SI5351C-B04936-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5351C-B04936-GMR is an I2C-programmable CMOS clock generator from Skyworks Solutions, designed to replace crystals, oscillators, and PLLs. It features eight LVCMOS outputs capable of generating non-integer-related frequencies up to 200 MHz with 0 ppm error. The device synchronizes to an external reference clock (CLKIN) ranging from 10 to 100 MHz or a fixed-frequency crystal (25/27 MHz). Key electrical parameters include a core supply voltage of 2.25 V to 3.6 V, output buffer voltages of 1.8 V, 2.5 V, or 3.3 V, and typical period jitter below 70 ps peak-to-peak. It operates within a temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• I2C programmable architecture for flexible frequency synthesis
• Eight independent LVCMOS outputs with configurable drive strength
• Synchronization capability via external CLKIN input
• Integrated MultiSynth fractional dividers for precise frequency generation

Clock Generators, PLLs, Frequency Synthesizers Applications

• XO replacement in cost-sensitive designs
• Networking and communication equipment
• Servers and storage systems
• Printers, scanners, and projectors

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory preprogrammed configuration associated with the suffix B04936 using Skyworks ClockBuilder Pro software. Confirm that the required output frequencies match the programmed values, as this variant is not user-configurable after manufacturing. Ensure compatibility with the target system's I2C bus voltage levels and power sequencing requirements before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when synchronous clock generation from an external reference is required. The Si5351C variant specifically supports CLKIN inputs, distinguishing it from the Si5351A (internal oscillator only) and Si5351B (VCXO support). Verify that the desired output frequencies fall within the supported range and that the package type meets board space constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5351 family of programmable clock generators. The 'C' designation indicates support for an external clock input (CLKIN), while the 'B' series denotes the second generation of the device with enhanced features. The GMR suffix typically indicates tape and reel packaging for surface-mount assembly.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5351C variants with compatible pinouts and electrical characteristics. When substituting, ensure the new part supports the same number of outputs and frequency ranges. Verify that any differences in package dimensions or thermal resistance do not impact the existing PCB layout.