SI5345A-B05128-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345A-B05128-GMR is a factory preprogrammed clock synthesizer and jitter cleaner from the Si5345 family. It features four inputs and ten outputs, supporting any-frequency generation up to 1028 MHz using integer and fractional synthesis modes. The device utilizes fourth-generation DSPLL technology for ultra-low jitter performance of 90 fs rms. It 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

• Combines fourth-generation DSPLL and MultiSynth technologies for high-performance jitter attenuation
• Supports free-run, synchronous, and holdover modes with automatic or manual input switching
• Features fully integrated on-chip loop filter to eliminate discrete noise coupling risks
• Includes in-circuit programmable non-volatile memory for known power-up configuration

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 factory preprogrammed configuration associated with the B05128 suffix against project requirements. Confirm that the GMR tape-and-reel packaging aligns with automated assembly capabilities. Ensure compatibility with the ClockBuilder Pro software version used for design validation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when an ultra-low jitter solution below 1028 MHz is required with multiple output formats. The Si5345A variant supports both integer and fractional synthesis, offering greater frequency flexibility than integer-only models. Verify that the 64-QFN footprint fits the PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D series, which includes variants like the Si5345B-D-GM. The 'A' designation indicates support for frequencies up to 1028 MHz, distinguishing it from lower-frequency 'B' or 'D' versions limited to 350 MHz. The 'GMR' suffix specifies the reel packaging format.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements include other Si5345A variants such as SI5345A-D-GM or SI5345A-D14512-GMR, provided the specific preprogrammed frequency plan matches the application needs.