SI5338B-B04857-GM

Overview

The SI5338B-B04857-GM 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, CML, 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

• Four independent output drivers supporting any frequency up to 710 MHz with 0 ppm accuracy
• Low phase jitter performance of 0.7 ps RMS typical
• Flexible input options: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz)
• Independent output voltage selection (1.5, 1.8, 2.5, or 3.3 V) and format configuration (LVPECL, LVDS, CML, HCSL, CMOS, SSTL, HSTL)

Applications

• Ethernet switch/router timing
• PCIe Gen1/2/3/4 common clock and SRNS
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards

Procurement Notes

Verify the specific ordering suffix B04857 against the manufacturer's current datasheet to confirm factory-programmed settings. Confirm availability status through authorized distributors as stock levels fluctuate. Ensure I2C programming tools like ClockBuilder Pro are used for final configuration validation before deployment.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single package. Ensure the target output frequencies fall within the supported ranges for the chosen signal format (e.g., LVDS up to 710 MHz, CMOS up to 200 MHz). Verify that the input reference source matches one of the supported types and frequency ranges specified in the electrical characteristics.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' suffix typically denotes a specific silicon revision or feature set variant within the series, while 'B04857' indicates a unique factory-programmed configuration file. The '-GM' suffix specifies the 24-lead QFN package type.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants such as SI5338A or SI5338Q, provided their maximum frequency limits and output configurations meet the design requirements. Verify that the replacement part supports the necessary output formats and jitter specifications.