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. SI5338M-B05142-GMR

Name: SI5338M-B05142-GMR
Brand: Skyworks Solutions Inc.
SKU: SI5338M-B05142-GMR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SI5338M-B05142-GMR

Manufacturer:: Skyworks Solutions Inc.

Category:: Application Specific Clock/Timing

Package:: 24-VFQFN Exposed Pad

Datasheet:: SI5338M-B05142-GMR.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,380

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

Product details

Overview

SI5338M-B05142-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. It replaces up to four crystal oscillators in high-speed serial interface timing applications.

For engineers reviewing the SI5338M-B05142-GMR datasheet, SI5338M-B05142-GMR pinout, SI5338M-B05142-GMR application, or SI5338M-B05142-GMR equivalent, key selection factors include its MultiSynth™-based any-frequency synthesis (0.16–710 MHz per output), independent output voltage control (1.5/1.8/2.5/3.3 V), spread-spectrum capability (0.5–5.0% down-spread), and 24-pin 4×4 mm QFN package with I²C/SMBus programming interface.

Technical Context

The SI5338M-B05142-GMR implements a two-stage PLL architecture: a high-stability reference stage followed by four independent MultiSynth™ fractional-N synthesizers, each driving a configurable output buffer. Input flexibility includes external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz) references.

Each output supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with independent supply voltage per driver, programmable phase offset (±45 ns, <20 ps step), and glitchless frequency increment/decrement (1 ppm steps). The device operates from a single 1.8/2.5/3.3 V core supply and delivers 45 mA typical core current at full load.

Key Specifications

Parameter	Value and Actual Design Meaning
Phase Jitter (RMS)	0.7 ps - meets PCIe Gen 3 SRNS and GbE jitter requirements for clean high-speed serial link timing
Output Frequency Range	0.16–710 MHz - covers PCIe reference clocks (100 MHz), Ethernet (125 MHz), Fibre Channel (155.52/311.04 MHz), and processor/FPGA clocks
Input Reference Support	Crystal (8–30 MHz), CMOS (5–200 MHz), differential (5–710 MHz) - enables flexible system-level clock tree design without external buffers
Output Format Flexibility	LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL - allows direct interfacing to diverse logic families without level-shifting components
Supply Voltage Options	VDD = 1.8/2.5/3.3 V; VDDOx = 1.5/1.8/2.5/3.3 V - supports mixed-voltage SoC/FPGA platforms with independent I/O domain control
Package	24-pin QFN, 4 × 4 mm - space-efficient footprint compatible with high-density PCB layouts and automated assembly
Operating Temperature	–40 to +85 °C - qualified for industrial and telecom line card environments with no derating required

Pinout & Package

SI5338M-B05142-GMR is housed in a 24-lead, 4 × 4 mm QFN package with exposed thermal pad. Pin assignments are fixed per Skyworks Si5338 family specification and validated for this variant.

Pin/Terminal	Circuit Role	Design Meaning
IN1, IN2, IN5, IN6	Differential input pairs	Accept 5–710 MHz AC-coupled differential clocks; require external 100 Ω termination
IN3, IN4	Single-ended CMOS inputs	Support 5–200 MHz DC-coupled clocks; VIH/VIL referenced to VDD
CLK0A/CLK0B to CLK3A/CLK3B	Differential output pairs	Four independent output drivers; each configurable for LVPECL/LVDS/HCSL/CML with dedicated VDDOx supply
VDDO0–VDDO3	Output buffer supplies	Independent 1.5/1.8/2.5/3.3 V rails per output bank - enables mixed-signal I/O voltage domains
VDD	Core supply	Single 1.8/2.5/3.3 V supply powering PLL, MultiSynth, and control logic
SCL, SDA	I²C interface	SMBus-compatible 100 kHz / 400 kHz interface for configuration and status monitoring
INTR	Interrupt output	Open-drain signal indicating loss-of-lock or loss-of-signal events
RSVD_GND	Reserved ground	Internal test pin; must be connected to GND per layout guidelines

Key Features

Feature	Design Value
MultiSynth™ synthesis engine	Enables true zero-ppm frequency accuracy on all four outputs - eliminates need for multiple crystals or trimming
Independent output voltage per driver	Allows simultaneous LVDS (1.8 V) and HCSL (3.3 V) outputs - simplifies multi-chip timing in heterogeneous systems
Programmable spread spectrum	Configurable 0.5–5.0% down-spread at 33–63 kHz - reduces EMI without altering system timing margins
Glitchless frequency adjustment	1 ppm step size with hardware pin control - enables dynamic clock scaling in real-time applications without cycle slips
External feedback mode	Supports zero-delay operation - critical for synchronous clock distribution in backplane or switch fabric designs

