8T49N008A-061NLGI

Overview

The 8T49N008A-061NLGI is a programmable clock generator from the FemtoClock NG family, manufactured by Renesas Electronics. It provides eight LVPECL or LVDS outputs and supports input frequencies up to 250 MHz. The device features a VCO range of 1.92 GHz to 2.5 GHz and delivers low RMS phase jitter, typically 225 fs at 156.25 MHz (12 kHz to 20 MHz). It operates on a single 2.5 V or 3.3 V supply and includes an I2C programming interface for configuration.

Feature Summary

• Generates up to eight selectable LVPECL or LVDS output clocks
• Supports internal crystal oscillator or external differential clock inputs
• Features fourth-generation FemtoClock NG PLL technology for low jitter performance
• Allows register programming via I2C interface

Applications

• PCI Express Gen2 and Gen3 compliant systems
• High-speed data communication equipment
• Network infrastructure line cards

Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status and package type against official datasheets. Check for product change notifications or end-of-life notices prior to procurement. Ensure voltage supply requirements match system design specifications.

Selection Notes

Select this component when multiple low-jitter differential outputs are required. Verify that the specific output voltage levels (LVPECL/LVDS) align with downstream receiver requirements. Consider I2C addressability if multiple devices share the same bus in the design architecture.

Part Context

This part belongs to the FemtoClock NG series, designed for high-performance timing applications. It replaces older generation clock synthesizers requiring complex discrete jitter filtering solutions. The integrated VCO and programmable dividers reduce board space and simplify design compared to multi-chip timing architectures.

Replacement Considerations

Consult official documentation for direct pin-compatible substitutes within the 8T49N008A series. Verify electrical parameter compatibility before substituting with other FemtoClock models.