SI5338B-B04973-GMR

Overview

The SI5338B-B04973-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. It operates within a core supply range of 1.71 V to 3.63 V and supports input frequencies up to 710 MHz. The device features low phase jitter of 0.7 ps RMS typical, configurable output formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL, and allows independent voltage selection per driver. Encased in a 24-lead QFN package, it enables glitchless frequency adjustments and spread spectrum generation via an I2C interface.

Feature Summary

• MultiSynth technology for independent, any-frequency synthesis on four differential output drivers
• Low phase jitter of 0.7 ps RMS typical across various output formats
• Flexible input reference supporting external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz
• Independent output voltage configuration (1.5, 1.8, 2.5, or 3.3 V) and format support

Applications

• Ethernet switch/router timing
• PCIe Gen 1/2/3/4 common clock and SRNS compliance
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards and MSAN/DSLAM/PON systems

Procurement Notes

Verify the specific B04973 suffix against the manufacturer's current ordering guide to confirm pinout and functional configuration. Confirm RoHS compliance status and moisture sensitivity level requirements during storage and handling. Ensure the I2C pull-up voltage aligns with the device's operational limits when integrating into the system design.

Selection Notes

Select this component for designs requiring high-precision clock synthesis with flexible output formatting. Evaluate the required output voltage levels to determine if independent VDDOx supplies are necessary. Consider the input source type, as the device supports diverse references from low-frequency crystals to high-speed differential signals up to 710 MHz.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' designation typically indicates a specific pinout or functional variant within the series, while the numeric suffix defines the factory-programmed register settings. The '-GMR' suffix denotes tape and reel packaging suitable for automated surface-mount assembly.

Replacement Considerations

Direct replacements within the Si5338 family require matching the specific B-suffix configuration. Verify that alternative SKUs support the same output voltage ranges and jitter specifications. Cross-reference the programming file to ensure compatibility with existing firmware or ClockBuilder Pro configurations.