8T49N240-021NLGI8

Overview

The Renesas 8T49N240-021NLGI8 is a specialized clock generator and jitter attenuator belonging to the FemtoClock NG family. It is designed for high-performance timing applications requiring low phase noise and precise frequency synthesis. The device integrates a Phase-Locked Loop (PLL) and Voltage-Controlled Oscillator (VCO) to generate stable clock signals from various input sources. It supports multiple output configurations and includes an on-chip EEPROM for configuration storage, ensuring robust operation in demanding digital systems.

Feature Summary

• Integrates ultra-low phase noise PLL and VCO technology for superior signal integrity
• Features on-chip non-volatile EEPROM for persistent configuration retention without external memory
• Supports flexible input/output architectures with programmable frequency multiplication and division
• Includes advanced jitter attenuation capabilities to clean noisy reference clocks

Applications

• High-speed serial communication interfaces such as PCIe and Ethernet
• Data center infrastructure and server motherboard clocking
• Telecommunications base stations and network equipment
• Industrial automation control systems requiring precise timing

Procurement Notes

Verify the specific suffix '021' against official Renesas documentation to confirm exact pinout, voltage levels, and package type. Ensure compatibility with existing board layouts and power supply requirements before integration. Check for recent Product Change Notifications (PCNs) regarding material or assembly site changes that may affect qualification.

Selection Notes

Select this component when ultra-low jitter performance is critical for system stability. Compare against other FemtoClock variants based on required output count and specific frequency ranges. Consider the integrated EEPROM feature if minimizing external component count is a priority. Validate thermal performance within the intended operating temperature range.

Part Context

This part belongs to the Renesas FemtoClock NG series, known for high-frequency precision and low phase noise. It complements other timing solutions by offering integrated synthesis and attenuation in a compact form factor. The series is widely used in high-speed data transmission environments where signal quality directly impacts system throughput and reliability.

FAQ

Does the 8T49N240-021NLGI8 require an external EEPROM?

No, it features on-chip non-volatile EEPROM for storing configuration data, eliminating the need for external memory components.

What is the primary function of the internal PLL in this device?

The internal PLL synthesizes stable output frequencies from input references while significantly reducing input jitter through its low-phase-noise architecture.

Is the device suitable for automotive applications?

Specific automotive qualification status should be verified via the official datasheet, as standard versions are typically designed for industrial and commercial telecom/datacom environments.