Skyworks Solutions Inc. SI5338N-B06142-GMR

Overview

SI5338N-B06142-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 such as PCIe root complexes and FPGA-based compute platforms.

For engineers reviewing the SI5338N-B06142-GMR datasheet, SI5338N-B06142-GMR pinout, SI5338N-B06142-GMR application, or SI5338N-B06142-GMR equivalent, key selection criteria include its MultiSynth™ fractional-N synthesis architecture, independent output voltage per driver (1.5/1.8/2.5/3.3 V), 0 ppm frequency accuracy on all outputs, and support for LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats up to 710 MHz.

Technical Context

The SI5338N-B06142-GMR implements a two-stage PLL architecture: a high-stability integer-N Phase-Locked Loop (Stage 1) locks to one of six input references (crystal, CMOS, SSTL/HSTL, or differential), followed by four independent MultiSynth™ fractional-N synthesis blocks (Stage 2) generating each output. Each MultiSynth supports programmable initial phase offset (±45 ns), 20 ps step resolution for phase increment/decrement, and glitchless frequency adjustment in 1 ppm steps.

Input flexibility includes external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz); outputs support LVPECL (0.16–710 MHz), LVDS (0.16–350 MHz), HCSL (0.16–250 MHz), CMOS (0.16–200 MHz), and SSTL/HSTL (0.16–350 MHz). Spread spectrum is configurable per output (0.5–5.0% spread, 33–63 kHz modulation rate).

Key Specifications

Pinout & Package

SI5338N-B06142-GMR is housed in a 4 × 4 mm, 24-pin QFN package with exposed thermal pad. Pin assignments are fixed per the Si5338 family and validated for signal integrity in high-frequency clock distribution.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D06142-GM, SI5338N-B06142-GMR offers broader input flexibility and lower BOM count for any-frequency synthesis, while ICS853S02IAGLF provides simpler, lower-cost buffering where frequency agility is not needed.

Availability

SI5338N-B06142-GMR is available at Aetrix Electronics and suitable for PCIe Gen 4 timing, Ethernet switch/router clocking, and FPGA-based video processing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SI5338N-B06142-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 for high-performance, software-configurable clock generation in data center, networking, and communications infrastructure-enabling consolidation of multiple timing sources into a single programmable IC.

FAQ

What is the primary function of the SI5338N-B06142-GMR?

The SI5338N-B06142-GMR is an I²C-programmable quad clock generator that synthesizes any frequency on each of its four outputs using Skyworks' MultiSynth™ technology. It serves as a replacement for up to four discrete crystal oscillators, delivering low-jitter clocks for PCIe, Ethernet, FPGA, and telecom applications. Its core function is flexible, high-precision frequency synthesis with independent output configuration.

Does the SI5338N-B06142-GMR support PCIe Gen 4 timing requirements?

Yes, the SI5338N-B06142-GMR meets PCIe Gen 4 common clock jitter specifications with ≤0.45 ps RMS jitter (12 kHz–20 MHz) when configured per Skyworks' recommended settings. It is explicitly listed as PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant in the official datasheet, and validated using the Skyworks PCIe Clock Jitter Tool.

Can the SI5338N-B06142-GMR generate different output voltages simultaneously?

Yes, the SI5338N-B06142-GMR supports independent output buffer supplies (VDDO0–VDDO3), allowing each of its four output banks to operate at 1.5 V, 1.8 V, 2.5 V, or 3.3 V concurrently. This enables direct interfacing with mixed-voltage components-such as 1.8 V SerDes and 3.3 V microcontrollers-without external level shifters.

How is the SI5338N-B06142-GMR programmed and configured?

The SI5338N-B06142-GMR is programmed via its I²C/SMBus-compatible interface using Skyworks' ClockBuilder Pro software. This GUI tool generates custom configuration files (.cmb), validates timing constraints, and exports register maps for production programming. Configuration can be stored in on-chip OTP memory for autonomous startup.

What package type and pin count does the SI5338N-B06142-GMR use?

The SI5338N-B06142-GMR uses a 4 × 4 mm, 24-pin QFN package with exposed thermal pad (Moisture Sensitivity Level 3). Pin assignments-including four differential output pairs (CLK0A/B to CLK3A/B), six input pins (IN1–IN6), I²C interface (SCL/SDA), interrupt (INTR), and independent VDDO rails-are standardized across the Si5338 family and documented in the datasheet's Pin Descriptions section.