SI5345A-B02939-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345A-B02939-GM is a 10-channel jitter attenuator and clock multiplier 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 integer and fractional synthesis modes with an output frequency range up to 1028 MHz for differential outputs. Key electrical parameters include a core voltage (VDD) of 1.8 V ±5% and a separate analog supply (VDDA) of 3.3 V ±5%. It features programmable signal amplitude compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL. The component operates within a temperature range of –40 to +85 °C and is housed in a 64-QFN 9×9 mm package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis.
• Features ultra-low jitter performance of 90 fs rms.
• Supports hitless input clock switching between fractionally related inputs.
• 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 ordering suffix B02939 against the manufacturer's current documentation to confirm factory preprogrammed configuration details. Ensure compatibility with the required serial interface protocol (I2C or SPI) and check for any updates to the RoHS compliance status. Confirm that the 64-QFN package dimensions match the target PCB land pattern requirements.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when high channel count and flexible frequency synthesis are required. The Si5345A variant supports differential outputs up to 1028 MHz, suitable for high-speed digital interfaces. Consider the integrated loop filter and NVM capabilities if minimizing external components and ensuring deterministic boot states are critical design constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family, which includes variants like the Si5344 and Si5342 offering fewer output channels. The 'A' designation indicates support for fractional synthesis and higher maximum output frequencies compared to 'B' or 'D' variants. The 'GM' suffix denotes the standard tape and reel packaging option for surface-mount assembly.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements within the same package include other Si5345A variants such as SI5345A-D-GM, provided the specific preprogrammed configuration of B02939 is not mandatory. For applications requiring different output counts, the Si5344 or Si5342 families may be considered with appropriate schematic adjustments.