8T49N240-034NLGI8

Overview

The Renesas 8T49N240-034NLGI8 is a FemtoClock NG universal frequency translator and jitter attenuator. It operates with a supply voltage of 2.375V to 3.465V and supports input frequencies up to 875 MHz. The device provides four differential outputs capable of reaching 867 MHz, utilizing LVDS, LVPECL, or HCSL formats. Packaged in a 40-VFQFN (6mm x 6mm) with an exposed pad, it features dual inputs with signal loss monitoring. The component integrates OTP memory for configuration storage and includes three integer and one fractional output dividers.

Feature Summary

• Ultra-low phase noise performance below 200 fs (12 kHz to 20 MHz)
• Dual inputs with flexible switching and signal loss monitoring
• Four differential outputs configurable as LVDS, LVPECL, or HCSL
• Integrated OTP memory for autonomous startup configurations

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

Procurement Notes

Verify the specific suffix '034' against official Renesas documentation to confirm exact frequency programming and pinout compatibility. Confirm RoHS3 compliance status and check for End-of-Life notices via Product Change Notices. Ensure ESD handling protocols are followed during surface mount assembly of the VFQFN package.

Selection Notes

Select this component when designing for 10G/40G/100G interfaces requiring low jitter margins. The 200 fs phase noise specification allows for cost-effective PCB designs compared to higher-jitter alternatives. Verify that the required output voltage levels match the available LVPECL, LVDS, or HCSL options provided by the device.

Part Context

This part belongs to the Renesas FemtoClock NG family, designed for high-performance clock synthesis. It serves as a flexible solution for generating precise clock signals from various input sources, replacing multiple discrete clock generators and reducing board space requirements in high-speed digital systems.

Replacement Considerations

Consult the official Renesas cross-reference guide for verified substitutes. Potential family members include other 8T49N240 variants with different suffixes or the 8T49N241 series for similar functionality.