SI5338B-B03799-GMR

Overview

The SI5338B-B03799-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 350 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 of 1.5, 1.8, 2.5, or 3.3 V per driver. It operates from a single core supply of 1.8, 2.5, or 3.3 V in a 24-lead QFN 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 including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Independently configurable outputs support multiple signal formats (LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL) with individual voltage levels.

Applications

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

Procurement Notes

Verify the specific B03799 factory configuration against the datasheet's ordering information table to ensure correct output frequencies and formats. Confirm that the I2C programming requirements align with the system design, as the device requires software configuration via ClockBuilder Pro for operation.

Selection Notes

Select this component when four independent clock signals with varying frequencies or formats are required from a single source. Ensure the input reference frequency falls within the supported range of 5 MHz to 710 MHz depending on the interface type. Verify that the target output frequencies do not exceed 350 MHz for standard configurations or check specific high-frequency limitations for Fvco/4 and Fvco/6 outputs.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' suffix typically denotes a specific factory-programmed configuration variant within the series. The 'GMR' suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family may exist but require verification of the internal configuration file. Generic clock generators lack the MultiSynth flexibility and must be reprogrammed if compatible. Consult Skyworks documentation for updated revisions or alternative part numbers with identical electrical characteristics.