SI5344A-C-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344A-C-GM is a jitter attenuator and clock multiplier featuring four inputs and four outputs in a 44-QFN package. It supports integer-only frequency synthesis with output frequencies ranging from 100 Hz to 1028 MHz for differential signals and up to 250 MHz for LVCMOS. Input frequencies range from 8 kHz to 750 MHz (differential) or 250 MHz (LVCMOS). The device operates on a core voltage of 1.8 V ±5% and an I/O supply of 3.3 V ±5%, consuming typical current at -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Combines fourth-generation DSPLL and MultiSynth technologies for any-frequency generation
• Supports hitless input switching between fractionally related clocks
• Includes programmable jitter attenuation bandwidth and holdover modes
• Features in-circuit programmable non-volatile memory for configuration retention

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 official documentation to confirm the exact functional variant, as suffixes define synthesis mode and packaging. Confirm that the required factory pre-programmed configuration matches the intended application design before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when integer-only synthesis is sufficient for the target frequency plan. Ensure the design accommodates the 44-QFN 7x7 mm footprint and provides separate power supplies for the 1.8 V core and 3.3 V I/O domains. Verify compatibility with the ClockBuilder Pro software for generating the necessary configuration files.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. The 'C' designation indicates integer-only synthesis capability, distinguishing it from 'A' variants which support fractional synthesis. It shares the same physical package and pinout as other members of the series but differs in internal PLL architecture.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements within the same family include the SI5344A-D-GM for fractional synthesis requirements or the SI5344B-D-GM for lower frequency ranges. Cross-family substitution requires verification of pin compatibility and register mapping differences.