SI5345D-B04500-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345D-B04500-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 measuring 9x9 mm. The device supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential signals and up to 250 MHz for LVCMOS. It operates on a core voltage of 1.8 V ±5% and an auxiliary voltage of 3.3 V ±5%. The unit 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.
• Provides ultra-low jitter performance with a specified root mean square value of 90 fs.
• Supports hitless input clock switching between fractionally related clocks and glitchless on-the-fly output frequency changes.
• 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 against the manufacturer's current documentation to confirm packaging options such as tape and reel or cut tape. Ensure that the factory preprogrammed configuration matches the required application parameters before finalizing procurement. Cross-reference the datasheet revision to confirm compatibility with existing system designs.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when high channel count and low jitter are required. The 'D' variant limits maximum output frequency to 350 MHz; choose 'A' or 'C' variants if higher frequencies or integer-only synthesis are needed. Verify that the serial interface requirements align with the system's I2C or SPI capabilities. Confirm thermal management strategies for the QFN-64 package under maximum load conditions.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5345/44/42 Rev D series of jitter attenuators. The Si5345 model specifically provides four inputs and ten outputs, distinguishing it from the Si5344 (four outputs) and Si5342 (two outputs). All models share similar internal architectures but differ in pin counts and output configurations.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other SKUs within the Si5345 family, such as SI5345B-D-GM or SI5345A-D-GM, depending on frequency requirements. Ensure that the replacement part supports the necessary output formats and input frequencies for the target application.