Applications

PCIe Gen 3/4 Timing	Ethernet Switch Clocking
Use Scenario: Providing synchronized 100 MHz reference clocks to multiple PCIe Gen 3/4 endpoints and root complexes in server motherboards or accelerators. IC Role / Device Role / Timing Role: Quad-output common clock source meeting PCIe Gen 3 SRNS and Gen 4 jitter specifications (≤0.32 ps RMS). Use Value: Eliminates four discrete oscillators while maintaining sub-0.5 ps RMS jitter across all outputs - reduces BOM count and board area by >60%.	Use Scenario: Generating 125 MHz, 156.25 MHz, and 312.5 MHz clocks for 1/10 GbE PHYs, MACs, and packet processors in enterprise switches. IC Role / Device Role / Timing Role: Any-frequency clock generator supporting IEEE 802.3 standards with low additive jitter (<0.7 ps RMS). Use Value: Single-device support for multi-rate Ethernet interfaces - avoids clock domain crossing issues and simplifies power sequencing.
Broadcast Video Timing	FPGA/Processor Clocking
Use Scenario: Delivering precise 27 MHz, 74.25 MHz, and 148.5 MHz pixel clocks to SDI transceivers, video encoders, and frame synchronizers in broadcast infrastructure. IC Role / Device Role / Timing Role: Low-jitter, format-flexible clock source compliant with SMPTE ST 292/372/424 jitter limits. Use Value: Independent phase adjustment (<20 ps step) enables pixel-perfect synchronization across multiple video paths - critical for multi-channel playout servers.	Use Scenario: Supplying core, memory, and peripheral clocks (e.g., 500 MHz CPU, 200 MHz DDR3, 100 MHz PCIe) to Xilinx Zynq or Intel Agilex FPGAs in embedded vision or radar systems. IC Role / Device Role / Timing Role: Configurable quad clock generator with independent voltage domains per output bank. Use Value: One IC drives mixed-voltage FPGA I/O banks (1.8 V LVDS, 3.3 V CMOS) - removes need for external level translators and reduces signal integrity risk.

PCIe Gen 3/4 Timing

Ethernet Switch Clocking

Use Scenario: Providing synchronized 100 MHz reference clocks to multiple PCIe Gen 3/4 endpoints and root complexes in server motherboards or accelerators.

IC Role / Device Role / Timing Role: Quad-output common clock source meeting PCIe Gen 3 SRNS and Gen 4 jitter specifications (≤0.32 ps RMS).

Use Value: Eliminates four discrete oscillators while maintaining sub-0.5 ps RMS jitter across all outputs - reduces BOM count and board area by >60%.

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

IC Role / Device Role / Timing Role: Any-frequency clock generator supporting IEEE 802.3 standards with low additive jitter (<0.7 ps RMS).

Use Value: Single-device support for multi-rate Ethernet interfaces - avoids clock domain crossing issues and simplifies power sequencing.

Broadcast Video Timing

FPGA/Processor Clocking

Use Scenario: Delivering precise 27 MHz, 74.25 MHz, and 148.5 MHz pixel clocks to SDI transceivers, video encoders, and frame synchronizers in broadcast infrastructure.

IC Role / Device Role / Timing Role: Low-jitter, format-flexible clock source compliant with SMPTE ST 292/372/424 jitter limits.

Use Value: Independent phase adjustment (<20 ps step) enables pixel-perfect synchronization across multiple video paths - critical for multi-channel playout servers.

Use Scenario: Supplying core, memory, and peripheral clocks (e.g., 500 MHz CPU, 200 MHz DDR3, 100 MHz PCIe) to Xilinx Zynq or Intel Agilex FPGAs in embedded vision or radar systems.

IC Role / Device Role / Timing Role: Configurable quad clock generator with independent voltage domains per output bank.

Use Value: One IC drives mixed-voltage FPGA I/O banks (1.8 V LVDS, 3.3 V CMOS) - removes need for external level translators and reduces signal integrity risk.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5338A-B05142-GM	Same pinout and register map; factory-programmed OTP version with preloaded configuration - no I²C programming required at power-up	Best for cost-sensitive, high-volume applications where clock frequencies are fixed and field reprogramming is unnecessary	Select when boot-time clock availability is critical and configuration stability outweighs flexibility needs
ICS853S02AG-01LFT	Fixed 2-output LVDS generator; no I²C interface; lower integration - lacks MultiSynth™, spread spectrum, or independent voltage control	Suitable only for simple dual-clock buffering; cannot synthesize arbitrary frequencies or replace four oscillators	Choose only for legacy designs requiring drop-in replacement of basic clock buffers - not a functional substitute for SI5338M-B05142-GMR

Compared with Si5338A-B05142-GM, the SI5338M-B05142-GMR offers full runtime reconfigurability via I²C but requires initialization firmware; compared with ICS853S02AG-01LFT, it provides four programmable outputs, ultra-low jitter synthesis, and comprehensive input/output flexibility - making it suitable for next-generation high-speed serial timing where adaptability and precision are mandatory.

