8T49N004A-058NLGI8

Overview

The 8T49N004A-058NLGI8 is a clock generator from the FemtoClock NG series manufactured by Renesas Electronics Corporation. It features a single circuit with a 1:4 input-to-output ratio and supports differential inputs and outputs. The maximum output frequency reaches 300MHz, operating on a supply voltage of 2.375V to 3.465V. The device utilizes LVPECL for outputs and accepts HCSL, LVDS, or LVPECL inputs. It is housed in a 32-VFQFN package with an exposed pad and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Supports differential input formats including HCSL, LVDS, and LVPECL
• Generates four LVPECL output signals from a single reference
• Maximum output frequency capability of 300MHz
• Operates within a supply voltage range of 2.375V to 3.465V

Applications

• High-speed serial communication interfaces requiring low jitter clocks
• Data center infrastructure equipment
• Telecommunications base stations
• Enterprise storage systems

Procurement Notes

This component is officially listed as discontinued by the manufacturer. Verification of end-of-life status is recommended before finalizing design-in decisions. Availability is restricted to existing stock or secondary market sources. Engineering change notices regarding assembly site changes have been issued. Compliance with RoHS3 standards is confirmed for units produced prior to discontinuation.

Selection Notes

Designers should verify that the required output frequency does not exceed 300MHz. The device requires a 32-VFQFN footprint with specific thermal pad considerations. Input signal compatibility must match HCSL, LVDS, or LVPECL levels. Due to the discontinued status, alternative components from the same FemtoClock family may require schematic and layout modifications.

Part Context

The 8T49N004A-058NLGI8 belongs to the FemtoClock NG family, which utilizes fourth-generation PLL technology for jitter attenuation. This specific part number represents a factory-programmed configuration variant. The '058' suffix indicates the specific frequency synthesis settings provided by Renesas. It serves as a fixed-frequency solution compared to fully programmable counterparts in the broader IDT/Renesas portfolio.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Renesas application notes for cross-referencing compatible devices within the 8T49N004 or 8T49N2xx series families.