SI5394C-A-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5394C-A-GM is a clock synthesizer and jitter cleaner from Skyworks Solutions, utilizing fourth-generation DSPLL technology. 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 0.0001 to 1028 MHz. It requires an external crystal or oscillator reference. Key electrical parameters include a core voltage (VDD) of 1.8 V ±5% and a digital supply (VDDA) of 3.3 V ±5%. The operating temperature range is specified from -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 for ultra-low jitter performance
• Features enhanced hitless switching to minimize phase transients during input clock changes
• Includes in-circuit programmable non-volatile memory for persistent configuration

Clock Generators, PLLs, Frequency Synthesizers Applications

• 56G/112G PAM4 SerDes clocking
• OTN muxponders and transponders
• 10/40/100/200/400G networking line cards
• Medical imaging systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure compatibility with required frequency plans and packaging options. Confirm that the external crystal specifications align with the device's requirements for optimal jitter performance. Check for any product change notifications that may affect pinout or electrical characteristics before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when integer-only synthesis meets the design requirements, as it offers a cost-effective alternative to fractional modes. Ensure the application utilizes an external crystal reference, as integrated references are reserved for J/K/L/M/E grades. Verify that the 4-input, 4-output topology fits the system architecture and that the 44-QFN package dimensions are compatible with the PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5394 family, which provides four outputs. It serves as a drop-in replacement for the Si5344 series. The 'C' grade designation indicates integer-only synthesis capability, distinguishing it from 'A' and 'B' grades which support fractional modes. The '-GM' suffix denotes the standard lead-free tray packaging format.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The Si5394C-A-GM is designed as a direct drop-in replacement for the Si5344 series devices. When substituting, verify that the legacy design does not rely on fractional synthesis features unavailable in the C-grade integer-only mode.