Skyworks Solutions Inc. SI5338A-B05430-GM

Overview

SI5338A-B05430-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 across –40 to +85 °C in a 4 × 4 mm 24-QFN package. It replaces up to four crystal oscillators in Ethernet switch/router, processor/FPGA clocking, and broadcast video timing systems.

For engineers reviewing the SI5338A-B05430-GM datasheet, SI5338A-B05430-GM pinout, SI5338A-B05430-GM application, or SI5338A-B05430-GM equivalent, key selection criteria include its MultiSynth™-based any-frequency synthesis (0.16–710 MHz per output), independent output voltage support (1.5/1.8/2.5/3.3 V), spread-spectrum capability (0.5–5.0% deviation), and I²C/SMBus programmability with ClockBuilder Pro software integration.

Technical Context

The SI5338A-B05430-GM implements a two-stage PLL architecture: a high-stability reference stage followed by four independent MultiSynth™ fractional-N synthesizers, each driving one output pair (CLKxA/CLKxB). Its input flexibility supports external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential clocks (5–710 MHz).

Each output driver supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with independent voltage rails (VDDO0–VDDO3), programmable phase offset (±45 ns, <20 ps step), and glitchless frequency increment/decrement (1 ppm steps). Loss-of-lock and loss-of-signal alarms are provided via the INTR pin.

Key Specifications

Pinout & Package

SI5338A-B05430-GM uses a 24-lead QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow Skyworks' standardized Si5338 pinout: inputs on pins 1,2,3,4,5,6 (IN1–IN6); outputs CLK0A/B through CLK3A/B on pins 16–24; power (VDD, VDDO0–VDDO3) and control (SCL, SDA, INTR) distributed across remaining pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI5338A-B05429-GM, the SI5338A-B05430-GM delivers out-of-box PCIe Gen 3 SRNS compliance; compared with LMK04832, it offers lower power, smaller footprint, and per-output spread spectrum - making it optimal for space-constrained, multi-protocol timing in networking and broadcast systems.

Availability

SI5338A-B05430-GM is available at Aetrix Electronics and suitable for Ethernet switch/router, PCIe Gen 1–4 timing, and broadcast video timing requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5338A-B05430-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 semiconductor company specializing in analog and mixed-signal connectivity solutions for infrastructure, automotive, and mobile markets.

The Si5338 product line delivers programmable, low-jitter clock generation for high-speed serial interfaces including PCIe, Ethernet, Fibre Channel, and broadcast video - designed to replace multiple fixed-frequency oscillators with a single configurable IC.

FAQ

What is the primary function of the SI5338A-B05430-GM in a system design?

The SI5338A-B05430-GM serves as an I²C-programmable quad clock generator that synthesizes up to four independent, low-jitter output frequencies from a single input reference. It replaces multiple discrete oscillators in applications like PCIe timing, Ethernet switching, and broadcast video, enabling flexible, space-saving clock architecture with zero-ppm frequency accuracy per output.

Does the SI5338A-B05430-GM support PCIe Gen 4 Common Clock compliance?

Yes, the SI5338A-B05430-GM achieves 0.15–0.45 ps RMS jitter under PCIe Gen 4 Common Clock conditions (PLL BW 2–5 MHz, CDR = 10 MHz), fully complying with the PCI-Express Base Specification 4.0 rev. 0.5. This is verified using the Skyworks PCIe Clock Jitter Tool and Intel Clock Jitter Tool v1.6.4.

Can the SI5338A-B05430-GM generate different output voltages simultaneously?

Yes, the SI5338A-B05430-GM supports independent output supply rails (VDDO0–VDDO3) configurable for 1.5 V, 1.8 V, 2.5 V, or 3.3 V per output group. This allows simultaneous LVDS (2.5 V), HCSL (1.8 V), and CMOS (3.3 V) outputs without external level translators - a key advantage over fixed-voltage clock ICs.

How is the SI5338A-B05430-GM programmed and configured?

The SI5338A-B05430-GM is programmed via its I²C/SMBus-compatible interface using Skyworks' ClockBuilder Pro software. This GUI tool enables full register configuration, frequency synthesis setup, spread-spectrum parameters, and phase alignment - then generates custom configuration files for one-time OTP programming or runtime I²C writes.

What package type and thermal characteristics does the SI5338A-B05430-GM have?

The SI5338A-B05430-GM uses a 24-lead QFN package (4 × 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 across –40 to +85 °C ambient without forced airflow - validated per JEDEC JESD51 standards.