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

Skyworks Solutions Inc. SI5338P-B05542-GM

Name: SI5338P-B05542-GM
Brand: Skyworks Solutions Inc.
SKU: SI5338P-B05542-GM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI5338P-B05542-GM

Manufacturer:: Skyworks Solutions Inc.

Category:: Application Specific Clock/Timing

Package:: 24-VFQFN Exposed Pad

Datasheet:: SI5338P-B05542-GM.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI5338P-B05542-GM from Skyworks Solutions is a quad-output, I²C-programmable clock generator with MultiSynth™ frequency synthesis. It delivers four independent, any-frequency outputs (0.16–710 MHz), supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats, achieves 0.7 ps RMS phase jitter (typ), and operates from 1.8/2.5/3.3 V core supply in PCIe Gen 1–4 timing applications.

For engineers reviewing the SI5338P-B05542-GM datasheet, SI5338P-B05542-GM pinout, SI5338P-B05542-GM application, or SI5338P-B05542-GM equivalent, this page provides verified specifications, validated pin functions, confirmed PCIe Gen 4 SRNS compliance, real-world output format flexibility, and alternative selection guidance for high-precision clocking in FPGA, Ethernet, and telecom systems.

Technical Context

The SI5338P-B05542-GM implements a two-stage PLL architecture: a high-stability input stage locking to external crystal (8–30 MHz) or differential/CMOS references (5–710 MHz), followed by four independent MultiSynth™ fractional-N synthesizers per output channel. Each synthesizer supports integer or fractional mode operation with <1 ppb frequency resolution.

Its output stage features fully configurable drivers-each with independent voltage (1.5/1.8/2.5/3.3 V), format, spread-spectrum control (0.5–5.0% down-spread), phase offset (±45 ns), and glitchless frequency increment/decrement (1 ppm steps). Loss-of-lock and loss-of-signal alarms are integrated for system monitoring.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count & type	Four differential clock outputs (CLK0A/B through CLK3A/B); supports up to eight single-ended or mixed-mode outputs
Frequency range	0.16–710 MHz per output; includes PCIe Gen 4 Common Clock (100 MHz) and SRNS modes
Phase jitter (RMS)	0.7 ps (typ) over 12 kHz–20 MHz; meets PCIe Gen 3/4, OC-12, and GbE jitter requirements
Supply voltage	Core: 1.8/2.5/3.3 V ±10%; output buffers: independently configurable 1.4–3.63 V
Input reference	Crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz)
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 line card environments

Pinout & Package

SI5338P-B05542-GM uses a 24-pin QFN package (4 × 4 mm, 0.5 mm pitch) with an exposed thermal pad. Pin assignments follow the standard Si5338 top-view layout.

Pin/Terminal	Circuit Role	Design Meaning
IN1, IN2	Differential input pair	Accepts 5–710 MHz AC-coupled differential clock; requires external 100 Ω termination
IN3, IN4	Single-ended input pair	Supports 5–200 MHz CMOS-level clocks; VIH = 0.7×VDD, VIL = 0.3×VDD
CLK0A, CLK0B – CLK3A, CLK3B	Differential output pairs	Four independent outputs; each configurable for LVPECL/LVDS/HCSL/CML/SSTL/HSTL
VDDO0–VDDO3	Output buffer supplies	Independent 1.4–3.63 V rails per output bank; enables mixed-voltage signaling
VDD	Core supply	1.8/2.5/3.3 V ±10%; powers PLL, synthesizers, and control logic
SCL, SDA	I²C interface	SMBus-compatible serial programming interface (up to 400 kHz)
INTR	Interrupt output	Open-drain status indicator for loss-of-lock or loss-of-signal events
GND, RSVD_GND	Ground terminals	Eight dedicated ground pins plus reserved ground pad; critical for low-jitter performance

Key Features

Feature	Design Value
MultiSynth™ synthesis	Four independent fractional-N synthesizers enabling true zero-ppm accuracy on all outputs
Glitchless frequency tuning	1 ppm step size with pin-controlled increment/decrement; update time ≤667 ns above 18 MHz
Programmable phase offset	±45 ns adjustment per output with <20 ps step resolution for skew management
Spread spectrum support	Configurable on any output: 5–350 MHz range, 0.5–5.0% spread, 33–63 kHz modulation rate
PCIe Gen 4 compliance	Meets SRNS jitter spec (0.11–0.32 ps RMS) and Common Clock jitter (0.15–0.45 ps RMS)

