SI5345B-B03475-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B03475-GMR is a clock synthesizer and jitter cleaner from Skyworks Solutions. It features 10 outputs with a maximum output frequency of 350 MHz. The device supports CML, HCSL, LVCMOS, LVDS, and LVPECL output levels. Input levels include differential and LVCMOS, with a maximum input frequency of 750 MHz. Operating voltage ranges from 1.71 V to 3.47 V. The component operates within a temperature range of -40°C to +85°C. It is housed in a QFN-64 package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fourth-generation DSPLL and MultiSynth technologies.
• Features ultra-low jitter performance of 90 fs rms for applications requiring high signal integrity.
• Supports free-run, synchronous, and holdover modes with automatic or manual input clock switching capabilities.

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 ordering suffix against the manufacturer's current documentation to ensure correct configuration and packaging options. Confirm availability status as distribution channels may list limited stock or end-of-life conditions. Cross-reference the datasheet revision to validate electrical specifications and pinout compatibility before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when low-jitter performance up to 350 MHz is required for multi-output clock generation. Ensure the application supports the QFN-64 package dimensions and thermal requirements. Verify that the system power supply meets the specified voltage range and that the serial interface configuration aligns with the host controller capabilities.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family, which includes variants with different output counts and frequency ranges. The Si5345 series utilizes Skyworks' proprietary MultiSynth technology for flexible clock synthesis. It is designed for high-performance timing applications in telecommunications and data infrastructure sectors.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Check for updated revisions within the Si5345B series. Verify pin-to-pin compatibility with alternative SKUs if sourcing from different distributors. Ensure functional equivalence regarding jitter attenuation and output drive strength when considering substitutes.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the Si5345B variant?

The maximum output frequency for the Si5345B variant is 350 MHz.

Does the device support glitchless input switching?

Yes, the device supports glitchless input switching between input clock frequencies that are up to ±500 ppm apart.

How is the loop filter implemented in this component?

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