8T49N1012-004NLGI8

Overview

The 8T49N1012-004NLGI8 is a clock synthesizer and jitter cleaner from the FemtoClock NG family. It features one fractional-feedback PLL for frequency synthesis, two integer outputs, and eight fractional outputs. The device supports LVPECL output formats and operates within a supply voltage range of 2.375V to 3.465V. It is housed in a 32-VFQFN exposed pad package with dimensions of 5x5 mm. The component functions as a multi-output frequency synthesizer designed for low-jitter applications.

Feature Summary

• Integrates a single fractional-feedback PLL for precise frequency synthesis
• Provides mixed output configuration with dedicated integer and fractional channels
• Supports LVPECL differential output signaling standards
• Operates within a specified wide temperature range for industrial reliability

Applications

• Low-power embedded designs requiring stable timing sources
• Data communication systems needing jitter-cleaned clock signals
• Telecommunications infrastructure equipment
• Industrial control systems utilizing precision clock distribution

Procurement Notes

This component is officially designated as End-of-Life (EOL) by Renesas Electronics Corporation. Manufacturers have issued discontinuance notifications indicating that production will cease. Current availability is limited to existing stock or last-time buys. Engineers must verify the specific discontinuance date and last-order deadline through official Renesas Product Change Notifications (PCN) before finalizing design-in decisions. Alternative sourcing strategies should be evaluated immediately due to the confirmed obsolescence status.

Selection Notes

Select this part only if the specific 1:10 output ratio and LVPECL interface requirements align with the system architecture. Verify compatibility with the required input frequencies and phase noise specifications against the datasheet limits. Consider the thermal performance of the 32-VFQFN package under maximum load conditions. Ensure the design can accommodate the transition to alternative components given the EOL status. Review the complete electrical characteristics table for voltage and current constraints.

Part Context

The 8T49N1012 belongs to the FemtoClock NG series, which focuses on low-jitter clock generation. This specific model provides a high channel count suitable for complex multi-clock domain systems. It replaces older generations of clock synthesizers by offering improved jitter attenuation capabilities. The device integrates programmable features to reduce external component count compared to discrete solutions.

Replacement Considerations

• 8T49N1012-103NLGI8
• 8T49N241-998NLGI8

FAQ

What is the output configuration of the 8T49N1012?

The device provides ten total outputs, consisting of two integer outputs and eight fractional outputs.

Does the 8T49N1012 support fractional feedback PLL?

Yes, it includes one fractional-feedback PLL capable of frequency synthesis.