8T49N287-004NLGI8

Overview

The Renesas 8T49N287-004NLGI8 is a FemtoClock NG frequency translator IC featuring two independent fractional-feedback PLLs. It supports up to 1GHz output frequencies and provides eight outputs in a 56-VFQFN exposed pad package. The device operates on dual voltage supplies of 2.375V to 2.625V and 3.135V to 3.465V, with an operating temperature range of -40°C to 85°C.

Feature Summary

• Dual independent fractional-feedback PLL architecture for jitter attenuation and frequency translation
• Supports multiple differential input and output standards including LVDS, LVPECL, HCSL, and LVCMOS
• Configurable serial port interface for flexible programming and boot methods

Applications

• Telecommunications infrastructure equipment
• High-speed data networking systems
• Test and measurement instrumentation

Procurement Notes

Verify the specific suffix '004' against the official Renesas ordering guide to confirm the exact serial protocol and boot configuration. Ensure the required crystal specifications match the datasheet requirements for the selected variant. Confirm that the 56-VFQFN thermal pad soldering process aligns with your PCB assembly capabilities.

Selection Notes

Select this component when designing systems requiring precise frequency translation with low phase noise. The dual PLL structure allows for independent clock generation paths. Verify that the available input reference frequencies are compatible with the internal divider/multiplier options documented in the technical specifications.

Part Context

This part belongs to the FemtoClock NG family, designed for high-performance clock distribution. It integrates programmable logic to replace discrete clock solutions. The series is optimized for applications demanding strict timing accuracy and low jitter performance across varying environmental conditions.

Replacement Considerations

Consult the official cross-reference documentation for direct replacements. Note that variants within the 8T49N287 series may differ in pinout or supported protocols; verify electrical compatibility before substitution.