8T49N008A-000NLGI8

Overview

The 8T49N008A-000NLGI8 is a programmable clock generator from Renesas Electronics, part of the FemtoClock NG family. It features an integrated voltage-controlled oscillator (VCO) operating between 1.92 GHz and 2.5 GHz. The device provides eight selectable output channels configurable as LVPECL or LVDS. It supports differential input levels including LVPECL, LVDS, and HCSL. The component utilizes an I²C interface for register programming and operates within an ambient temperature range of -40 °C to +85 °C. It is supplied in a lead-free RoHS-compliant package.

Feature Summary

• Fourth-generation FemtoClock NG PLL technology with integrated VCO (1.92GHz–2.5GHz)
• Eight selectable outputs per bank, configurable as LVPECL or LVDS
• Supports differential inputs: LVPECL, LVDS, and HCSL
• I²C serial interface for flexible register programming

Applications

• PCI Express Gen2 (5Gb/s) jitter compliant systems
• PCI Express Gen3 (8Gb/s) jitter compliant systems
• Networking and communications equipment requiring low phase jitter

Procurement Notes

Verify current availability status as this specific order code may be subject to discontinuation notices. Confirm package type and marking details against the latest datasheet revision prior to procurement. Ensure I²C address and register settings match the required frequency configuration.

Selection Notes

Select this component when eight synchronized outputs are required from a single reference source. Verify that the input signal matches supported differential levels (LVPECL, LVDS, HCSL). Check if the internal VCO range covers the desired output frequencies via the available dividers. Compare RMS phase jitter specifications against system requirements at relevant offset frequencies.

Part Context

This part belongs to the 8T49N008 series of programmable clock generators. It shares the core FemtoClock NG architecture with other variants in the family but is distinguished by its specific output count and factory pre-programmed configurations accessible via power-up pins.

Replacement Considerations

Direct substitutes include other 8T49N008 variants with different order codes for distinct frequency sets. Cross-family replacements like the 8T49N028 offer similar functionality but may differ in pinout or specific jitter performance metrics.