SI5344B-B03743-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344B-B03743-GMR is a low-jitter, four-output clock synthesizer and jitter attenuator from Skyworks Solutions. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate any frequency combination from any input source. 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 formats and up to 250 MHz for LVCMOS. It features ultra-low jitter performance of 90 fs rms, programmable loop bandwidths, and in-circuit programmable non-volatile memory. The component operates 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 integer and fractional synthesis.
• Features integrated digital phase-locked loop with fully on-chip loop filter to eliminate discrete noise coupling risks.
• Supports hitless input clock switching between fractionally related sources with automatic or manual selection.
• Includes in-circuit programmable non-volatile memory for persistent configuration storage 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 ordering suffix against the manufacturer's current datasheet revision to confirm package type and pre-programming status. Confirm availability through authorized distributors as supply levels fluctuate. Ensure compatibility with ClockBuilder Pro software versions for accurate configuration generation before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when applications require four independent outputs with frequencies up to 350 MHz and ultra-low jitter specifications. Verify that the required input frequency ranges fall within the supported differential and LVCMOS limits. Consider the Si5344A variant if higher output frequencies exceeding 350 MHz are necessary for the design requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5344 family of jitter attenuators, which combines DSPLL and MultiSynth technologies. It is designed for high-performance clock distribution in telecommunications and datacom infrastructure. The device offers flexible configuration options via serial interfaces and supports various output signal formats including LVDS, LVPECL, LVCMOS, CML, and HCSL.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The Si5344A-Dxxxxx-GMR serves as a functional replacement for designs requiring higher output frequencies up to 1028 MHz. The Si5342 series provides a lower pin-count alternative for applications needing fewer than four outputs. Verify register compatibility and thermal characteristics when substituting these variants.