8T49N240-031NLGI

Overview

The 8T49N240-031NLGI 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, generating up to four independent output frequencies ranging from 8kHz to 1.0GHz. The device supports LVPECL, LVDS, HCSL, and LVCMOS output levels and accepts multiple input clock sources including crystals and differential clocks. Configuration is managed via an I2C interface or external EEPROM, ensuring compliance with SONET/SDH and SyncE standards for high-speed networking applications.

Feature Summary

• Generates up to four independent output frequencies (8kHz to 1.0GHz) using a single fractional-feedback PLL
• Supports LVPECL, LVDS, HCSL, and LVCMOS output voltage levels
• Accepts multiple input sources including fundamental-mode crystals and differential clock inputs
• Configurable via I2C interface or external I2C EEPROM for flexible deployment

Applications

• 10G/40G/100G SONET/SDH network line cards
• Ethernet network line cards requiring G.8262 compliance
• Wireless base station baseband units
• Carrier Ethernet switches and OTN equipment

Part Context

This component belongs to the FemtoClock NG family of timing devices. The product portfolio has been acquired by SiTime, with transition activities expected to complete by the end of 2026. Documentation and samples remain available through Renesas channels during this period.

Replacement Considerations

SiTime has acquired the Renesas timing product portfolio. For new designs, procurement, and technical support, consult SiTime.com or contact [email protected] after the transition period concludes at the end of 2026.