8T49N240-035NLGI

Overview

The 8T49N240-035NLGI is a clock synthesizer and jitter attenuator manufactured by Renesas Electronics. It belongs to the FemtoClock NG family, designed for high-performance timing applications. The device integrates a Phase-Locked Loop (PLL) to generate precise clock signals from reference inputs or internal oscillators. Key specifications include support for multiple output formats such as LVPECL, LVDS, and LVCMOS, with frequencies up to 1 GHz. It features low RMS phase jitter performance, typically in the range of hundreds of femtoseconds, ensuring signal integrity for high-speed digital systems. The component is programmable via an I²C interface.

Feature Summary

• Integrates fourth-generation FemtoClock NG PLL technology for low-phase noise performance
• Supports up to eight selectable outputs configurable as LVPECL, LVDS, or LVCMOS
• Accepts differential input levels including LVPECL, LVDS, and HCSL
• Programmable via I²C interface for custom frequency configurations

Applications

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

Procurement Notes

Mouser currently lists this part number as having limited availability or being out of stock. The product may be subject to limited sales or factory special orders. Users should verify current supply status directly with authorized distributors or the manufacturer before design finalization, as lead times and stock levels are dynamic.

Selection Notes

Select the 8T49N240-035NLGI when low-jitter clock generation is required for high-speed serial links. Ensure the application supports the specific output voltage levels (2.5V or 3.3V) and package type. Verify that the required output frequencies fall within the device's operational range of 8 kHz to 1 GHz. Consider the I²C programming complexity if dynamic reconfiguration is needed during operation.

Part Context

This component is part of the Renesas 8T49N24x series of Universal Frequency Translators. It shares architectural similarities with the 8T49N241 and 8T49N242 models but differs in specific factory-programmed configurations and output capabilities. The 'NLGI' suffix typically denotes a specific package variant and temperature range compliant with RoHS standards.

Replacement Considerations

Direct replacements within the same family include the 8T49N241 and 8T49N242 series. However, these variants may have different factory-programmed frequency sets or output bank configurations. Verify pin compatibility and electrical parameters before substitution. Note that Renesas timing products are transitioning to SiTime; consult SiTime documentation for long-term sourcing strategies.