SI5351A-B02631-GT

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5351A-B02631-GT is a factory preprogrammed I2C programmable clock generator from Skyworks Solutions. It utilizes an internal oscillator with a fixed-frequency crystal reference (25 or 27 MHz) to generate up to three independent, non-integer-related CMOS clock outputs. The device supports output frequencies ranging from 2.5 kHz to 200 MHz with zero ppm error. It operates within a core supply voltage range of 2.25 V to 3.60 V and an output buffer voltage range of 1.71 V to 3.60 V. The component is housed in a 10-MSOP package and functions across an ambient temperature range of -40°C to 85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple asynchronous clock frequencies using a PLL and high-resolution MultiSynth fractional divider architecture.
• Configurable spread spectrum modulation selectable at each output for EMI reduction.
• Supports glitchless frequency changes and static phase offset adjustments.
• Features separate voltage supply pins allowing independent level translation between core and output buffers.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Replacing discrete crystals, crystal oscillators, and VCXOs in cost-sensitive designs
• Audio and video equipment clocking
• Networking and communication infrastructure
• Servers and storage systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory preprogramming code associated with the suffix B02631 against project requirements, as this variant contains custom configuration data rather than blank registers. Confirm that the 10-MSOP package dimensions and pinout align with the target PCB footprint. Ensure the external crystal frequency matches the device's supported 25 MHz or 27 MHz specifications for proper operation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a fixed, factory-defined clock configuration is required without on-board I2C programming. The Si5351A variant is appropriate for applications needing only free-running clocks derived from a crystal reference. Consider the 10-MSOP package if board space is limited and fewer than four outputs are necessary. Verify power supply constraints match the specified VDD and VDDO ranges.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5351 family of I2C-programmable clock generators. The 'A' designation indicates it relies solely on a crystal input, distinguishing it from the Si5351B (which includes a VCXO) and Si5351C (which accepts an external CLKIN). The 'GT' suffix denotes tube packaging, while the numeric code represents the unique factory preprogrammed settings.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements include other factory preprogrammed variants within the Si5351A series, such as SI5351A-Bxxxxx-GT, provided the preprogrammed frequencies meet system needs. Blank register versions like SI5351A-B-GT can be used if field reconfiguration via I2C is feasible.