SI5345B-B04564-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B04564-GMR is a 10-channel, any-frequency jitter attenuator and clock multiplier from Skyworks Solutions. It utilizes fourth-generation DSPLL and MultiSynth technologies to generate output frequencies ranging from 100 Hz to 350 MHz with ultra-low jitter of 90 fs rms. The device features four inputs (differential: 8 kHz–750 MHz; LVCMOS: 8 kHz–250 MHz) and ten highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL. It operates on a core voltage of 1.8 V ±5% and I/O voltages of 3.3 V, 2.5 V, or 1.8 V. Packaged in a 64-QFN (9×9 mm), it supports free-run, synchronous, and holdover modes with programmable jitter attenuation bandwidth from 0.1 Hz to 4 kHz.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional synthesis.
• Integrates fourth-generation DSPLL and MultiSynth technologies for ultra-low jitter performance.
• Supports hitless input switching between fractionally related clocks and glitchless frequency changes.
• 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 ordering suffix B04564 against official Skyworks documentation to confirm factory preprogrammed configuration details. Ensure compatibility with ClockBuilder Pro software for final parameter validation before integration into production designs.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when applications require up to ten differential or single-ended outputs with frequencies capped at 350 MHz. The Si5345B variant is appropriate for systems prioritizing jitter attenuation over high-frequency generation exceeding 350 MHz. Verify that the 64-QFN package footprint aligns with PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of jitter attenuators, which also includes the Si5344 (4 outputs) and Si5342 (2 outputs). All variants share similar internal architectures but differ in channel count and package size. The Si5345 specifically provides the highest channel density within this series.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements include other Si5345 variants such as Si5345A-D-GMR or Si5345C-D-GMR, provided the output frequency requirements and synthesis modes (integer vs. fractional) match the application needs. Cross-referencing pinouts and electrical specifications is essential.