SI5345D-B03776-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345D-B03776-GM is a clock synthesizer and jitter cleaner from Skyworks Solutions, featuring 10 outputs within the Si5345 family. It supports output frequencies up to 350 MHz with differential signaling and LVCMOS up to 250 MHz. The device accepts differential inputs from 8 kHz to 750 MHz and LVCMOS inputs from 8 kHz to 250 MHz. Operating on a single 1.8 V core voltage (VDD) and 3.3 V analog supply (VDDA), it functions between -40 °C and +85 °C. Packaged in a 64-QFN (9×9 mm) format, it integrates non-volatile memory for configuration storage.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fourth-generation DSPLL and MultiSynth technologies.
• Provides ultra-low jitter performance of 90 fs rms with digitally programmable jitter attenuation bandwidth.
• Supports hitless input clock switching, free-run modes, and holdover capabilities with automatic or manual selection.
• Features highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL standards.

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 packaging and factory preprogramming options. Confirm RoHS compliance status and lead times directly with authorized distributors. Check for any process change notifications that may affect pin compatibility or electrical specifications prior to finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when fractional synthesis is required alongside integer modes, as the 'D' variant supports both. Ensure the design accommodates the 64-QFN package thermal requirements. Verify that the application requires the 350 MHz maximum output frequency limit rather than the higher range available in 'A' or 'C' variants. Use ClockBuilder Pro software for optimal loop bandwidth and configuration settings.

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, distinguishing it from the Si5344 (four outputs) and Si5342 (two outputs). All share the same underlying DSPLL technology and package options, differing primarily in channel count and specific frequency ranges defined by their suffixes.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-D-GMR

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 for differential outputs and up to 250 MHz for LVCMOS outputs.

Does the SI5345D support fractional frequency synthesis?

Yes, the Si5345D supports both integer and fractional frequency synthesis modes, allowing for precise frequency generation from various input sources.

How does the device handle input clock loss?

The device monitors inputs for Loss of Signal (LOS) and Out-of-Frequency (OOF). If the selected input fails, it can enter Holdover Mode using stored historical data or switch to an alternative valid input if configured for automatic switching.