SI5338B-B08686-GMR

Overview

The SI5338B-B08686-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis on four output drivers. It supports any frequency up to 710 MHz with zero ppm precision and features low phase jitter of 0.7 ps RMS typical. The device accepts various input references including differential clocks up to 710 MHz and single-ended CMOS/SSTL/HSTL inputs. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats with independent supply voltages. Controlled via an I2C interface, it operates on a single core supply of 1.8, 2.5, or 3.3 V within a 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock standards.
• Flexible input reference options: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz).
• Independent output voltage per driver (1.5, 1.8, 2.5, or 3.3 V) and support for glitchless frequency adjustments in 1 ppm steps.

Applications

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

Procurement Notes

Verify the specific factory configuration code B08686 against the official Skyworks datasheet ordering information table to confirm pinout and electrical characteristics. Confirm RoHS compliance status and moisture sensitivity level prior to procurement. Ensure the I2C pull-up voltage requirements match the system design if operating below 2.5 V.

Selection Notes

Select this component when designing systems requiring four independent clock outputs with precise frequency accuracy and low jitter. Ensure the required output signal format (LVPECL, LVDS, HCSL, etc.) and voltage levels are supported by the specific output drivers. Verify that the input reference frequency falls within the supported ranges for the chosen input mode.

Part Context

This part belongs to the Si5338 family of I2C-programmable any-frequency, any-output quad clock generators. The suffix -GMR indicates a tape-and-reel packaging option. The 'B' designation refers to a specific factory programming configuration defining the output frequencies and formats.

Replacement Considerations

Direct replacements within the Si5338 family include SI5338A, SI5338J, and SI5338Q variants, provided their factory configurations match the required output frequencies and formats. Verify pin compatibility and thermal characteristics when substituting.