Skyworks Solutions Inc. SI5338C-B05153-GM

Overview

SI5338C-B05153-GM 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. It replaces up to four crystal oscillators in FPGA clocking, PCIe interconnects, and broadcast video timing systems.

For engineers reviewing the SI5338C-B05153-GM datasheet, SI5338C-B05153-GM pinout, SI5338C-B05153-GM application, or SI5338C-B05153-GM equivalent, this page delivers verified specifications including MultiSynth™ synthesis resolution (1 ppb), output frequency range (0.16–710 MHz), spread-spectrum control (0.5–5.0% deviation), independent phase adjustment (<20 ps steps), and 24-QFN package compatibility.

Technical Context

The SI5338C-B05153-GM 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 per-driver supply voltage selection (1.5/1.8/2.5/3.3 V), independent frequency increment/decrement (1 ppm steps), and programmable initial phase offset (±45 ns). Loss-of-lock and loss-of-signal alarms provide real-time status monitoring via the INTR pin.

Key Specifications

Pinout & Package

SI5338C-B05153-GM is housed in a 24-lead QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are fixed per Skyworks Si5338 family specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5338A-B-GM and LMK04832ISQE/NOPB, SI5338C-B05153-GM uniquely balances field programmability, ultra-low jitter (0.7 ps RMS), compact 24-QFN footprint, and PCIe Gen 4 readiness-making it optimal for embedded systems where layout area, reprogrammability, and jitter margin are critical.

Availability

SI5338C-B05153-GM is available at Aetrix Electronics and suitable for PCIe interconnects, FPGA clocking, broadcast video timing, telecom line cards, and high-speed SerDes applications requiring stable component supply and long-term manufacturability.

Supply support for SI5338C-B05153-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 delivers programmable, low-jitter clock generation for high-speed digital systems-including servers, networking gear, broadcast equipment, and telecom hardware-where precision timing and design flexibility are essential.

FAQ

What is the primary function of the SI5338C-B05153-GM?

The SI5338C-B05153-GM is an I²C-programmable quad clock generator that synthesizes four independent, low-jitter output frequencies from a single input reference. It replaces multiple crystal oscillators in systems requiring precise, configurable timing-such as PCIe Gen 4 interconnects, FPGA clock trees, and broadcast video sync generators-while maintaining 0.7 ps RMS phase jitter performance.

Does the SI5338C-B05153-GM support PCIe Gen 4 timing requirements?

Yes, the SI5338C-B05153-GM meets PCIe Gen 4 common clock jitter specifications with 0.15–0.45 ps RMS (12 kHz–20 MHz) when configured per Skyworks' recommended settings, including PLL bandwidth of 2–4 MHz and CDR = 10 MHz. Its MultiSynth™ architecture ensures zero-ppm frequency accuracy and supports HCSL 100 MHz outputs compliant with PCI-SIG standards.

Can the SI5338C-B05153-GM generate different output formats simultaneously?

Yes, the SI5338C-B05153-GM supports simultaneous mixed-format outputs: for example, CLK0A/B as LVDS, CLK1A/B as HCSL, CLK2A/B as LVPECL, and CLK3A/B as CMOS-all with independent voltage supplies (VDDO0–VDDO3) and frequency settings. Each output driver is fully configurable via I²C registers without hardware changes.

What is the minimum and maximum input reference frequency supported by the SI5338C-B05153-GM?

The SI5338C-B05153-GM accepts input references from 5 MHz to 710 MHz depending on interface type: 8–30 MHz for external crystals; 5–200 MHz for CMOS; 5–350 MHz for SSTL/HSTL; and 5–710 MHz for differential inputs. The device's dual-stage PLL architecture maintains low jitter across this full range when configured per Skyworks' layout and decoupling guidelines.

How is the SI5338C-B05153-GM programmed and configured?

The SI5338C-B05153-GM is programmed via its I²C/SMBus-compatible interface using Skyworks' ClockBuilder Pro software, which generates register maps, validates configurations, and exports .c files for embedded initialization. Configuration can be stored in on-chip OTP memory for autonomous startup, or loaded dynamically at runtime-enabling field updates and multi-profile operation in the SI5338C-B05153-GM.