8V19N474BFGI

Overview

The 8V19N474BFGI is a FemtoClock NG Jitter Attenuator and Clock Synthesizer designed for high-performance clock conditioning. It features a two-stage PLL architecture utilizing an external VCXO for jitter attenuation and an internal 2500MHz VCO for frequency synthesis. The device provides five independent frequency dividers, including fractional-divider capabilities, to generate precise output frequencies. It supports LVDS and LVPECL output levels with a maximum input frequency of 2 GHz and operates on a single 3.3V supply.

Feature Summary

• Two-stage PLL architecture with external VCXO for jitter attenuation and internal 2500MHz VCO for synthesis
• Five independent frequency dividers supporting integer and fractional ratios
• Supports hitless switching and manual/automatic clock selection between redundant inputs
• SPI interface configuration with status monitoring and fault reporting

Applications

• 10/40/100/400 Gigabit-Ethernet line cards
• Wireless infrastructure converter circuits
• Radar and imaging systems
• Instrumentation and medical equipment

Procurement Notes

Verify the specific suffix 'BFGI' against official Renesas documentation to confirm package type and moisture sensitivity level. Confirm current production status as FemtoClock products may have limited availability or obsolescence notices. Ensure the required external VCXO is compatible with the device's input specifications.

Selection Notes

Select this component when low phase noise performance is critical for driving physical layer devices. The two-stage PLL design requires an external VCXO; ensure board space allows for this additional component. Verify that the required output frequencies can be synthesized using the available integer and fractional dividers from the target input range.

Part Context

This part belongs to the 8V19N490A series within the FemtoClock family. It shares architectural similarities with other jitter attenuators in the lineup but is optimized for specific Ethernet and wireless applications requiring precise phase noise management and multiple clock outputs.

Replacement Considerations

Direct replacements must support similar jitter attenuation specs and external VCXO requirements. Check for updated revisions within the 8V19N4xx series. Cross-model compatibility depends on pinout and register configuration alignment.