8T49N008A-051NLGI8

Overview

The 8T49N008A-051NLGI8 is a programmable clock generator from the FemtoClock NG series by Renesas Electronics. It features four selectable LVPECL or LVDS outputs and accepts differential input levels including LVPECL, LVDS, and HCSL. The device utilizes fourth-generation FemtoClock NG PLL technology with a VCO range of 1.9 GHz to 2.55 GHz. It operates on a full 2.5V or 3.3V power supply and includes an I²C programming interface for register configuration. The component is housed in a lead-free package and supports an ambient operating temperature range of -40°C to 85°C.

Feature Summary

• Fourth-generation FemtoClock NG PLL technology for low phase noise performance
• Four output channels configurable as LVPECL or LVDS via I²C interface
• Supports multiple differential input levels including LVPECL, LVDS, and HCSL
• Integrated alarm and monitoring functions for clock signal integrity

Applications

• Networking equipment requiring precise clock distribution
• Telecommunications infrastructure systems
• High-speed data transmission interfaces
• Server and storage system clock generation

Procurement Notes

Verify the specific order code suffix against the official Renesas ordering guide to ensure correct factory pre-programmed frequency configurations. Confirm package type and RoHS compliance status prior to procurement. Check for product change notifications regarding assembly sites or labeling updates. Ensure compatibility with existing I²C control logic and voltage supply rails.

Selection Notes

Select this component when low RMS phase jitter and flexible output formatting are required for single-input multi-output clock distribution. Verify that the required output frequencies align with the internal crystal oscillator or external reference capabilities defined in the datasheet tables. Consider the I²C interface requirements for dynamic frequency selection if applicable to the system design.

Part Context

This part belongs to the FemtoClock NG family, designed for ultra-low jitter applications. It integrates a frequency synthesizer and jitter attenuator suitable for demanding networking and communication environments. The device replaces older generations by offering improved phase noise performance and greater flexibility through programmable output banks and comprehensive monitoring features.

Replacement Considerations

Consult the official Renesas replacement matrix for verified substitute part numbers. Cross-reference pinouts and electrical specifications to ensure compatibility. Verify that alternative devices support the same output formats and input level requirements.