SI5345B-B05736-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B05736-GMR is a clock synthesizer and jitter cleaner manufactured by Skyworks Solutions Inc. It features four inputs and ten outputs, packaged in a 64-QFN (9x9 mm) form factor. The device supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential signals and up to 250 MHz for LVCMOS. It operates on a core voltage of 1.8 V ±5% and an I/O voltage of 3.3 V ±5%. The component functions within a 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 fourth-generation DSPLL and MultiSynth technologies.
• Provides ultra-low jitter performance with programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz.
• Supports hitless input clock switching, free-run modes, and holdover capabilities with automatic or manual selection.
• Features highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL standards.

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 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 package type and tape-and-reel specifications. Ensure compatibility with ClockBuilder Pro software for configuration. Confirm RoHS compliance status and lead times directly with authorized distributors prior to procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when applications require low-jitter clock generation with up to ten outputs and support for fractional frequency synthesis. Verify that the required output frequency range does not exceed 350 MHz for differential signals. Ensure the design accommodates the 64-QFN package dimensions and thermal requirements for the specified operating temperature range.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of jitter attenuators and clock multipliers. It shares architectural similarities with the Si5344 and Si5342 models but offers a higher channel count. The 'B' designation indicates a maximum output frequency limit of 350 MHz, distinguishing it from the 'A' variant which supports frequencies up to 1028 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The Si5345A-D-GMR serves as a high-frequency alternative if outputs exceeding 350 MHz are required. For designs requiring fewer outputs, the Si5344 or Si5342 variants may be suitable. Verify pinout compatibility and register settings when substituting within the same family.