SI5351A-B05569-GT

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5351A-B05569-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 eight free-running clocks. The device supports output frequencies ranging from 2.5 kHz to 200 MHz with 0 ppm error. It operates on a core supply voltage of 2.5 V or 3.3 V and output voltages of 1.8, 2.5, or 3.3 V. The component is housed in a 20-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple non-integer-related clock frequencies using MultiSynth fractional dividers
• Factory preprogrammed configuration eliminates the need for external I2C initialization
• Supports glitchless frequency changes and static phase offset capabilities
• Features separate voltage supply pins for flexible level translation

Clock Generators, PLLs, Frequency Synthesizers Applications

• XO replacement in cost-sensitive designs
• Audio/video equipment and gaming systems
• Printers, scanners, and projectors
• Residential gateways and networking communication devices

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory preprogrammed configuration associated with the suffix B05569 against system requirements before integration. Confirm that the 20-QFN package dimensions match the PCB footprint. Ensure the I2C address and register map align with the host controller's communication protocol.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this variant when a fixed, non-user-programmable clock solution is required to reduce software complexity. The Si5351A version is appropriate for applications needing only free-running clocks without VCXO or external CLKIN synchronization. Verify that the maximum output frequency and jitter specifications meet the target application's timing constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5351 family of CMOS clock generators. The 'A' designation indicates it uses an internal oscillator driven by a crystal, distinguishing it from the Si5351B (VCXO) and Si5351C (CLKIN) variants. The 'GT' suffix denotes the 20-QFN package type.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements within the same family include other Si5351A variants with different package options, such as SI5351A-B-GM (20-QFN) or SI5351A-B-GT (10-MSOP), provided the pinout and output count requirements are met.