SI5345D-B04246-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345D-B04246-GMR is a jitter attenuator and clock multiplier from the Si5345 family, manufactured by Skyworks Solutions Inc. It features four inputs and ten outputs housed in a 64-QFN package measuring 9x9 mm. 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 signals 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%, with a specified operating temperature range of -40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Combines fourth-generation DSPLL and MultiSynth technologies for any-frequency generation and jitter attenuation
• Supports free-run, synchronous, and holdover modes with automatic or manual input clock switching
• Features fully integrated loop filter and digitally programmable jitter attenuation bandwidth
• Includes in-circuit programmable non-volatile memory for known power-up configuration

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 tape-and-reel packaging and factory preprogramming status. Ensure compatibility with ClockBuilder Pro software for configuration. Check for RoHS compliance and moisture sensitivity levels prior to assembly.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when output frequencies are required up to 350 MHz. For applications requiring frequencies up to 1028 MHz, consider the Si5345A variant. Verify that the 64-QFN package dimensions fit the PCB layout constraints and that the serial interface requirements match the system controller capabilities.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D series, which utilizes MultiSynth technology. The 'D' designation indicates a maximum output frequency limit of 350 MHz, distinguishing it from the 'A' and 'C' variants which support higher frequencies. The part is designed for high-performance timing applications requiring low jitter and flexible clock distribution.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The SI5345B-D-GMR is a compatible alternative within the same family offering identical pinout and functionality but may differ in factory preconfiguration settings. Verify register maps and NVM contents when substituting to ensure functional equivalence.