8T49N240-997NLGI

Overview

The 8T49N240-997NLGI is a clock synthesizer and jitter cleaner from Renesas Electronics, part of the FemtoClock NG family. It features an ultra-performance jitter attenuator architecture designed for high-speed networking applications. The device supports up to four output channels with a maximum output frequency of 867 MHz and accepts input frequencies up to 875 MHz. Operating within a supply voltage range of 2.375 V to 3.465 V, it functions reliably in temperatures from -40°C to +85°C. Packaged in a 40-pin VFQFN, this component integrates advanced PLL technology to ensure signal integrity in demanding environments.

Feature Summary

• Ultra-performance jitter attenuation capabilities for high-speed data transmission
• Supports up to 4 independent output channels with frequencies up to 867 MHz
• Accepts input clock frequencies ranging up to 875 MHz
• Operates on a single supply voltage between 2.375 V and 3.465 V

Applications

• 10G/40G/100G SONET/SDH network line cards
• Carrier Ethernet switches requiring precise timing
• Wireless base station baseband units
• Test and measurement equipment

Procurement Notes

Verify the specific suffix '997NLGI' against official Renesas documentation to confirm boot configuration and packaging details. Ensure compatibility with I2C programming interfaces if custom frequency configurations are required. Confirm moisture sensitivity levels and reflow soldering profiles prior to assembly.

Selection Notes

Select this model when low phase jitter and hitless switching are critical for system stability. Compare against other FemtoClock NG variants like the 8T49N242 or 8T49N286A based on the number of required PLLs and output formats. Verify that the 867 MHz maximum output frequency meets the target application's bandwidth requirements.

Part Context

This component belongs to the 8T49N240 series, which utilizes fourth-generation FemtoClock NG PLL technology. The series is designed to replace traditional crystal oscillators with programmable solutions, offering flexibility in generating multiple clock frequencies from a single reference source while maintaining strict jitter specifications.

Replacement Considerations

Consult official cross-reference guides for direct substitutes. Potential alternatives within the same family include the 8T49N242 or 8T49N286A, depending on whether additional PLLs or different output drive strengths are needed. Always verify pin-to-pin compatibility and register settings before substitution.