8T49N286NLGI8

Application Specific Clock/Timing Overview

The 8T49N286NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It features a single fractional-feedback PLL capable of jitter attenuation or frequency synthesis. The device supports up to eight differential outputs, configurable as LVPECL, LVDS, HCSL, or LVCMOS, with maximum frequencies reaching 1 GHz for differential and 250 MHz for LVCMOS. It accepts multiple input clock types including LVPECL, LVDS, LVHSTL, HCSL, and LVCMOS. Key electrical parameters include an operating voltage range of 2.375V to 3.465V and an RMS phase jitter specification of 0.276ps (including spurs) within the 12kHz to 20MHz bandwidth.

Application Specific Clock/Timing Feature Summary

• Single fractional-feedback PLL architecture supporting both frequency translation and jitter attenuation modes.
• Up to eight selectable output channels with flexible configuration across LVPECL, LVDS, HCSL, and LVCMOS levels.
• Hitless switching capability between auto and manual input clock selection with monitoring support.
• Programmable via I²C interface or external I²C EEPROM for flexible deployment.

Application Specific Clock/Timing Applications

• 10G/40G/100G SONET/SDH and Ethernet network line cards.
• Wireless base station baseband units.
• GbE/10GbE/100GbE Synchronous Ethernet line card applications requiring G.8262 compliance.
• Carrier Ethernet switches and OTN equipment.
• Test and measurement instrumentation.

Application Specific Clock/Timing Procurement Notes

Verify the exact suffix against official Renesas documentation, as variations such as -999NLGI8 indicate specific boot configurations like power-up disabled states. Confirm package type and moisture sensitivity level (MSL) requirements during procurement planning. Ensure compatibility with Timing Commander software tools for register programming and configuration management.

Application Specific Clock/Timing Selection Notes

Select this component when a single PLL solution is required to generate up to eight independent output frequencies from various input references. It is suitable for designs needing low jitter performance (0.276ps typical) and flexible output drive strengths. Consider the 72-VFQFN package constraints and verify thermal dissipation capabilities for the target application environment.

Application Specific Clock/Timing Part Context

This part belongs to the FemtoClock NG family of universal frequency translators. It shares architectural similarities with other members like the 8T49N242 but offers higher output channel counts. The series is designed to meet stringent timing standards for high-speed networking and telecommunications infrastructure.

Application Specific Clock/Timing Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate alternative models within the 8T49N2xx series based on PLL count and output channel requirements, ensuring pinout and electrical parameter compatibility before substitution.