SI5351A-B-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5351A-B-GMR is an I2C-programmable CMOS clock generator manufactured by Skyworks Solutions. It features eight independent MultiSynth fractional dividers capable of generating non-integer-related frequencies from 2.5 kHz to 200 MHz with 0 ppm error. The device operates on a core supply voltage (VDD) of 2.25 V to 3.6 V and supports output buffer voltages (VDDO) of 1.8 V, 2.5 V, or 3.3 V. It utilizes a standard 25 MHz or 27 MHz crystal reference and delivers low period jitter, typically less than 70 ps peak-to-peak. The component is housed in a 20-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates up to eight free-running clocks using an internal oscillator for replacing crystals and crystal oscillators
• Provides exact frequency synthesis at each output with zero ppm error
• Features highly linear VCXO architecture and configurable spread spectrum capabilities
• Supports static phase offset and glitchless frequency changes

Clock Generators, PLLs, Frequency Synthesizers Applications

• Audio/video equipment and gaming systems
• Printers, scanners, and projectors
• Handheld instrumentation and laser range finders
• Residential gateways and networking/communication devices
• Servers and storage systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and factory programming status. Ensure the component matches the required pinout and electrical specifications for the target application before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when eight independent clock outputs are required without external VCXO components. Confirm that the system design accommodates the 20-QFN footprint and that the I2C interface aligns with the host controller's bus requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5351 family of programmable clock generators. The 'A' designation indicates it uses an internal oscillator for reference, distinguishing it from the 'B' variant which includes a VCXO and the 'C' variant which synchronizes to an external CLKIN input.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other variants within the Si5351 family such as the SI5351B or SI5351C, provided the reference source requirements match the application needs.