8T49N240-028NLGI8

Overview

The 8T49N240-028NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It operates as a highly programmable clock generator and jitter attenuator with phase noise below 200 fs (12 kHz to 20 MHz). The device features four differential outputs supporting LVDS, LVPECL, or HCSL formats, configurable via I2C. It accepts dual inputs with signal loss monitoring and flexible switching options. Powered by 3.3V or 2.5V supplies, it utilizes OTP memory for boot configuration and includes three integer plus one fractional output divider.

Feature Summary

• Generates low phase noise clocks suitable for high-speed serial interfaces
• Supports multiple output voltage standards including LVDS and LVPECL
• Configurable operation modes for frequency synthesis and jitter attenuation

Applications

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

Procurement Notes

Verify the exact suffix against official Renesas documentation to confirm pinout and electrical specifications. Confirm current availability status as specific order codes may be subject to discontinuation notices. Ensure compatibility with required supply voltages and interface protocols before integration into the design.

Selection Notes

Select this component when designing systems requiring precise clock generation for multi-gigabit serial links. It is appropriate for applications demanding low jitter performance to minimize bit error rates. Consider its small package size and flexibility for reducing PCB area and simplifying layout in dense designs.

Part Context

This part belongs to the FemtoClock NG family of universal frequency translators. These devices are designed to provide significant system design margin for 10 Gbps and higher speed interfaces. The family allows engineers to simplify clock tree designs and reduce overall system costs through high performance and flexibility.

Replacement Considerations

Consult official substitution lists for verified alternatives such as the 8T49N241 or 8T49N242 series. Verify that any replacement maintains the required output frequencies and jitter specifications.