Applications

PCIe Gen 4 Server Backplane	Ethernet Switch Timing
Use Scenario: High-speed server motherboard requiring synchronized 100 MHz reference clocks for CPU, GPU, and NVMe controllers with strict Gen 4 SRNS jitter limits. IC Role / Device Role / Timing Role: Primary clock generator providing four independent, low-jitter PCIe reference clocks with programmable phase alignment across slots. Use Value: Eliminates need for multiple discrete oscillators; ensures sub-0.32 ps RMS jitter compliance without external filtering or reclocking.	Use Scenario: 10 GbE/25 GbE switch ASIC requiring multiple synchronized clocks (125 MHz, 156.25 MHz, 312.5 MHz) with tight inter-channel skew. IC Role / Device Role / Timing Role: Quad-output clock source delivering precisely phased clocks to SERDES lanes, MAC, and PHY blocks. Use Value: Enables deterministic latency via programmable phase offset (<20 ps steps) and maintains <100 ps output-to-output skew across frequencies.
Broadcast Video Master Clock	FPGA-Based Telecom Line Card
Use Scenario: SMPTE ST 2059-2 compliant video timing system needing stable 27 MHz, 74.25 MHz, and 148.5 MHz clocks with ultra-low jitter for pixel-accurate synchronization. IC Role / Device Role / Timing Role: Any-frequency clock synthesizer generating broadcast-grade reference clocks from a single 25 MHz crystal input. Use Value: Achieves 0.7 ps RMS jitter (typ), meeting ITU-R BT.709 and SMPTE ST 2059-2 requirements without external jitter cleaners.	Use Scenario: OTN/SDH line card with FPGA, DSP, and framer ICs requiring diverse clocks (19.44 MHz, 155.52 MHz, 622.08 MHz) and loss-of-signal monitoring. IC Role / Device Role / Timing Role: Configurable clock hub supporting both synchronous translation and free-running generation with alarm reporting. Use Value: Reduces BOM count by replacing four oscillators; integrates LOS/LOL detection to trigger failover without host processor intervention.

PCIe Gen 4 Server Backplane

Ethernet Switch Timing

Use Scenario: High-speed server motherboard requiring synchronized 100 MHz reference clocks for CPU, GPU, and NVMe controllers with strict Gen 4 SRNS jitter limits.

IC Role / Device Role / Timing Role: Primary clock generator providing four independent, low-jitter PCIe reference clocks with programmable phase alignment across slots.

Use Value: Eliminates need for multiple discrete oscillators; ensures sub-0.32 ps RMS jitter compliance without external filtering or reclocking.

Use Scenario: 10 GbE/25 GbE switch ASIC requiring multiple synchronized clocks (125 MHz, 156.25 MHz, 312.5 MHz) with tight inter-channel skew.

IC Role / Device Role / Timing Role: Quad-output clock source delivering precisely phased clocks to SERDES lanes, MAC, and PHY blocks.

Use Value: Enables deterministic latency via programmable phase offset (<20 ps steps) and maintains <100 ps output-to-output skew across frequencies.

Broadcast Video Master Clock

FPGA-Based Telecom Line Card

Use Scenario: SMPTE ST 2059-2 compliant video timing system needing stable 27 MHz, 74.25 MHz, and 148.5 MHz clocks with ultra-low jitter for pixel-accurate synchronization.

IC Role / Device Role / Timing Role: Any-frequency clock synthesizer generating broadcast-grade reference clocks from a single 25 MHz crystal input.

Use Value: Achieves 0.7 ps RMS jitter (typ), meeting ITU-R BT.709 and SMPTE ST 2059-2 requirements without external jitter cleaners.

Use Scenario: OTN/SDH line card with FPGA, DSP, and framer ICs requiring diverse clocks (19.44 MHz, 155.52 MHz, 622.08 MHz) and loss-of-signal monitoring.

IC Role / Device Role / Timing Role: Configurable clock hub supporting both synchronous translation and free-running generation with alarm reporting.

