8T49N281C-031NLGI8

Overview

The 8T49N281C-031NLGI8 is a clock generator and support product manufactured by Renesas Electronics Corporation. It belongs to the FemtoClock series and functions as a clock translator. The device features eight outputs with a maximum output frequency of 1 GHz and a maximum input frequency of 40 MHz. It is housed in a VFQFN-56 package. The component supports LVCMOS, LVDS, and LVPECL output types. Operating temperatures range from -40°C to +85°C.

Feature Summary

• Provides eight selectable output channels for clock distribution
• Supports multiple differential and single-ended output voltage standards including LVDS, LVPECL, and LVCMOS
• Integrates fourth-generation FemtoClock PLL technology for low jitter performance
• Accepts crystal or external reference clock inputs

Applications

• High-speed data communication systems requiring precise clock translation
• Network equipment utilizing Gigabit Ethernet interfaces
• Telecommunications infrastructure components
• Test and measurement instrumentation

Procurement Notes

Verify the specific ordering suffix and revision level against the official Renesas datasheet before procurement. Confirm that the required output frequencies and input reference specifications match the factory-programmed parameters associated with this part number. Ensure compliance with RoHS 6 lead-free packaging requirements and check for any active Product Change Notifications (PCNs) regarding assembly sites or material changes.

Selection Notes

Select this component when an application requires translating a lower frequency input signal into high-frequency differential or single-ended clocks. The VFQFN-56 package is suitable for space-constrained designs. Verify that the target system can accommodate the specified operating temperature range and power supply voltages. Consider the I2C programmability if dynamic configuration is needed, although this specific order code implies fixed pre-programming.

Part Context

This device is part of the FemtoClock family of ultra-low jitter clocks. It serves as a specialized timing solution designed to replace discrete oscillator and buffer combinations. The integration of the PLL and fanout buffers reduces board space and improves signal integrity compared to traditional multi-component clock generation architectures.

Replacement Considerations

Consult the official Renesas FemtoClock NG selection guide for direct pin-compatible substitutes. Cross-reference alternative models within the 8T49N281C series or the broader 8T49N00x/8T49N24x families based on output count and jitter specifications.

FAQ

What are the supported output voltage levels?

The device supports LVCMOS, LVDS, and LVPECL output types.

What is the maximum output frequency capability?

The maximum output frequency is 1 GHz.

How many output channels does this model provide?

It provides eight output channels.