SI5344A-D-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344A-D-GM is a low-jitter, four-output clock synthesizer and jitter attenuator. It supports any-frequency generation from any input frequency, with differential output frequencies ranging from 100 Hz to 1028 MHz and LVCMOS outputs up to 250 MHz. The device features an ultra-low jitter performance of 90 fs rms and integrates a fourth-generation DSPLL™ with MultiSynth™ technology. It operates on a single 1.8 V core supply (VDD) and a separate 3.3 V analog supply (VDDA), consuming approximately 135 mA. The component is housed in a 44-lead QFN package measuring 7x7 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 modes.
• Integrates a fully on-chip loop filter to eliminate noise coupling risks associated with discrete solutions.
• Supports hitless input clock switching between fractionally related inputs and glitchless on-the-fly output frequency changes.
• Includes in-circuit programmable non-volatile memory for automatic 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 part number against the manufacturer's current datasheet to ensure compatibility with required frequency plans and packaging options. Confirm that the selected variant matches the necessary output frequency range and interface requirements for the target application design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the SI5344A-D-GM when high-frequency outputs up to 1028 MHz are required with integer and fractional synthesis capabilities. Ensure the design accommodates the dual-supply requirement of 1.8 V for the core and 3.3 V for the analog section. Utilize ClockBuilder Pro software for optimal configuration of loop bandwidth and output formats.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The SI5344A-D-GM belongs to the Si5345/44/42 Rev D family of jitter attenuators. It shares the same 44-QFN 7x7 mm package and core architecture as the Si5344B, C, and D variants, differing primarily in supported output frequency ranges and synthesis modes. It is designed for applications requiring precise clock distribution and jitter cleaning.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements within the same package include other Si5344 variants such as Si5344B-D-GM or Si5344C-D-GM, provided their specific frequency and synthesis constraints meet the design requirements. Verify pinout and electrical specifications before substitution.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum differential output frequency for the SI5344A-D-GM?

The maximum differential output frequency for the SI5344A-D-GM is 1028 MHz.

Does the SI5344A-D-GM support hitless input switching?

Yes, the device supports hitless input switching between two clock inputs that have a fixed phase relationship or are fractionally related.

What supplies are required for operation?

The device requires a 1.8 V ±5% core voltage (VDD) and a 3.3 V ±5% analog voltage (VDDA).