8T49N240-021NLGI

Overview

The Renesas 8T49N240-021NLGI is a FemtoClock NG Universal Frequency Translator designed for high-performance clock generation and jitter attenuation. It features four differential outputs capable of LVDS, LVPECL, or HCSL formats, operating from 8 kHz to 867 MHz. The device integrates three integer and one fractional output divider, enabling flexible frequency synthesis from various input sources. With phase noise below 200 fs (12 kHz to 20 MHz), it provides significant design margin for 10 Gbps and higher-speed interfaces. The component utilizes a 6 mm x 6 mm 40-VFQFN package and supports boot configurations via OTP memory or external EEPROM.

Feature Summary

• Phase noise specification below 200 fs (12 kHz to 20 MHz) for low-jitter performance
• Four differential outputs configurable as LVDS, LVPECL, or HCSL
• Frequency range of 8 kHz to 867 MHz with three integer and one fractional dividers
• Dual inputs with signal loss monitoring and flexible switching options

Applications

• 10 Gbps, 40 Gbps, and 100 Gbps routers
• Wireless access network backhaul systems
• Redundant 40 Gbps and 100 Gbps data center switches
• OTU2 and OTU3 OTN multiplexers
• Xilinx Virtex UltraScale FPGA timing

Part Context

The 8T49N240 belongs to the FemtoClock NG family of universal frequency translators. This series is engineered to replace multiple discrete clock components with a single highly programmable IC, reducing PCB area and system complexity. The specific -021 suffix denotes a factory-programmed configuration variant within this product line.