SI5347C-B-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5347C-B-GMR is a quad DSPLL jitter attenuator in a 64-QFN package. It supports differential inputs from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Outputs reach 720 MHz differentially or 250 MHz in LVCMOS. Core voltage is 1.8 V ±5%, with independent output supplies of 3.3, 2.5, or 1.8 V. Operating temperature spans -40 °C to +85 °C. The device integrates four independent DSPLLs for any-frequency conversion.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four independent DSPLLs enable flexible crosspoint routing between any input and any output.
• Supports automatic and manual hitless switching between clock inputs.
• Includes holdover mode functionality using historical frequency data.
• Features programmable loop bandwidth and fastlock capabilities.

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN Muxponders and Transponders
• 10/40/100G network line cards
• GbE/10 GbE/100 GbE Synchronous Ethernet (ITU-T G.8262)
• Carrier Ethernet switches
• Broadcast video

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape-and-reel specifications. Confirm RoHS-6 compliance status and lead times directly with Skyworks Solutions Inc. or authorized distributors before finalizing procurement plans.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when four independent timing paths are required within a single package. Ensure the application utilizes differential or LVCMOS inputs within the specified frequency ranges. Verify that the output signal formats match the system requirements for LVDS, LVPECL, LVCMOS, CML, or HCSL.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5347 family, which features quad DSPLL technology. It is distinct from the Si5346, which offers dual DSPLLs in a smaller 44-QFN package. The Si5347C variant specifically supports output frequencies up to 720 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5347C-D-GM is a tray-packaged equivalent. Si5347A-D-GMR provides similar functionality with potentially different performance grades. Consult the official datasheet for detailed electrical comparisons.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for differential outputs?

The maximum output frequency for differential outputs is 720 MHz.

How does the device handle input clock failure?

The device automatically enters Holdover Mode, using stored historical frequency data to maintain output stability until a valid input is restored.

Can the device switch between inputs without glitches?

Yes, it supports hitless switching for frequency-locked inputs and glitchless switching for inputs with slight frequency differences.