Skyworks Solutions Inc. SI5338N-B06152-GMR

Overview

SI5338N-B06152-GMR from Skyworks Solutions is a quad-output, I²C-programmable clock generator implementing MultiSynth™ frequency synthesis. It delivers four independent, any-frequency outputs (0.16–710 MHz) with 0.7 ps RMS typical phase jitter, PCIe Gen 1–4 Common Clock and Gen 3 SRNS compliance, and configurable LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL signal formats. It replaces up to four crystal oscillators in high-speed serial interface timing applications.

For engineers reviewing the SI5338N-B06152-GMR datasheet, SI5338N-B06152-GMR pinout, SI5338N-B06152-GMR application, or SI5338N-B06152-GMR equivalent, key selection considerations include its 24-QFN package, 4× differential output capability, independent per-output voltage control (1.5–3.3 V), zero-ppm synthesis accuracy, and support for external crystal (8–30 MHz) or wide-range differential/CMOS inputs (5–710 MHz).

Technical Context

The SI5338N-B06152-GMR integrates a dual-stage PLL architecture: a high-stability reference PLL (Stage 1) locks to an input clock or crystal, feeding a multi-synthesis VCO stage (Stage 2) that generates four independent output frequencies via fractional-N dividers. Each output path includes programmable phase offset (<20 ps step), spread-spectrum control (0.5–5.0% spread, 33–63 kHz modulation), and loss-of-lock/loss-of-signal alarms.

Its I²C/SMBus interface enables full register configuration-including input selection, output format, voltage, termination, and SSC parameters-while ClockBuilder Pro software provides GUI-based frequency planning and one-click programming. The device operates across –40 to +85 °C with core supply options of 1.8 V, 2.5 V, or 3.3 V and independent VDDO supplies per output bank.

Key Specifications

Pinout & Package

SI5338N-B06152-GMR is housed in a 24-lead, 4 mm × 4 mm QFN package with exposed thermal pad (RoHS-compliant, halogen-free). Pin 1 is top-left corner (IN1), pin 24 is bottom-right (GND), and pin 13 is center-top (CLK3A). The package supports standard reflow profiles per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5338A-B-GM, SI5338N-B06152-GMR offers full field-programmability and flexible input/output configuration; compared with LMK04832ISQE/NOPB, it provides lower power, smaller footprint, and simpler I²C control at the expense of output count and JESD204B features.

Availability

SI5338N-B06152-GMR is available at Aetrix Electronics and suitable for PCIe Gen 4 server boards, 10/25 GbE switch designs, and broadcast video equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5338N-B06152-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 was designed to replace multiple discrete oscillators with a single, software-configurable clock generator for high-speed serial interfaces-including PCIe, Ethernet, Fibre Channel, and broadcast video-where low jitter, flexible format support, and space-constrained PCB layouts are critical.

FAQ

What is the primary function of the SI5338N-B06152-GMR in a system?

The SI5338N-B06152-GMR functions as a quad-output, any-frequency clock generator that synthesizes four independent, low-jitter clock signals from a single reference. It replaces up to four discrete oscillators or crystal-based clock sources, supporting PCIe Gen 1–4, Ethernet, broadcast video, and FPGA timing applications with programmable frequency, format, voltage, and phase per output.

Does the SI5338N-B06152-GMR support PCIe Gen 4 Common Clock compliance?

Yes, the SI5338N-B06152-GMR meets PCIe Gen 4 Common Clock jitter specifications with ≤0.45 ps RMS (12 kHz–20 MHz) when configured per Skyworks AN562 guidelines. Its 0.7 ps RMS typical phase jitter and dual-PLL architecture ensure robust compliance across temperature and voltage variations, validated using the Skyworks PCIe Clock Jitter Tool.

Can the SI5338N-B06152-GMR generate different output voltages simultaneously?

Yes, the SI5338N-B06152-GMR supports independent output buffer supplies (VDDO0–VDDO3), allowing simultaneous generation of LVPECL (3.3 V), LVDS (2.5 V), HCSL (1.8 V), and CMOS (1.5 V) outputs on separate banks. Each VDDO rail is externally supplied and decoupled, enabling direct interfacing with mixed-voltage ASICs, FPGAs, and PHYs without level shifters.

How is the SI5338N-B06152-GMR programmed, and what tools are required?

The SI5338N-B06152-GMR is programmed via its I²C/SMBus interface using Skyworks' ClockBuilder Pro software. This GUI tool enables frequency planning, output format selection, SSC configuration, and register export. No external programmer is needed-configuration can be loaded at power-up from internal OTP or dynamically updated in-system via I²C during operation.

What package type and thermal characteristics does the SI5338N-B06152-GMR have?

The SI5338N-B06152-GMR uses a 24-lead QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Its thermal resistance is θJA = 37 °C/W (still air) and θJC = 10 °C/W, enabling reliable operation at full load (45 mA core current) within the –40 to +85 °C industrial temperature range without forced airflow or heatsinking.