SI5345B-B04399-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B04399-GMR is a 10-output jitter attenuator and clock multiplier from the Si5345 family, manufactured by Skyworks Solutions. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate any combination of output frequencies from any input frequency. The device supports differential inputs up to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential outputs and 100 Hz to 250 MHz for LVCMOS outputs. It features ultra-low jitter performance of 90 fs rms and meets ITU-T G.8262 EEC Option 1 and 2 standards. 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 programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz for optimized performance.
• Supports hitless input clock switching with automatic or manual selection capabilities.
• 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 ordering suffix against the manufacturer's current documentation to ensure compatibility with required packaging options such as tape and reel. Confirm that the factory preprogrammed configuration matches the intended application requirements before deployment. Cross-reference the part number with the latest datasheet revisions to validate electrical specifications and operational modes.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when applications require low-jitter clock generation with flexible output frequency configurations. Ensure the design accommodates the 64-QFN package dimensions and thermal requirements. Verify that the serial interface and control logic align with the system architecture. Consider the operating temperature range and voltage supply constraints during the initial hardware design phase.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This device belongs to the Si5345 family of jitter attenuators, which also includes variants like the Si5345A and Si5345C. These parts share common architectural features but differ in maximum output frequency ranges and synthesis modes. The Si5345B specifically targets applications requiring output frequencies up to 350 MHz, distinguishing it from higher-frequency counterparts in the same series.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5345B variants with different factory programming codes, such as SI5345B-D-GMR. Ensure the substitute maintains the same output count and frequency range specifications. Verify pin-to-pin compatibility and software configuration tools like ClockBuilder Pro for seamless integration.