SI5345A-B04208-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345A-B04208-GMR is a factory preprogrammed, low-jitter clock multiplier and jitter attenuator from the Si5345 family. It features four inputs and ten outputs within a 64-QFN package. The device supports integer and fractional frequency synthesis with output frequencies ranging from 100 Hz to 1028 MHz for differential signals. It incorporates fourth-generation DSPLL technology to achieve ultra-low jitter performance of 90 fs rms. The unit operates on a core voltage of 1.8 V and an auxiliary voltage of 3.3 V, functioning reliably across 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 integer and fractional synthesis modes.
• Provides ultra-low jitter attenuation of 90 fs rms via fourth-generation DSPLL technology.
• 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 factory preprogrammed configuration associated with the B04208 suffix against project requirements before procurement. Confirm that the QFN-64 package dimensions align with the PCB land pattern design. Ensure the serial interface connections are compatible with the system's I2C or SPI controller specifications.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when high-frequency generation up to 1028 MHz is required alongside low-jitter performance. The Si5345A variant specifically supports both integer and fractional synthesis modes, offering greater flexibility than integer-only versions. Verify that the external crystal or reference clock meets the specified frequency range for optimal jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D family, which integrates MultiSynth and DSPLL technologies. The 'A' designation indicates support for integer and fractional synthesis up to 1028 MHz. The 'B04208' sequence denotes a unique factory preprogrammed configuration generated via ClockBuilder Pro software.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345A-D-GMR