SI5345D-B03996-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345D-B03996-GMR is a 10-channel jitter attenuator and clock multiplier from the Si5345 family. It features four inputs and ten outputs housed in a 64-QFN package. The device supports differential input frequencies up to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential signaling and up to 250 MHz for LVCMOS. It operates on a core voltage of 1.8 V ±5% and an I/O supply of 3.3 V ±5%. The component functions within 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 fourth-generation DSPLL technology.
• Supports hitless input clock switching between fractionally related clocks with automatic or manual selection.
• Includes programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz for optimized performance.
• Features 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 B03996 suffix against the design requirements, as this identifier denotes a unique numerical sequence representing the preprogrammed settings rather than a standard functional variant. Confirm that the required serial interface protocol and NVM data match the target system initialization needs before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when fractional synthesis is required alongside low-jitter performance up to 350 MHz. Ensure the application utilizes the 64-QFN footprint and accommodates the dual voltage supplies. Verify compatibility with ClockBuilder Pro software for generating the necessary register map and NVM data for the specific B03996 configuration.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D family, which integrates MultiSynth dividers and a DSPLL for high-performance clock generation. The Si5345 variant specifically provides four inputs and ten outputs, distinguishing it from the Si5344 (four outputs) and Si5342 (two outputs). The 'D' designation indicates support for output frequencies up to 350 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The SI5345B-D-GMR serves as a functional equivalent within the same series offering identical pinout and core capabilities. Factory preprogrammed variants such as SI5345D-Bxxxxx-GM may be substituted if the specific B03996 configuration is unavailable, provided the new part's programmed parameters align with the circuit design.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum differential output frequency supported by the SI5345D?

The SI5345D supports a maximum differential output frequency of 350 MHz.

How does the device handle input clock loss?

The device automatically enters holdover mode using stored historical frequency data when the selected input clock becomes invalid and no other valid inputs are available.

Can the device switch between inputs without glitches?

Yes, the device supports glitchless input switching for frequencies up to ±500 ppm apart and hitless switching for fractionally related frequencies.