Availability

SI5338M-B05142-GMR is available at Aetrix Electronics and suitable for PCIe Gen 4 server boards, 10 GbE switch fabrics, broadcast video equipment, and FPGA-based industrial controllers requiring stable component supply and long-term lifecycle support.

Supply support for SI5338M-B05142-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 and mixed-signal semiconductors, specializing in RF, timing, and connectivity solutions for communications, automotive, and industrial markets.

The Si5338 product line was designed specifically for high-performance, multi-protocol clock generation in datacenter, networking, and broadcast systems - delivering programmable precision timing with minimal board space and power consumption.

FAQ

What is the default configuration state of SI5338M-B05142-GMR at power-up?

The SI5338M-B05142-GMR powers up in reset state with all outputs disabled and internal registers holding factory-default values. It requires I²C initialization before generating valid clocks. Unlike OTP-programmed variants such as Si5338A-B05142-GM, the SI5338M-B05142-GMR does not retain user configuration across power cycles unless external nonvolatile storage and boot firmware are implemented. This behavior ensures predictable startup but mandates host processor intervention for first-use configuration.

Does SI5338M-B05142-GMR support PCIe Gen 4 Common Clock architecture?

Yes, SI5338M-B05142-GMR meets PCIe Gen 4 Common Clock jitter requirements with ≤0.45 ps RMS (10 kHz–50 MHz) when configured per Skyworks AN562 guidelines. Its MultiSynth™ engine achieves this using a 2–4 MHz PLL bandwidth and optimized loop filter settings. The device also supports Gen 4 Separate Reference No Spread (SRNS) mode with ≤0.32 ps RMS jitter, verified using the Skyworks PCIe Clock Jitter Tool. All four outputs can simultaneously meet Gen 4 specs under specified load and layout conditions.

Can SI5338M-B05142-GMR generate four different frequencies above 350 MHz simultaneously?

No, SI5338M-B05142-GMR cannot generate four unique frequencies above 350 MHz simultaneously. Per Skyworks documentation, only two distinct frequencies above 350 MHz may be active at once - specifically Fvco/4 and Fvco/6 - due to VCO frequency constraints and synthesis stage limitations. Frequencies such as 473.33 MHz or 710 MHz are supported individually or in paired combinations, but not across all four outputs concurrently. For full-bandwidth multi-output use, frequencies should be selected below 350 MHz or follow the Fvco/4 and Fvco/6 pairing rule.

How does the spread-spectrum feature of SI5338M-B05142-GMR affect timing accuracy?

The spread-spectrum feature of SI5338M-B05142-GMR introduces controlled frequency modulation (0.5–5.0% down-spread at 33–63 kHz) to reduce electromagnetic interference, but it does not degrade long-term frequency accuracy. The base frequency remains locked to the reference with zero ppm error; only the instantaneous output deviates within the spread window. For applications requiring tight period jitter (e.g., PCIe), Skyworks specifies that spread-spectrum operation maintains total jitter ≤20 ps pk-pk in integer-mode synthesis - ensuring compliance with protocol timing budgets while achieving EMI reduction.

Is external crystal load capacitance adjustment required for SI5338M-B05142-GMR when using an 18 pF crystal?

Yes, SI5338M-B05142-GMR's on-chip crystal load capacitance is fixed at 12 pF (supported range 11–13 pF), so an external 18 pF crystal requires register-level compensation. Skyworks Application Note AN360 details how to adjust CL register bits to effectively increase the load seen by the crystal, enabling stable oscillation with higher-capacitance crystals. Without this adjustment, the SI5338M-B05142-GMR may fail to start or exhibit frequency drift. The process is performed via I²C and is part of standard ClockBuilder Pro configuration flow.

SI5338M-B05142-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)

SI5338M-B05142-GMR FAQ

1.How can I place an order for SI5338M-B05142-GMR through Aetrix?

Please submit a Request for Quotation (RFQ) for SI5338M-B05142-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 SI5338M-B05142-GMR reliable?

The price and inventory of SI5338M-B05142-GMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5338M-B05142-GMR is usually 5 days.

3.What payment methods are accepted for SI5338M-B05142-GMR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5338M-B05142-GMR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI5338M-B05142-GMR?

SI5338M-B05142-GMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI5338M-B05142-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 SI5338M-B05142-GMR?

For technical support, including SI5338M-B05142-GMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5338M-B05142-GMR requirements.

6.How does Aetrix verify that SI5338M-B05142-GMR is sourced from the original manufacturer or authorized distributors?

All SI5338M-B05142-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 SI5338M-B05142-GMR meets industry standards.

7.What is the process for return or replacement of SI5338M-B05142-GMR?

All SI5338M-B05142-GMR units undergo pre-shipment inspection (PSI). If there is an issue with SI5338M-B05142-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 SI5338M-B05142-GMR part is unused and in its original packaging.

Return procedure for SI5338M-B05142-GMR:

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…