SI5345B-D06782-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-D06782-GM is a factory preprogrammed clock multiplier and jitter attenuator from the Si5345 Rev D family. It features four inputs and ten outputs, supporting any-frequency generation with an output range up to 350 MHz. The device utilizes fourth-generation DSPLL technology for ultra-low jitter performance of 90 fs rms. It operates on a 1.8 V core voltage and 3.3 V analog supply within a temperature range of –40 °C to +85 °C. Configuration is managed via I2C or SPI interfaces, with settings stored in non-volatile memory.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis.
• Provides ultra-low jitter attenuation of 90 fs rms with digitally programmable loop bandwidth.
• Supports hitless input switching between fractionally related clocks and glitchless on-the-fly frequency changes.
• Includes in-circuit programmable non-volatile memory for reliable 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 numerical suffix against the manufacturer's ordering guide to confirm the exact preprogrammed frequency plan. Factory preprogrammed devices are assigned unique part numbers based on the configuration generated by ClockBuilder Pro software. Ensure the required configuration matches the factory preset before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a fixed, factory-configured solution is preferred over field-programmable alternatives. The 'B' designation indicates support for output frequencies up to 350 MHz. Verify that the required input/output signal formats (LVDS, LVPECL, LVCMOS, CML, HCSL) are compatible with the application requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D series, which integrates fourth-generation DSPLL and MultiSynth technologies. The Si5345 variant specifically provides four inputs and ten outputs in a 64-QFN package. The Rev D revision includes updated features such as Fastlock and improved holdover capabilities compared to previous generations.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-D-GM

Clock Generators, PLLs, Frequency Synthesizers FAQ

How is the device configured if it is factory preprogrammed?

The device is programmed at the factory with a specific frequency plan defined by the numerical sequence in the part number. Configuration can still be modified via the serial interface, but the default startup state is determined by the NVM content.

What is the maximum output frequency supported by the Si5345B variant?

The Si5345B variant supports output frequencies up to 350 MHz. Other variants in the family, such as Si5345A, support frequencies up to 1028 MHz.

Does the device support automatic input clock switching?

Yes, the device features an automatic input selection state machine that chooses valid inputs based on user-defined priorities and revertive options.