8T49N286-997NLGI

Overview

The 8T49N286-997NLGI is a FemtoClock NG clock synthesizer and jitter cleaner manufactured by Renesas Electronics. It belongs to the 8T49N286A series, designed for high-performance timing applications requiring low phase noise. The device integrates multiple output buffers capable of generating precise clock signals from crystal or external reference inputs. Key specifications include RMS phase jitter performance typical of the FemtoClock NG architecture, supporting various differential output standards such as LVPECL and LVDS. It operates within an industrial temperature range and utilizes an I2C interface for register programming and configuration management.

Feature Summary

• Fourth-generation FemtoClock NG PLL technology for ultra-low jitter performance
• Configurable outputs supporting LVPECL, LVDS, and HCSL standards
• I2C programmable interface for flexible frequency and mode configuration
• Industrial temperature range operation (-40°C to +85°C)

Applications

• High-speed serial link clock generation (PCIe, SATA, SAS)
• Networking equipment line cards and switches
• Test and measurement instrumentation timing
• Telecommunications baseband units

Procurement Notes

Verify the specific suffix '997' against official Renesas documentation to confirm factory pre-programmed frequency configurations. Ensure compatibility with required output voltage levels and package type before integration. Confirm current availability status through authorized distributors as lead times may vary.

Selection Notes

Select this component when low RMS phase jitter is critical for data integrity in high-speed interfaces. Compare jitter specs at relevant offset frequencies against system requirements. Verify that the available output drivers match the load capacitance and impedance of the receiving devices.

Part Context

This part is part of the 8T49N286 family, which offers universal frequency translation capabilities. It serves as a replacement for older jitter attenuators in modern high-speed digital systems requiring precise clock distribution and noise filtering.

Replacement Considerations

Check for direct pin-compatible upgrades within the 8T49N2xx series. Verify if newer revisions offer improved jitter performance or additional output options without requiring PCB redesign.