-B05577-GMR programmed and configured?

The SI5338N-B05577-GMR is configured via its I²C/SMBus-compatible 2-wire serial interface (SCL/SDA pins), supporting standard-mode (100 kHz) and fast-mode (400 kHz) operation. Configuration is typically performed using Skyworks' ClockBuilder Pro software, which generates custom configuration files (.cbs) and registers maps. The device also supports hardware pin control for real-time frequency/phase adjustments (FINC/FDEC/OEB pins) and includes non-volatile memory (OTP) to store factory or user-defined settings. The SI5338N-B05577-GMR retains its configuration across power cycles without requiring external EEPROM or host intervention.

SI5338N-B05577-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)

SI5338N-B05577-GMR FAQ

1.How can I place an order for SI5338N-B05577-GMR through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5338N-B05577-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 SI5338N-B05577-GMR reliable?

The price and inventory of SI5338N-B05577-GMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5338N-B05577-GMR is usually 5 days.

3.What payment methods are accepted for SI5338N-B05577-GMR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5338N-B05577-GMR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5338N-B05577-GMR?

SI5338N-B05577-GMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5338N-B05577-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 SI5338N-B05577-GMR?

For technical support, including SI5338N-B05577-GMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5338N-B05577-GMR requirements.

6.How does Aetrix verify that SI5338N-B05577-GMR is sourced from the original manufacturer or authorized distributors?

All SI5338N-B05577-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 SI5338N-B05577-GMR meets industry standards.

7.What is the process for return or replacement of SI5338N-B05577-GMR?

All SI5338N-B05577-GMR units undergo pre-shipment inspection (PSI). If there is an issue with SI5338N-B05577-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 SI5338N-B05577-GMR part is unused and in its original packaging.

Return procedure for SI5338N-B05577-GMR:

1.Submit a request within 90 days.

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

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