SI5345A-B03278-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345A-B03278-GMR is a low-jitter, 10-output clock synthesizer and jitter attenuator from Skyworks Solutions. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate any frequency combination from any input source. The device supports differential inputs up to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 1028 MHz for differential formats and up to 250 MHz for LVCMOS. It features ultra-low jitter performance of 90 fs rms and meets ITU-T G.8262 SyncE requirements. The component operates within a temperature range of -40°C to +85°C and is housed in a 64-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional and integer synthesis modes.
• Features an integrated loop filter and digitally programmable jitter attenuation bandwidth for optimized noise performance.
• Supports hitless input clock switching between fractionally related sources with automatic or manual selection capabilities.
• Includes in-circuit programmable non-volatile memory to ensure known frequency configuration upon power-up.

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 confirm tape-and-reel packaging and factory pre-programming status. Confirm RoHS compliance and lead times directly with authorized distributors as availability may vary. Ensure the part number matches the exact Rev D specification required for your design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when high-frequency outputs up to 1028 MHz are required alongside low-jitter performance. Verify that the application requires the Si5345A variant which supports both integer and fractional synthesis modes across the full frequency range. Ensure the system design accommodates the 64-QFN package dimensions and thermal requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of jitter attenuators, specifically the Si5345A variant designed for high-frequency applications. It shares the core DSPLL architecture with the Si5345B and Si5345C models but offers extended output frequency capabilities. The family is widely used in telecommunications infrastructure requiring precise clock distribution.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers: SI5345A-D-GMR, SI5345A-D08042-GMR.