SI5351A-B05564-GT

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5351A-B05564-GT is a factory preprogrammed I2C-configurable CMOS clock generator. It utilizes an internal oscillator and accepts a 25 MHz or 27 MHz crystal reference to generate up to eight free-running, non-integer-related output frequencies ranging from 2.5 kHz to 200 MHz with zero ppm error. The device operates on a core supply voltage of 2.5 V or 3.3 V and supports output voltages of 1.8 V, 2.5 V, or 3.3 V. It features low period jitter typically below 70 ps peak-to-peak and includes configurable spread spectrum capabilities.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple asynchronous clock frequencies using an internal oscillator without requiring external synchronization references.
• Provides high-resolution frequency synthesis via MultiSynth fractional dividers for precise clock generation across all outputs.
• Supports independent output voltage levels through separate core and output supply pins for flexible level translation.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Replacing discrete crystals, crystal oscillators, and VCXOs in cost-sensitive designs
• Providing clock signals for audio and video equipment
• Generating timing references for handheld instrumentation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory programming code associated with the suffix B05564 against the required system specifications before integration. Confirm that the preprogrammed configuration matches the target application requirements, as this variant is not user-reconfigurable via I2C after manufacturing.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed set of asynchronous clock frequencies is required without runtime programmability. Ensure the design accommodates the 20-QFN package dimensions and provides appropriate decoupling for the dual power domains. Verify that the crystal load capacitance requirements align with the device's internal capacitor options.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5351 family of I2C programmable clock generators. The 'A' designation indicates it uses an internal oscillator for free-running operation, while the 'Bxxxxx' suffix denotes a factory preprogrammed configuration. It serves as a direct replacement for standard crystal oscillators and PLL-based solutions in embedded systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5351A-B-GM

Clock Generators, PLLs, Frequency Synthesizers FAQ

Can the output frequencies be modified after purchase?

No, the SI5351A-B05564-GT is factory preprogrammed and cannot be reconfigured via I2C after manufacturing.

What type of reference does this device use?

It uses an internal oscillator driven by a standard 25 MHz or 27 MHz AT-cut crystal.

Does this device support synchronous clock outputs?

No, the Si5351A variant generates only free-running clocks and lacks the CLKIN input required for synchronization.