8T49N281C-994NLGI8

Overview

The 8T49N281C-994NLGI8 is a clock translator within the FemtoClock family, manufactured by Renesas Electronics. It features eight output channels capable of generating frequencies up to 1 GHz from a maximum input frequency of 40 MHz. The device supports LVCMOS, LVDS, and LVPECL output types with typical RMS phase jitter specifications ranging from 300 fs to 313 fs. It operates on dual power supplies of 2.5 V (2.375 V to 2.625 V) and 3.3 V (3.135 V to 3.465 V), consuming approximately 66 mA to 67 mA. Packaged in a VFQFN-56 format, it functions within an ambient temperature range of -40 °C to +85 °C.

Feature Summary

• Eight selectable output channels supporting LVCMOS, LVDS, and LVPECL levels
• Maximum output frequency of 1 GHz with input frequency up to 40 MHz
• Low RMS phase jitter performance between 300 fs and 313 fs
• Dual voltage operation at 2.5 V and 3.3 V with low current consumption

Applications

• High-speed networking equipment requiring precise clock translation
• Telecommunications infrastructure utilizing SONET/SDH standards
• Test and measurement instruments demanding low jitter signals

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific PCNs regarding assembly site changes or material modifications. Ensure storage conditions adhere to moisture sensitivity level requirements prior to soldering.

Selection Notes

Select this model when eight independent outputs are required with mixed voltage level compatibility. Verify that the 40 MHz maximum input frequency aligns with system reference clocks. Consider thermal management for the VFQFN-56 package given the operating current and ambient temperature limits.

Part Context

This component belongs to the 8T49N281C series of clock translators. It shares the FemtoClock technology platform with other Renesas timing devices but is distinguished by its specific eight-output configuration and 40 MHz input constraint, differentiating it from higher-frequency input variants in the broader product line.

Replacement Considerations

Direct functional substitutes within the same family include the 8T49N281C-004NLGI8. Cross-model replacements such as the 8T49N242 or 8T49N240 series may offer similar jitter performance but differ significantly in output count and PLL architecture.