SI5345B-B04564-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B04564-GM is a 10-output jitter attenuator and clock multiplier from the Si5345 family. It supports any-frequency generation with output frequencies up to 350 MHz. The device features four inputs, accepting differential signals up to 750 MHz or LVCMOS up to 250 MHz. It utilizes fourth-generation DSPLL technology for ultra-low jitter performance of 90 fs rms. The component operates on a core voltage of 1.8 V ±5% and an analog supply of 3.3 V ±5%. It is housed in a 64-QFN package measuring 9x9 mm and functions within a temperature range of -40 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.
• Integrates fourth-generation DSPLL and MultiSynth technologies for high-performance jitter attenuation.
• Supports free-run, synchronous, and holdover modes with automatic or manual input clock switching.
• Features fully integrated loop filter and digitally programmable jitter attenuation bandwidth.

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 availability status through authorized distributors as stock levels fluctuate. Ensure the serial interface configuration matches the system requirements before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when ten independent output clocks are required with frequencies capped at 350 MHz. Verify that the input signal type aligns with the supported differential or LVCMOS ranges. Consider the 64-QFN package dimensions for PCB layout constraints and ensure thermal management meets the specified operating temperature range.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D series, which combines DSPLL and MultiSynth technologies. The 'B' designation indicates a maximum output frequency limit of 350 MHz, distinguishing it from higher-frequency variants like the 'A' or 'C' models. The part is designed for applications requiring precise clock synchronization and low jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-D-GM

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the SI5345B variant?

The SI5345B variant supports output frequencies up to 350 MHz.

Does the device support glitchless input switching?

Yes, the device can switch between input clock frequencies up to ±500 ppm apart without abrupt phase changes at the output.

How is the loop filter implemented in this component?

The loop filter is fully integrated on-chip, eliminating the risk of noise coupling associated with discrete solutions.