SI5380A-D07544-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5380A-D07544-GM is a high-performance, integer-based jitter attenuator and clock multiplier from Skyworks Solutions Inc., designed for small cell applications. It utilizes 4th generation DSPLL technology to combine frequency synthesis and jitter attenuation in a digital solution, eliminating the need for external VCXO and loop filter components. The device features four inputs and twelve outputs within a 64-QFN package. It supports differential input frequencies from 11.52 MHz to 737.28 MHz and LVCMOS inputs up to 245.76 MHz. Output frequencies range from 480 kHz to 1.47456 GHz differentially. Key electrical parameters include an ultra-low jitter of 65 fs typ (12 kHz to 20 MHz) and a phase noise floor of –159 dBc/Hz.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Digital frequency synthesis eliminates the requirement for external voltage-controlled oscillators and analog loop filter components.
• Supports JESD204B clocking requirements including DCLK and SYSREF generation with configurable output formats.
• Provides hitless input switching capabilities to prevent phase transients when switching between frequency-locked clock sources.

Clock Generators, PLLs, Frequency Synthesizers Applications

• JESD204B clock generation
• Remote Radio Units (RRU) and Remote Access Networks (RAN)
• Wireless base stations supporting 3G, GSM, W-CDMA, 4G/LTE, and LTE-A standards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required configuration. Check for RoHS compliance status and ensure storage conditions adhere to moisture sensitivity level guidelines to maintain device integrity prior to assembly.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Evaluate the device against system requirements for jitter attenuation and phase noise performance. Ensure the input frequency range aligns with available reference clocks. Consider the availability of ClockBuilder Pro software for configuration and verify that the 64-QFN package footprint fits the PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5380 family of wireless jitter attenuating clock multipliers. It is based on Silicon Laboratories’ 4th generation DSPLL technology. The device is designated as Not Recommended for New Designs by the manufacturer, indicating potential obsolescence or limited future support for new production runs.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Skyworks Solutions documentation for current alternative recommendations or updated product lines suitable for similar wireless infrastructure applications.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What technology does the Si5380 use to eliminate external components?

The Si5380 uses 4th generation DSPLL technology, which combines frequency synthesis and jitter attenuation in a highly integrated digital solution, removing the need for external VCXO and loop filter components.

How does the device handle input clock switching?

The device supports hitless switching for frequency-locked inputs to prevent phase transients, glitchless switching for inputs up to 40 ppm apart, and ramped input switching for plesiochronous inputs to ensure smooth transitions.

What is the purpose of the holdover mode?

Holdover mode allows the DSPLL to maintain output clock stability using averaged historical frequency data when the selected input clock becomes invalid and no other valid inputs are available.