SI5345B-B03419-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B03419-GMR is a clock synthesizer and jitter cleaner from Skyworks Solutions, utilizing fourth-generation DSPLL and MultiSynth technologies. It features four inputs and ten outputs within a 64-QFN package. The device generates any combination of output frequencies from any input frequency, supporting differential inputs up to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential formats and 100 Hz to 250 MHz for LVCMOS. It achieves ultra-low jitter of 90 fs rms and meets ITU-T G.8262 EEC Options 1 and 2. Operating voltage ranges from 1.71 V to 3.47 V, with an operating 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 integer and fractional synthesis.
• Features programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz for optimized performance.
• Supports hitless input clock switching between fractionally related clocks without phase offset propagation.
• Includes in-circuit programmable non-volatile memory (NVM) 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 factory preprogrammed configuration associated with the B03419 suffix against project requirements before procurement. Confirm that the QFN-64 package dimensions align with the PCB land pattern design. Ensure the serial interface protocol matches the system controller capabilities. Validate thermal dissipation characteristics under maximum load conditions.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when applications require ten independent output channels with frequencies capped at 350 MHz. The B-series designation indicates support for both integer and fractional synthesis modes. Verify compatibility with external crystal frequencies between 25 MHz and 54 MHz for optimal jitter performance. Consider the Fastlock feature if rapid lock acquisition times are critical for the system operation.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of jitter attenuating clock multipliers. It shares the same core architecture as the Si5345A and Si5345D variants but differs in supported output frequency ranges and synthesis modes. The B-series specifically targets applications requiring lower maximum output frequencies compared to the A-series while maintaining high jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Direct replacement requires matching the specific preprogrammed configuration or reprogramming via ClockBuilder Pro software. Verify pinout and package compatibility with existing designs.