8T49N287-004NLGI

Overview

The 8T49N287-004NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It functions as a clock synthesizer and jitter cleaner designed for high-performance networking applications. The device supports Stratum timing standards and integrates advanced PLL technology to generate precise clock signals from various input references. Key specifications include support for multiple output formats such as LVPECL, LVDS, and HCSL, with output frequencies reaching up to 1 GHz. The component operates within an ambient temperature range of -40°C to +85°C and utilizes an I²C interface for register programming and configuration management.

Feature Summary

• FemtoClock NG PLL technology for low phase noise performance
• Supports GR.1244-CORE Stratum timing compliance
• Configurable outputs: LVPECL, LVDS, HCSL, or LVCMOS
• I²C programmable interface for flexible frequency synthesis

Applications

• SONET/SDH network line cards
• Carrier Ethernet switches
• OTN (Optical Transport Network) equipment
• Test and measurement instruments

Procurement Notes

Verify the specific suffix '004' against official Renesas documentation to confirm the exact factory pre-programmed frequency configuration. Datasheets may list variants like '002' or '998'; ensure the selected part number matches the required input/output frequency set for the target design.

Selection Notes

Select this component when Stratum-compliant timing is required for SONET/SDH or Ethernet applications. Ensure the design accommodates the necessary supply voltages and that the I²C bus constraints meet the system's addressing requirements. Verify thermal dissipation capabilities for the operating environment.

Part Context

This part belongs to the 8T49N287 family of Universal Frequency Translators. It shares architectural similarities with other FemtoClock NG devices but is distinguished by its specific Stratum compliance and output drive capabilities tailored for telecom infrastructure.

Replacement Considerations

Direct substitutes are limited due to unique factory programming. Check Renesas documentation for pin-compatible alternatives within the 8T49N series, such as the 8T49N242 or 8T49N281, if functional reprogramming is feasible.