SI5344B-D15674-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344B-D15674-GMR is a low-jitter, four-output clock synthesizer and jitter attenuator from the Si5344 Rev D family. 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, with output frequencies ranging from 100 Hz to 350 MHz. It features an integrated loop filter, in-circuit programmable non-volatile memory, and 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 fractional and integer synthesis modes.
• Provides ultra-low jitter performance of 90 fs rms with digitally programmable jitter attenuation bandwidth.
• Supports hitless input clock switching, free-run, synchronous, and holdover modes of operation.
• Features highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL signal formats.

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 confirm package type and factory preprogramming status. Confirm availability through authorized distributors as supply levels may vary. Ensure the serial interface configuration matches the system requirements before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for applications requiring precise jitter attenuation and flexible frequency generation across multiple outputs. The Si5344B variant is optimized for output frequencies up to 350 MHz. Utilize ClockBuilder Pro software to configure the internal registers and define the specific frequency plan required for the target application.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5344 Rev D series, which includes variants with different output counts and frequency ranges. The Si5344 specifically offers four inputs and four outputs in a 44-QFN package. It shares core architecture with the Si5345 and Si5342 but is tailored for designs requiring fewer output channels while maintaining high-performance jitter cleaning capabilities.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements within the same family include other Si5344B variants with different factory preprogrammed configurations. For systems requiring more outputs, the Si5345B is available. If higher maximum output frequencies are needed, consider the Si5344A or Si5344C variants instead.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the Si5344B variant?

The Si5344B variant supports output frequencies up to 350 MHz.

Does the device support automatic input clock switching?

Yes, the device includes an automatic input selection state machine that can switch between valid input clocks based on user-defined priorities and revertive options.

How is the device configured after manufacturing?

The device features in-circuit programmable non-volatile memory (NVM), allowing it to be programmed via a serial interface and retain its configuration upon power-up.