SI5345A-B05985-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345A-B05985-GMR is a low-jitter, 10-output clock synthesizer and jitter attenuator. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate any frequency combination from any input. 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 signals and 100 Hz to 250 MHz for LVCMOS. It features ultra-low jitter of 90 fs rms and meets ITU-T G.8262 SyncE requirements. 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 integer and fractional synthesis.
• Features programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz for optimized performance.
• Supports hitless input clock switching between fractionally related clocks without phase offset propagation.
• Includes in-circuit programmable non-volatile memory to ensure known frequency configuration 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 documentation to confirm factory preprogramming details. Confirm the package type and thermal specifications match the target PCB design. Ensure compatibility with the ClockBuilder Pro software version used for configuration. Check for any recent product change notices regarding pinout or electrical characteristics.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when high-frequency outputs up to 1028 MHz are required alongside low jitter performance. The Si5345A variant specifically supports both integer and fractional synthesis modes. Consider the 64-QFN package size for board space constraints. Verify that the application requires the specific jitter attenuation bandwidth and holdover capabilities provided by the DSPLL architecture.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of clock multipliers. It shares architectural similarities with the Si5344 and Si5342 models but offers ten output channels compared to four or two. The 'A' designation indicates support for higher output frequencies and full synthesis modes. The 'GMR' suffix typically denotes tape and reel packaging for surface mount assembly.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5345A-D-GM