8T49N287-001NLGI

Overview

The 8T49N287-001NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It functions as a clock generator and jitter attenuator designed for high-performance networking applications. The device utilizes fourth-generation FemtoClock NG PLL technology to generate precise clock signals from crystal or external reference inputs. It supports multiple output configurations compliant with PCI Express standards, including Gen2 (5Gb/s) and Gen3 (8Gb/s). The component operates within an ambient temperature range of -40 °C to 85 °C and features an I²C programming interface for register configuration.

Feature Summary

• Fourth-generation FemtoClock NG PLL technology
• PCI Express Gen2 (5Gb/s) and Gen3 (8Gb/s) jitter compliance
• I²C serial interface for programmable register settings
• RMS phase jitter: 225fs typical at 156.25MHz (12kHz to 20MHz)

Applications

• PCI Express Gen2 and Gen3 systems
• Networking equipment requiring low-jitter clock synthesis
• Telecommunications infrastructure

Procurement Notes

The 8T49N287-001NLGI is listed as End-of-Life (EOL) by the manufacturer. Verification of current availability requires checking authorized distributors for remaining stock or obsolete inventory. Designers should consult the official datasheet for lifecycle status and recommended replacement strategies prior to procurement.

Selection Notes

Select this component for applications requiring strict adherence to PCI Express Gen2/Gen3 jitter specifications. Ensure the design supports the required I²C interface for configuration. Verify that the operating temperature range of -40 °C to 85 °C meets the environmental requirements of the target system.

Part Context

This part belongs to the 8T49N287 series of FemtoClock NG Universal Frequency Translators. The series includes variants such as the 8T49N287A-998NLGI. These devices are engineered to provide flexible clock generation and jitter attenuation for high-speed digital interfaces.

Replacement Considerations

Due to the EOL status, verify compatible substitutes within the same FemtoClock NG family or newer generations. Consult Renesas documentation for pin-compatible or functionally equivalent alternatives suitable for existing designs.