SI5344H-D-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Si5344H is a high-frequency, ultra-low jitter attenuating clock multiplier featuring fourth-generation DSPLL and MultiSynth technologies. It supports up to four outputs in High Frequency Mode, reaching 2.75 GHz with typical phase jitter of 50 fs-rms (1 MHz–40 MHz). Alternatively, MultiSynth Mode provides any-frequency outputs up to 717.5 MHz with <150 fs-rms typical jitter (12 kHz–20 MHz). The device accepts input frequencies from 8 kHz to 750 MHz and includes DCO-control with 0.001 ppb step resolution. It operates on a 1.8 V core and 3.3 V analog supply, housed in a QFN44 package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Combines fourth-generation DSPLL with MultiSynth technology for flexible frequency generation
• Supports glitchless on-the-fly output frequency changes and hitless input clock switching
• Features fully integrated loop filter to eliminate discrete noise coupling risks
• Includes in-circuit programmable non-volatile memory for known power-up configurations

Clock Generators, PLLs, Frequency Synthesizers Applications

• 100G/200G/400G Optical Transceivers
• Wireless base-stations
• Clocking Forward Error Correction (FEC) circuits

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official guide to ensure correct package type, temperature range, and pre-programming options. Confirm that the selected variant matches the required input/output configuration and voltage levels for your design. Always reference the latest datasheet revision for accurate pin assignments and electrical specifications before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Choose the Si5344H when four independent outputs are required, as opposed to the two-output Si5342H. Ensure the application requires High Frequency Mode capabilities up to 2.75 GHz or MultiSynth flexibility below 717.5 MHz. Verify that the system can accommodate the 1.8 V core and 3.3 V analog supply requirements. Use ClockBuilder Pro software to validate jitter performance and loop bandwidth settings for the specific frequency plan.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The Si5344H belongs to the Skyworks Si534x family of jitter attenuators. It shares architectural similarities with the Si5342H but offers double the output count. Both devices utilize the same QFN44 package and core technologies, including DSPLL and MultiSynth. The family is designed for coherent optical transceiver designs requiring precise clock distribution and low phase noise performance across varying environmental conditions.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The Si5342H is a compatible alternative if only two outputs are needed. No other direct substitutes are documented in the provided datasheet.