8T49N287-999NLGI#

Overview

The 8T49N287-999NLGI is a Universal Frequency Translator (UFT) from the FemtoClock NG series by Renesas Electronics. It functions as a clock generator and jitter attenuator designed for high-performance networking applications. The device supports multiple input and output formats, including LVPECL, LVDS, HCSL, and LVCMOS. It features an I2C programmable interface for configuration and register settings. The component operates within a temperature range of -40°C to +85°C and complies with RoHS standards. This specific part number indicates a factory pre-programmed frequency translation profile.

Feature Summary

• Universal Frequency Translator architecture supporting jitter attenuation and frequency synthesis
• Supports differential inputs and outputs in LVPECL, LVDS, HCSL, and LVCMOS formats
• I2C programmable interface for custom frequency configurations
• Compliant with Telcordia GR-1244-CORE and ITU-T G.8262 timing requirements

Applications

• SONET/SDH network line cards
• Synchronous Ethernet (SyncE) equipment
• Carrier Ethernet switches
• OTN (Optical Transport Network) systems

Procurement Notes

The 8T49N287-999NLGI is listed as End-of-Life (EOL) by Renesas Electronics. Distributors such as Mouser indicate that the product is not currently available for sale in many regions. Buyers should verify the specific EOL notification date and check for valid replacement parts from the same family before procurement planning.

Selection Notes

Select this component when a fixed-frequency translation profile is required without external EEPROM programming. The '999' suffix typically denotes a specific factory-programmed configuration. Ensure the required input/output voltage levels and frequency ranges match the system design. Verify compatibility with existing timing sources and jitter budget requirements for SONET/SDH or SyncE applications.

Part Context

This part belongs to the 8T49N287 series of FemtoClock NG Universal Frequency Translators. It is distinct from other variants like the 8T49N287-998NLGI, which may have different packaging or boot configurations. The series is designed to replace traditional PLL-based clock generators in telecom infrastructure.

Replacement Considerations

Due to the EOL status, consider the 8T49N287A series or newer FemtoClock NG devices. Check Renesas documentation for specific pin-to-pin compatible replacements. Verify if the new part requires reprogramming via I2C or if it supports the same factory preset frequencies.