SI5344A-B05755-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344A-B05755-GMR is a jitter attenuator and clock multiplier from the Si5344 family, manufactured by Skyworks Solutions. It features four inputs and four outputs housed in a 44-QFN 7x7 mm package. The device supports integer and fractional frequency synthesis with an output range of 0.001 to 1028 MHz. It achieves ultra-low jitter performance of 90 fs rms and integrates a fourth-generation DSPLL with MultiSynth technology. Operating temperatures range from -40 to +85 °C, and it utilizes I2C or SPI serial interfaces for configuration.

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 clocks without phase offset propagation.
• 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 tape and reel packaging status. Ensure compatibility with the required frequency plan before procurement, as factory preprogrammed variants exist. Confirm RoHS-6 compliance and Pb-free status through official datasheets. Check for availability of ClockBuilder Pro software support for the specific revision.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when four differential or single-ended outputs are required within a compact 44-QFN footprint. Choose the 'A' variant for full integer and fractional synthesis capabilities up to 1028 MHz. Ensure the application requires the integrated DSPLL jitter attenuation rather than simple buffering. Verify that the system can accommodate the 1.8 V core and 3.3 V analog supply requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5345/44/42 Rev D family, which combines fourth-generation DSPLL and MultiSynth technologies. The Si5344 specifically offers four inputs and four outputs, distinguishing it from the ten-output Si5345 and two-output Si5342 models. All variants share similar functional blocks but differ in pin count and output capacity.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344A-D-GM1 and Si5344A-D-GM2 are direct package alternatives within the same series. Factory preprogrammed versions may be available under custom ordering part numbers assigned by Skyworks. Verify electrical specifications and pinout compatibility before substituting.