Skyworks Solutions Inc. SI5338M-B04828-GM

Overview

SI5338M-B04828-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 and SRNS-compliant timing, 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 clocking.

For engineers reviewing the SI5338M-B04828-GM datasheet, SI5338M-B04828-GM pinout, SI5338M-B04828-GM application, or SI5338M-B04828-GM equivalent, key selection criteria include PCIe Gen 4 common-clock jitter compliance (0.15–0.45 ps RMS), independent output voltage per driver (1.5/1.8/2.5/3.3 V), MultiSynth™ frequency synthesis resolution (1 ppb), spread-spectrum control (0.5–5.0% deviation), and loss-of-lock/loss-of-signal alarm support.

Technical Context

The SI5338M-B04828-GM implements a two-stage PLL architecture: a high-stability integer-N PLL (Stage 1) locks to one of six input references (crystal, CMOS, SSTL/HSTL, or differential), followed by four independent MultiSynth™ fractional-N synthesizers (Stage 2) generating outputs from 0.16 MHz to 710 MHz. Each output supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with programmable slew rate and termination.

It features I²C/SMBus-compatible configuration, on-chip OTP NVM for factory programming, independent phase adjustment (<20 ps steps), glitchless frequency increment/decrement (1 ppm steps), and external feedback mode enabling zero-delay operation. The device supports simultaneous dual high-frequency outputs (Fvco/4 and Fvco/6) above 350 MHz with strict skew control (≤100 ps).

Key Specifications

Pinout & Package

SI5338M-B04828-GM uses a 24-lead QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Si5338 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-D06889-GM and ICS853S02AGT, the SI5338M-B04828-GM offers optimal balance of programmability, jitter performance, and pin-compatible upgrade path within the Si5338 family-enabling field-upgradable timing without hardware change, unlike the fixed-function ICS853S02AGT, and avoiding the larger footprint and higher cost of the Si5332A.

Availability

SI5338M-B04828-GM is available at Aetrix Electronics and suitable for PCIe Gen 4 switch clocking, Ethernet switch timing, and broadcast video sync generation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5338M-B04828-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 programmable any-frequency clock generation for high-speed serial interfaces, designed specifically to replace multiple crystal oscillators and simplify timing architecture in PCIe, Ethernet, and broadcast video systems.

FAQ

What is the maximum output frequency supported by SI5338M-B04828-GM in LVPECL format?

The SI5338M-B04828-GM supports LVPECL output frequencies up to 710 MHz, as confirmed in Table 6 of the Skyworks Si5338 Rev. 1.6 datasheet. This capability applies when operating in differential mode with appropriate load termination and VDDO ≥ 2.5 V. Frequencies above 350 MHz are limited to two unique outputs simultaneously (Fvco/4 and Fvco/6), and jitter performance remains within PCIe Gen 4 specification limits at these rates.

Does SI5338M-B04828-GM support PCIe Gen 4 Separate Reference No Spread (SRNS) mode?

Yes, SI5338M-B04828-GM is explicitly SRNS-compliant per PCIe Gen 3 specifications and supports Gen 4 common-clock timing. Its measured RMS jitter is 0.11–0.32 ps RMS in SRNS mode (PLL BW 2–5 MHz, CDR = 10 MHz), satisfying the ≤0.32 ps RMS requirement. The device achieves this via its low-noise MultiSynth™ architecture and configurable loop bandwidth.

Can SI5338M-B04828-GM generate four different output frequencies simultaneously?

Yes, SI5338M-B04828-GM synthesizes four independent frequencies simultaneously using its four dedicated MultiSynth™ engines. Each output supports any frequency from 0.16 MHz to 710 MHz (format-dependent), with true zero-ppm precision enabled by fractional-N synthesis and on-chip OTP calibration. Configuration is performed via I²C or pre-programmed during manufacturing.

What input reference options does SI5338M-B04828-GM support?

SI5338M-B04828-GM accepts six input reference types: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL (5–350 MHz), HSTL (5–350 MHz), and differential (5–710 MHz) on pins IN1/IN2, IN5/IN6. Input flexibility allows direct connection to FPGA clocks, SERDES references, or crystals without external conditioning circuitry.

Is SI5338M-B04828-GM pin-compatible with other Si5338 variants?

Yes, SI5338M-B04828-GM shares the identical 24-QFN package, pinout, and register map with all Si5338 family members (e.g., Si5338A/B/C/D/E/F/G/H/M). This enables hardware reuse across configurations-only firmware programming differs. Pin compatibility is documented in Skyworks Si5338 datasheet section 8 ("Device Pinout by Part Number") and confirmed across Rev. 1.6.