Skyworks Solutions Inc. SI5338C-B05602-GM

Overview

SI5338C-B05602-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 in a 4 × 4 mm 24-QFN package. It replaces up to four crystal oscillators in high-speed serial interface timing applications.

For engineers reviewing the SI5338C-B05602-GM datasheet, SI5338C-B05602-GM pinout, SI5338C-B05602-GM application, or SI5338C-B05602-GM equivalent, key selection criteria include its MultiSynth™-based any-frequency synthesis (0.16–710 MHz per output), independent output voltage per driver (1.5/1.8/2.5/3.3 V), spread-spectrum capability (0.5–5.0% down-spread), and PCIe Gen 4 jitter compliance (0.15–0.45 ps RMS).

Technical Context

The SI5338C-B05602-GM implements a two-stage PLL architecture: a high-stability reference stage (input frequency range 5–710 MHz) followed by four independent MultiSynth™ fractional-N synthesizers, each driving a configurable output buffer. Each synthesizer supports integer or fractional mode with <1 ppb frequency resolution and programmable initial phase offset (±45 ns).

It features dual input paths - differential (IN1/IN2, IN5/IN6), single-ended CMOS (IN3/IN4), or external crystal (8–30 MHz) - and supports zero-delay mode via external feedback. Loss-of-lock and loss-of-signal alarms, plus I²C/SMBus-compatible configuration, enable robust system-level timing control in FPGA, processor, and switch/router platforms.

Key Specifications

Pinout & Package

SI5338C-B05602-GM is housed in a 24-lead QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Rev. 1.6 datasheet, page 33 (Pin Descriptions) and page 37 (Device Pinout by Part Number).

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D05602-GM, SI5338C-B05602-GM offers lower system cost and smaller footprint but lacks integrated crystal and sub-0.4 ps jitter. Compared with ICS853S01AGI-01LFT, it provides full frequency programmability and PCIe Gen 4 compliance at the expense of higher complexity and bill-of-materials count.

Availability

SI5338C-B05602-GM is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, 10GbE line cards, and broadcast video sync applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SI5338C-B05602-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 wireless, broadband, automotive, and industrial markets.

The Si5338 product line delivers highly configurable, low-jitter clock generation for high-speed serial interfaces including PCIe, Ethernet, Fibre Channel, and broadcast video, with emphasis on design flexibility and system-level timing integrity.

FAQ

What is the maximum output frequency supported by SI5338C-B05602-GM in LVPECL format?

The SI5338C-B05602-GM supports LVPECL outputs up to 710 MHz, as specified in Table 6 of the Skyworks Rev. 1.6 datasheet. This applies when using the MultiSynth™ synthesizer in integer mode with appropriate VCO settings. Frequencies above 350 MHz require careful layout and termination to maintain jitter performance below 1 ps RMS.

Does SI5338C-B05602-GM support PCIe Gen 4 Separate Reference No Spread (SRNS) mode?

Yes, SI5338C-B05602-GM is compliant with PCIe Gen 4 SRNS requirements, achieving ≤0.32 ps RMS jitter under specified test conditions (PLL bandwidth 2–4 MHz, CDR = 10 MHz). This is verified in Table 12 of the Skyworks Rev. 1.6 datasheet and confirmed using the Skyworks PCIe Clock Jitter Tool.

Can SI5338C-B05602-GM generate four different output frequencies simultaneously?

Yes, SI5338C-B05602-GM uses four independent MultiSynth™ engines to synthesize four distinct frequencies simultaneously - for example, 100 MHz (PCIe), 125 MHz (GbE), 156.25 MHz (10GbE), and 297 MHz (SDI) - all from a single 25 MHz crystal reference, with 0 ppm frequency error and <20 ps phase step resolution.

What is the function of the INTR pin on SI5338C-B05602-GM?

The INTR pin on SI5338C-B05602-GM is an open-drain interrupt output that asserts low during loss-of-lock (LOL) or loss-of-signal (LOS) events. It connects directly to a microcontroller GPIO or FPGA interrupt controller, enabling real-time fault detection and system-level timing health monitoring without polling the I²C interface.

Is SI5338C-B05602-GM compatible with ClockBuilder Pro software?

Yes, SI5338C-B05602-GM is fully supported by Skyworks ClockBuilder Pro software (v3.x+), which provides GUI-based configuration, real-time jitter estimation, register map generation, and .hex file export for one-time programming of the device's OTP NVM. Configuration files generated for SI5338C-B05602-GM are not interchangeable with other Si5338 variants without validation.