Use Value: Reduces BOM count by replacing four oscillators; integrates LOS/LOL detection to trigger failover without host processor intervention.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5332A-D05542-GM	Higher integration: 8 outputs, dual-loop architecture, lower jitter (0.35 ps RMS), supports JESD204B deterministic latency	Targeted at JESD204B ADC/DAC systems and multi-ASIC synchronization where deterministic delay matters	Choose when >4 outputs, sub-0.4 ps jitter, or JESD204B deterministic latency is required; not drop-in compatible
ICS8430I-01T	Fixed-frequency quad LVDS generator; no I²C programming; 1.2 ps RMS jitter; 2.5 V only; 32-pin TQFP	Cost-sensitive, static-clock applications like legacy telecom or industrial control with fixed 100/125 MHz outputs	Choose for simple, unprogrammable clock fanout where frequency flexibility is unnecessary and PCB space allows larger TQFP

Compared with Si5332A-D05542-GM and ICS8430I-01T, the SI5338P-B05542-GM offers optimal balance of programmability, jitter performance, and footprint for PCIe Gen 4 and Ethernet switch designs - supporting full I²C configuration while fitting into compact 4×4 mm layouts where higher-output or fixed-frequency alternatives add cost or size overhead.

Availability

SI5338P-B05542-GM is available at Aetrix Electronics and suitable for PCIe Gen 4 server backplanes, 10/25 GbE switch timing, broadcast video master clocks, and FPGA-based telecom line cards requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SI5338P-B05542-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 infrastructure, automotive, and mobile markets.

The Si5338 product line was designed for high-density, multi-protocol timing consolidation in networking, computing, and communications equipment - enabling replacement of multiple discrete oscillators with a single programmable, low-jitter clock generator.

FAQ

What is the primary function of the SI5338P-B05542-GM in a PCIe Gen 4 system?

The SI5338P-B05542-GM serves as a quad-output clock generator that delivers four independent, low-jitter 100 MHz reference clocks compliant with PCIe Gen 4 Separate Reference No Spread (SRNS) specifications. It replaces multiple discrete oscillators and ensures each slot or device receives a synchronized, sub-0.32 ps RMS jitter clock directly from a single IC, simplifying board layout and improving timing margin.

Does the SI5338P-B05542-GM support spread-spectrum clocking (SSC), and how is it configured?

Yes, the SI5338P-B05542-GM supports spread-spectrum clocking on any output with programmable parameters: spread range (0.5–5.0%), modulation rate (33–63 kHz), and center frequency (5–350 MHz). Configuration is performed via I²C register writes using ClockBuilder Pro software or direct register access - no external components are required.

Can the SI5338P-B05542-GM generate different output formats simultaneously, such as LVDS and HCSL?

Yes, the SI5338P-B05542-GM supports mixed output formats across its four differential outputs. Each output pair (CLK0A/B through CLK3A/B) can be independently configured for LVDS, LVPECL, HCSL, CML, SSTL, or HSTL, with corresponding VDDOx supply voltages set per bank - enabling direct interfacing with diverse ASICs, FPGAs, and PHYs on the same board.

What is the minimum input reference frequency supported by the SI5338P-B05542-GM in PLL bypass mode?

In PLL bypass (clock buffer) mode, the SI5338P-B05542-GM supports input frequencies as low as 1 MHz on single-ended inputs (IN3/IN4) and 5 MHz on differential inputs (IN1/IN2, IN5/IN6). However, loss-of-signal detection is only functional above 5 MHz - below that threshold, the INTR pin will not assert LOS.

How does the SI5338P-B05542-GM handle power supply noise rejection?

The SI5338P-B05542-GM features excellent PSRR across its 1.8/2.5/3.3 V core supply range, minimizing sensitivity to rail noise. Its architecture isolates sensitive PLL and VCO circuitry from digital I/O domains, and the separate VDDOx supplies decouple output driver noise from the core - enabling stable operation even with moderate supply ripple in dense PCB environments.

SI5338P-B05542-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)

SI5338P-B05542-GM FAQ

1.How can I place an order for SI5338P-B05542-GM through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5338P-B05542-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 SI5338P-B05542-GM reliable?

The price and inventory of SI5338P-B05542-GM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5338P-B05542-GM is usually 5 days.

3.What payment methods are accepted for SI5338P-B05542-GM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5338P-B05542-GM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5338P-B05542-GM?

SI5338P-B05542-GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5338P-B05542-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 SI5338P-B05542-GM?

For technical support, including SI5338P-B05542-GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5338P-B05542-GM requirements.

6.How does Aetrix verify that SI5338P-B05542-GM is sourced from the original manufacturer or authorized distributors?

All SI5338P-B05542-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 SI5338P-B05542-GM meets industry standards.

7.What is the process for return or replacement of SI5338P-B05542-GM?

All SI5338P-B05542-GM units undergo pre-shipment inspection (PSI). If there is an issue with SI5338P-B05542-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 SI5338P-B05542-GM part is unused and in its original packaging.

Return procedure for SI5338P-B05542-GM:

1.Submit a request within 90 days.

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

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