SI5338B-B09321-GMR

Overview

The SI5338B-B09321-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. The device accepts inputs up to 710 MHz and generates outputs with typical phase jitter of 0.7 ps RMS. Powered by a single core supply (1.8 V, 2.5 V, or 3.3 V), it operates within a -40 °C to +85 °C temperature range in a 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables zero ppm precision frequency synthesis on four independent outputs.
• Supports flexible input references: external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential (5–710 MHz).
• Configurable output drivers support various signal formats and independent supply voltages (1.5 V, 1.8 V, 2.5 V, or 3.3 V).
• Features glitchless frequency adjustment via independent increment/decrement pins and spread spectrum generation.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant timing
• Ethernet switch/router clocking
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific factory configuration code B09321 against the official Skyworks ordering guide to ensure correct pinout and pre-programmed parameters. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly processes.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies derived from a single reference source. Ensure the target output voltage levels match the available VDDOx supplies. Validate that the required output frequencies fall within the supported ranges for the chosen driver format, particularly noting limits for high-speed differential outputs above 350 MHz.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' designation typically refers to a specific factory programming configuration, while 'GMR' denotes the reel packaging format. It serves as a replacement for multiple discrete crystal oscillators in complex digital systems.

Replacement Considerations

Direct replacements must maintain the 24-QFN footprint and compatible electrical characteristics. Verify that alternative devices support the same MultiSynth architecture if independent frequency synthesis is required. Check for compatibility with existing I2C control software and register maps.