SI5345D-B04204-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345D-B04204-GM is a 10-channel jitter attenuator and clock multiplier featuring fourth-generation DSPLL and MultiSynth technologies. It supports any-frequency generation from differential inputs ranging from 8 kHz to 750 MHz, producing outputs up to 350 MHz. The device operates on a 1.8 V core supply (VDD) and a 3.3 V analog supply (VDDA), with independent output supplies selectable at 3.3 V, 2.5 V, or 1.8 V. It utilizes a 64-QFN 9x9 mm package and functions 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 using fractional synthesis
• Features ultra-low jitter performance of 90 fs rms
• Supports hitless input clock switching between fractionally related clocks
• Includes in-circuit programmable non-volatile memory for known power-up configurations

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 B04204 suffix against the required system specifications. Confirm that the 64-QFN package dimensions align with the PCB land pattern requirements. Ensure the serial interface protocol matches the host controller capabilities.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when an output frequency limit of 350 MHz is sufficient, as higher frequency variants exist within the Si5345 family. Verify that the required number of inputs and outputs matches the 4-input, 10-output architecture. Consider the available programming tools and NVM requirements for production deployment.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. The Si5345 variant specifically provides four inputs and ten outputs in a compact 64-QFN package. It shares core DSPLL technology with the Si5344 and Si5342 models but offers the highest channel count in the series.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5345B-D-GM

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the Si5345D variant?

The Si5345D variant supports output frequencies up to 350 MHz.

Does the device support glitchless input switching?

Yes, the device can switch between input clock frequencies up to ±500 ppm apart without abrupt phase changes at the output.

How is the loop filter implemented in this device?

The loop filter is fully integrated on-chip, eliminating the need for discrete external components and reducing noise coupling risks.