SI5345B-B05661-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345B-B05661-GM is a factory preprogrammed clock synthesizer and jitter cleaner from the Si5345 family. It features four inputs and ten outputs, supporting any-frequency generation up to 350 MHz with integer and fractional synthesis modes. The device utilizes fourth-generation DSPLL technology for ultra-low jitter performance of 90 fs rms. It operates on a single 1.8 V core voltage and includes in-circuit programmable non-volatile memory. The component is housed in a 64-QFN package measuring 9x9 mm and supports 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 ultra-low jitter performance of 90 fs rms with digitally programmable loop bandwidth.
• Supports hitless input clock switching and glitchless on-the-fly output frequency changes.
• Includes in-circuit programmable non-volatile memory for known power-up configuration.

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 preprogramming configuration associated with the B05661 suffix against project requirements. Confirm that the 350 MHz maximum output frequency aligns with system needs. Ensure compatibility with the 64-QFN 9x9 mm package footprint during PCB layout. Check for RoHS-6 compliance status if required by regional regulations.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when low jitter attenuation is critical for high-speed data transmission applications. The Si5345B variant is suitable for designs requiring output frequencies up to 350 MHz. 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 10-channel jitter attenuators. It shares the same physical package and core architecture as the Si5345A and Si5345C variants but differs in maximum output frequency capabilities and synthesis mode restrictions defined by the ordering suffix.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other factory preprogrammed Si5345B devices with compatible configurations. Verify pin-to-pin compatibility with the 64-QFN package. Ensure the replacement supports the required 350 MHz output limit and 1.8 V core voltage operation.