SI5351A-B05855-GT

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5351A-B05855-GT is a factory preprogrammed I2C programmable CMOS clock generator from Skyworks Solutions. It utilizes an internal oscillator with a crystal reference to generate up to three non-integer-related frequencies ranging from 2.5 kHz to 200 MHz on its outputs. The device operates within a core supply voltage range of 2.25 V to 3.6 V and supports output voltages of 1.8 V, 2.5 V, or 3.3 V. It features low period jitter typically under 70 ps peak-to-peak and is housed in a compact 10-pin MSOP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple asynchronous clock frequencies using a PLL and MultiSynth fractional divider architecture
• Configurable spread spectrum modulation selectable at each individual output
• Supports static phase offset and glitchless frequency changes for precise timing control
• Separate voltage supply pins enable level translation between core and output buffers

Clock Generators, PLLs, Frequency Synthesizers Applications

• Replacing crystals, crystal oscillators, VCXOs, and fanout buffers in cost-sensitive designs
• Audio and video equipment requiring precise clock synchronization
• Printers, scanners, and projectors needing multi-domain clock generation
• Residential gateways and networking communication hardware

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory preprogramming code associated with the B05855 suffix against the required frequency plan before ordering. Confirm that the 10-MSOP package meets the spatial constraints of the target PCB layout. Ensure the application design accounts for the recommended operating conditions regarding supply voltage sequencing and decoupling.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a fixed-frequency solution is preferred over user-programmable variants to reduce development time. The Si5351A variant is suitable for applications requiring only free-running clocks derived from a crystal reference. Verify that the maximum output frequency requirements do not exceed the simultaneous unique frequency limits specified in the datasheet.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5351 family of I2C programmable clock generators. The 'A' designation indicates it generates free-running clocks using an internal oscillator, while the 'B05855' suffix denotes a specific factory preprogrammed configuration. The 'GT' suffix identifies the 10-MSOP surface-mount package type.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5351A variants with different factory programming codes (e.g., SI5351A-Bxxxxx-GT) if the frequency plan differs. For applications requiring synchronous clocks or VCXO functionality, consider the Si5351B or Si5351C series.