SI5345B-B03147-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B03147-GMR is a jitter attenuator and clock multiplier from the Si5345 family, manufactured by Skyworks Solutions. 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 formats and up to 250 MHz for LVCMOS. It operates on a core voltage of 1.8 V ±5% and an auxiliary 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 and MultiSynth technologies.
• Supports free-run, synchronous, and holdover modes with automatic or manual hitless input clock switching.
• Features fully integrated loop filters and digitally programmable jitter attenuation bandwidth for optimized performance.
• 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 ordering suffix B03147 against the manufacturer's current documentation to confirm factory preprogrammed configurations. Ensure compatibility with I2C or SPI serial interfaces and check for RoHS-6 compliance requirements. Confirm package dimensions match the 9x9 mm 64-QFN specification before integration into the design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when ultra-low jitter performance near 90 fs rms is required alongside flexible frequency synthesis capabilities. The Si5345B variant specifically limits maximum output frequency to 350 MHz, which suits applications not requiring the higher speeds available in the Si5345A series. Consider the availability of ClockBuilder Pro software for efficient configuration and programming of the internal registers.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuating clock multipliers. The Si5345 variant provides the highest channel count with four inputs and ten outputs. It utilizes advanced PLL technology to provide superior jitter cleaning and multiplication compared to standard oscillators, making it suitable for high-speed digital communication systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5345A-D-GMR offers higher output frequencies up to 1028 MHz. Si5345C-D-GMR provides integer-only synthesis. Si5344B-D-GMR reduces output channels to four. Verify electrical specifications and pinout compatibility before substituting.