SI5345B-B03266-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B03266-GM is a 10-output jitter attenuator and clock multiplier from Skyworks Solutions. It utilizes fourth-generation DSPLL technology to generate any combination of output frequencies from any input frequency, supporting integer and fractional synthesis. The device features ultra-low jitter performance of 90 fs rms and supports output frequencies up to 350 MHz. It operates within a temperature range of -40°C to +85°C and is housed in a 64-QFN package measuring 9x9 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis
• Features ultra-low jitter performance of 90 fs rms with digitally programmable loop bandwidth
• Supports hitless input clock switching and holdover modes for high reliability
• Includes in-circuit programmable non-volatile memory for known power-up configurations

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 B03266 suffix against the official Skyworks datasheet or ClockBuilder Pro software. Confirm that the QFN-64 package dimensions and pinout match the target PCB footprint. Ensure compatibility with the required I2C or SPI serial interface settings for the intended application environment.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when low jitter attenuation is critical for synchronization applications such as SyncE. The Si5345B variant is suitable for designs requiring output frequencies up to 350 MHz. Verify that the system requires ten independent outputs and four inputs. Consider the integrated loop filter and NVM capabilities to simplify board design and ensure reliable startup states without external components.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of jitter attenuators, which also includes the Si5344 and Si5342 variants. These devices share similar core technologies but differ in the number of available outputs. The Si5345 specifically provides ten outputs, distinguishing it from the four-output Si5344 and two-output Si5342 models within the same Rev D series.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional substitutes within the same family include the SI5345A-D-GM or SI5345C-D-GM, depending on whether higher frequency ranges or integer-only synthesis are acceptable. Cross-family replacements require verification of pin compatibility and jitter specifications.