SI5518D-B15709-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5518D-B15709-GM is a NetSync network synchronizer manufactured by Skyworks Solutions. It integrates four DSPLLs and supports up to six clock inputs and eighteen clock outputs. The device delivers ultra-low jitter performance of less than 55 fs RMS, with a maximum output frequency capability of 3.2 GHz. It operates within a temperature range of -40°C to +85°C and utilizes a 72-VFQFN package with an exposed pad.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates four independent DSPLLs for complex synchronization architectures
• Supports IEEE 1588 Precision Time Protocol (PTP) via AccuTime software
• Provides programmable loop bandwidth down to 1 mHz for wander filtering
• Features automatic or manual hitless switching between timing modes

Clock Generators, PLLs, Frequency Synthesizers Applications

• 5G Radio Units (RU) and O-RAN Small Cells
• IEEE 1588 Grandmasters and Boundary Clocks
• Core, Metro, and Edge Switches/Routers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific B15709 suffix configuration against official Skyworks documentation before procurement. Confirm that the required sample lead times align with project schedules, as custom samples may require two weeks. Ensure compatibility with the 72-QFN footprint during PCB layout planning.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring high channel counts and precise phase alignment. The integrated architecture replaces multiple discrete oscillators and buffers. Verify that the 3.2 GHz maximum frequency meets the target application requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the NetSync family of network synchronizers designed for wireless and wireline equipment. It leverages fifth-generation DSPLL technology to simplify bill-of-materials by combining synchronization, jitter attenuation, and clock generation into a single IC.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The SI5512 is a related model within the same NetSync family offering similar synchronization capabilities.