SI5344A-C-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344A-C-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 package. The device supports integer-only frequency synthesis with an output range of 0.001 MHz to 1028 MHz. It operates on a core voltage (VDD) of 1.8 V ±5% and an analog supply (VDDA) of 3.3 V ±5%. The operating temperature range is -40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Supports any-frequency generation using integer-only synthesis modes
• Integrates fourth-generation DSPLL technology for ultra-low jitter performance
• Includes in-circuit programmable non-volatile memory for configuration retention
• Provides glitchless input switching and holdover mode capabilities

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 10/40/100 G networking line cards
• GbE/10 GbE/100 GbE Synchronous Ethernet applications
• Carrier Ethernet switches
• SONET/SDH line cards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix 'GMR' against the manufacturer's current documentation to confirm tape and reel packaging status. Confirm that the 'C' designation strictly enforces integer-only synthesis requirements for the target design. Ensure compatibility with the required serial interface protocols before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when integer-only frequency synthesis is sufficient for the application. Verify that the 4-input, 4-output configuration meets system requirements. Ensure the design accommodates the 1.8 V core and 3.3 V analog supply voltages. Confirm that the 44-QFN package footprint aligns with the PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5345/44/42 Rev D family, which utilizes MultiSynth and DSPLL technologies. The Si5344 variant specifically provides four inputs and four outputs in a compact 7x7 mm package. It is designed for high-performance timing applications requiring precise jitter attenuation and flexible clock generation.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements within the same family include SI5344A-D-GM or SI5344A-D-GMR. Note that the 'D' suffix indicates support for both integer and fractional synthesis, whereas the 'C' suffix restricts operation to integer-only modes. Verify pinout and register compatibility when substituting.