8T49N240-033NLGI#

Overview

The 8T49N240-033NLGI is a clock synthesizer and jitter attenuator manufactured by Renesas Electronics. It belongs to the FemtoClock family, designed for high-performance timing applications requiring low phase noise. The device supports multiple output frequencies derived from crystal or external reference inputs. It features an I2C programming interface for configuration flexibility. The component operates within standard industrial temperature ranges and utilizes RoHS-compliant packaging. Specific electrical parameters such as supply voltage and output drive levels are defined in the official datasheet.

Feature Summary

• Integrated jitter attenuation and frequency synthesis capabilities
• Supports multiple output configurations via I2C programmable registers
• Compatible with LVPECL and LVDS output standards
• Low RMS phase jitter performance suitable for high-speed serial links

Applications

• High-speed data communication interfaces
• Network equipment synchronization
• Server and storage system clocking
• Test and measurement instrumentation

Procurement Notes

Verify availability status through authorized distributors as supply may be limited. Confirm the complete part number including suffixes for package and tape/reel specifications. Ensure compatibility with existing design constraints regarding power supply and pinout before procurement. Check for any product change notices affecting assembly sites or materials.

Selection Notes

Select this component when low jitter performance is critical for signal integrity in high-frequency applications. Compare output frequency requirements against the device's internal VCO range and divider capabilities. Verify that the required output voltage levels (LVPECL/LVDS) match the load specifications. Consider the I2C address configuration if multiple devices share the same bus.

Part Context

This part is part of the 8T49N240 series, which includes various custom order codes for specific frequency combinations. The 'NLGI' suffix typically denotes a specific package type and tape/reel quantity. Renesas timing products have been acquired by SiTime, with transition plans ongoing until the end of 2026. Existing documentation remains available on Renesas.com during the transition period.

Replacement Considerations

Consult the official replacement list for direct substitutes. The 8T49N241 and 8T49N242 series offer similar functionality with potential differences in output count or jitter performance. Verify pin-to-pin compatibility and register mapping before substitution. Contact technical support for validation of alternative parts in existing designs.