SI5345B-B04703-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345B-B04703-GMR is a jitter attenuator and clock multiplier featuring four inputs and ten outputs. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate any frequency combination from any input source. The device supports differential inputs up to 750 MHz and LVCMOS inputs up to 250 MHz, with output frequencies ranging from 100 Hz to 350 MHz for the B-series variant. It operates on a 1.8 V core voltage and 3.3 V I/O supply within a -40°C to +85°C temperature range. The component is housed in a 64-QFN 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 sources
• Includes in-circuit programmable non-volatile memory for known power-up configurations

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 suffix B04703 against the target design requirements. Confirm that the GMR tape-and-reel packaging aligns with automated assembly processes. Ensure the serial interface protocol matches the system controller capabilities.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when an output frequency limit of 350 MHz is sufficient, as higher-frequency variants exist within the Si5345 family. Verify compatibility with required output signal formats such as LVDS, LVPECL, or HCSL. Ensure the application benefits from the integrated loop filter and digital jitter attenuation bandwidth control.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D family, which combines DSPLL and MultiSynth technologies. The 'B' designation indicates a maximum output frequency of 350 MHz, distinguishing it from the 'A' and 'C' variants that support frequencies up to 1028 MHz. The part is designed for high-performance clock generation in telecommunications and datacom infrastructure.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5345A-D-GMR offers higher output frequencies up to 1028 MHz. Si5345D-D-GMR provides similar 350 MHz output limits but may differ in internal synthesis modes. Verify pinout and register compatibility before substituting.