SI5344A-B05676-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344A-B05676-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 combination of output frequencies from any input frequency. The device supports differential inputs from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 1028 MHz for differential outputs and up to 250 MHz for LVCMOS. It features an ultra-low jitter performance of 90 fs rms and meets ITU-T G.8262 EEC Options 1 and 2. The component operates within a temperature range of –40 to +85 °C and is housed in a 44-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis modes
• Features programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz with integrated loop filter
• Supports hitless input clock switching between fractionally related clocks and glitchless on-the-fly output frequency changes
• Includes in-circuit programmable non-volatile memory for known power-up configuration and status monitoring

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 correct packaging and pre-programming options. Confirm availability through authorized distributors as supply levels may vary. Ensure the selected variant matches the required output frequency range and package type for the target application design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when four independent output clocks are required with high-frequency flexibility up to 1028 MHz. The Si5344A variant specifically supports both integer and fractional synthesis modes. Consider the 44-QFN package dimensions and thermal requirements during PCB layout. Use ClockBuilder Pro software to configure the serial interface settings and NVM data.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. The Si5344A distinguishes itself by offering four inputs and four outputs in a compact 44-QFN package. It shares core DSPLL technology with the ten-output Si5345 and two-output Si5342 variants, providing scalable solutions for different channel count requirements.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other SKUs within the Si5344 family such as Si5344B-D-GMR or Si5344C-D-GMR, depending on whether integer-only or lower frequency synthesis is sufficient. Cross-family alternatives like the Si5342 series offer fewer outputs but share similar pinouts and functionality.