SI5344B-B06279-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344B-B06279-GM is a factory preprogrammed jitter attenuator and clock multiplier from the Si5344 Rev D family. It features four inputs and four outputs housed in a 44-QFN package. The device generates any combination of output frequencies ranging from 100 Hz to 350 MHz using fourth-generation DSPLL and MultiSynth technologies. It supports differential input frequencies up to 750 MHz and LVCMOS inputs up to 250 MHz. Key electrical parameters include an ultra-low jitter performance of 90 fs rms, a core voltage (VDD) of 1.8 V ±5%, and an analog supply (VDDA) of 3.3 V ±5%. The unit operates within a temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency
• Ultra-low jitter performance of 90 fs rms
• Programmable jitter attenuation bandwidth for optimization
• Supports hitless input clock switching and holdover modes

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 10/40/100 G networking line cards
• GbE/10 GbE/100 GbE Synchronous Ethernet (ITU-T G.8262)
• Carrier Ethernet switches
• SONET/SDH line cards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory preprogrammed configuration associated with the B06279 suffix against the design requirements. Confirm that the 44-QFN package dimensions and pinout match the PCB footprint. Ensure the serial interface settings align with the system controller. Check for any relevant product change notifications or errata documents prior to finalizing the procurement order.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed, preconfigured clock solution is required without on-site programming. The Si5344B variant limits the maximum output frequency to 350 MHz, which suits lower-frequency applications compared to the Si5344A. Verify that the required input/output signal formats (LVDS, LVPECL, LVCMOS, CML, HCSL) are supported by the internal crosspoint switch and driver configurations.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D series, which integrates fourth-generation DSPLL and MultiSynth technologies. The Si5344 specifically offers four inputs and four outputs in a compact 44-QFN package. Unlike programmable variants, the B06279 suffix indicates a custom factory preprogrammed device with a unique numerical sequence defining its static configuration.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344B-D-GM

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the Si5344B variant?

The Si5344B variant supports output frequencies up to 350 MHz.

How does the device handle input clock loss?

The device enters holdover mode if the selected input clock becomes invalid and no other valid inputs are available, utilizing stored historical frequency data.

Is external loop filtering required?

No, the loop filter is fully integrated on-chip, eliminating the need for discrete components and reducing noise coupling risks.