8T49N241-003NLGI

Overview

The 8T49N241-003NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It features one fractional-feedback PLL and four output dividers (one integer, three fractional) to generate up to four independent output frequencies ranging from 8kHz to 1.0GHz. The device supports LVPECL, LVDS, HCSL, or LVCMOS output levels and accepts multiple input clock types including LVPECL, LVDS, LVHSTL, HCSL, and LVCMOS. It provides jitter attenuation with 0.35ps RMS performance and includes phase-slope limiting for hitless switching.

Feature Summary

• Generates up to four independent output frequencies from 8kHz to 1.0GHz using one integer and three fractional output dividers
• Supports LVPECL, LVDS, HCSL, and LVCMOS output voltage levels
• Accepts dual inputs of LVPECL, LVDS, LVHSTL, HCSL, or LVCMOS with auto/manual selection and hitless switching
• Provides 0.35ps RMS jitter attenuation (including spurs) from 12kHz to 20MHz

Applications

• 10G/40G/100G SONET/SDH and Ethernet network line cards
• Wireless base station baseband units
• Carrier Ethernet switches and OTN equipment
• GbE/10GbE/100GbE Synchronous Ethernet applications

Part Context

This component belongs to the FemtoClock NG family of timing devices. The product portfolio has been acquired by SiTime, with full transition expected by the end of 2026. Configuration files and datasheets remain available via Renesas until that date, while new design support and procurement are directed to SiTime.

Replacement Considerations

Publicly confirmed substitute part numbers include 8T49N241-994NLGI, 8T49N241-998NLGI, 8T49N241-999NLGI, 8T49N242-998NLGI8, and 8T49N242-999NLGI.