8T49N285-002NLGI8

Overview

The Renesas 8T49N285-002NLGI8 is a clock synthesizer and jitter cleaner belonging to the FemtoClock NG family. It functions as a Universal Frequency Translator (UFT) compliant with GR.1244-CORE Stratum standards for ultra-fine timing applications. The device integrates a Phase-Locked Loop (PLL) to clean input clock signals and generate precise output frequencies. It supports multiple differential input and output interface types, including LVPECL, LVDS, and HCSL, allowing flexible integration into high-speed digital systems requiring low-jitter clock distribution.

Feature Summary

• Compliant with Telcordia GR.1244-CORE Stratum standards for network synchronization
• Integrates a low-noise PLL for effective jitter attenuation and clock regeneration
• Supports multiple differential I/O standards including LVPECL, LVDS, and HCSL
• Configurable via serial interface for flexible frequency translation and output routing

Applications

• Telecommunications base stations requiring Stratum-level timing
• High-speed data transmission equipment needing low-jitter clock sources
• Network synchronization infrastructure adhering to GR.1244 specifications
• Test and measurement instruments requiring precise frequency synthesis

Procurement Notes

Verify the exact suffix against the manufacturer's current ordering guide, as suffixes define package type, temperature range, and specific configuration options. Confirm availability status directly with authorized distributors, as lead times may vary based on production schedules. Ensure compliance with RoHS3 directives if required by the target application environment.

Selection Notes

Select this component when GR.1244 Stratum compliance is mandatory for the system design. Evaluate the required input/output voltage levels and signal types (LVPECL vs LVDS) to ensure compatibility with existing circuitry. Consider the maximum operating frequency and jitter performance requirements relative to the available reference clock inputs before finalizing the part number.

Part Context

This model is part of the Renesas FemtoClock NG series, designed for high-performance timing applications. The 8T49N285 variant specifically targets universal frequency translation needs in telecommunications and networking sectors. It succeeds earlier generations by offering enhanced configurability and stricter adherence to international timing standards like GR.1244.

Replacement Considerations

Direct replacements within the same FemtoClock NG family should be checked for pin-to-pin compatibility and identical electrical characteristics. Verify that any substitute part maintains the same GR.1244 Stratum rating and supports the necessary input/output interface combinations required by the original design.