SI5345B-B06263-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B06263-GM is a 10-output jitter attenuator and clock multiplier from the Si5345 family, manufactured by Skyworks Solutions. 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. Output frequencies range from 100 Hz to 350 MHz for differential formats and up to 250 MHz for LVCMOS. It operates on a single 1.8 V core supply (VDD) and a 3.3 V analog supply (VDDA), with independent output supplies configurable for 3.3 V, 2.5 V, or 1.8 V. The component is housed in a 64-QFN package measuring 9x9 mm and 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 integer and fractional synthesis.
• Features ultra-low jitter performance of 90 fs rms with digitally programmable jitter attenuation bandwidth.
• Supports hitless input clock switching, free-run modes, and holdover capabilities with glitchless output changes.
• Includes in-circuit programmable non-volatile memory for persistent configuration storage.

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 datasheet to confirm factory preprogramming details. Ensure compatibility with the required serial interface protocol (I2C or SPI) and check for moisture sensitivity handling requirements during assembly. Confirm that the external crystal specifications align with the recommended 48 MHz to 54 MHz range for optimal jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when ten independent output clocks are required with flexible frequency synthesis capabilities. The Si5345B variant specifically limits output frequencies to 350 MHz, which suits most standard networking and telecom applications. Consider the integrated loop filter and NVM features if board space optimization and power-on reliability are critical design constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. The Si5345 variant is distinguished by its 10-output capacity and 64-pin QFN package, compared to the 4-output Si5344 and 2-output Si5342 variants. The 'B' designation indicates a maximum output frequency limit of 350 MHz, distinguishing it from the 'A' and 'C' variants which support higher frequencies up to 1028 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements within the same family include SI5345A-D-GM for higher frequency requirements or SI5345C-D-GM for integer-only synthesis. For fewer outputs, SI5344B-D-GM may be suitable if pin count reduction is desired. Verify that any substitute maintains the required 64-QFN footprint and voltage supply configurations.