8T49N008A-048NLGI8

Overview

The 8T49N008A-048NLGI8 is a clock generator from the FemtoClock NG series, designed for high-speed timing applications. It features fourth-generation PLL technology and provides eight selectable LVPECL or LVDS outputs. The device supports a maximum frequency of 156.25MHz and accepts crystal inputs via CLK and nCLK pairs. It operates on supply voltages of 2.5V or 3.3V with an operating current of 122mA. The component is housed in a 40-VFQFN exposed pad package and is suitable for surface mount installation.

Feature Summary

• Utilizes fourth-generation FemtoClock NG PLL technology for precise timing generation
• Provides eight configurable output channels supporting both LVPECL and LVDS logic levels
• Accepts crystal input signals through dedicated CLK and nCLK differential input pairs

Applications

• High-speed data communication systems requiring precise clock distribution
• Telecommunications infrastructure equipment
• Server and storage subsystems needing low-jitter clock synthesis

Procurement Notes

Verify the specific suffix '8' indicates tape and reel packaging when ordering. Confirm that the required output voltage aligns with the supported 2.5V or 3.3V specifications. Ensure the design accommodates the 40-VFQFN exposed pad footprint for proper thermal management and electrical connection. Check for any recent product change notices regarding manufacturing updates.

Selection Notes

Select this component when eight differential outputs are required for system synchronization. Consider the 156.25MHz maximum frequency limit against system requirements. Evaluate the power consumption of 122mA against available board space and cooling capabilities. Compare against other FemtoClock NG variants if different output counts or input types are needed.

Part Context

This part belongs to Renesas' FemtoClock NG family, known for advanced jitter attenuation and flexible clock generation. It serves as a critical timing source in complex electronic designs where signal integrity is paramount. The device integrates multiple functions into a single compact package, reducing board space compared to discrete solutions.

Replacement Considerations

Check for direct substitutes within the 8T49N008A series that may offer updated packaging or minor parameter variations. Verify compatibility with existing firmware or configuration tools if the replacement has different internal registers. Ensure pinout compatibility to avoid redesigning the PCB layout.