8T49N241-999NLGI

Overview

The Renesas 8T49N241-999NLGI is a FemtoClock NG Universal Frequency Translator IC. It features one fractional-feedback PLL and three fractional output dividers, enabling the generation of up to four independent output frequencies ranging from 8kHz to 1.0GHz (LVPECL/LVDS/HCSL) or 250MHz (LVCMOS). The device supports jitter attenuation with 0.35ps RMS phase noise (12kHz–20MHz) and accepts multiple input clock types including LVPECL, LVDS, and LVCMOS. Configuration is managed via I²C or external EEPROM. This specific suffix indicates a 'power-up disabled' state upon initialization.

Feature Summary

• Generates up to four independent output clocks using one PLL and three fractional dividers
• Supports output frequencies up to 1.0GHz with 0.35ps RMS jitter performance
• Accepts multiple input formats: LVPECL, LVDS, LVHSTL, HCSL, and LVCMOS
• Configurable via I²C interface or external EEPROM boot

Applications

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

Procurement Notes

Verify component status as this model may be discontinued. Confirm that the '999' suffix correctly provides the required power-up disabled behavior for your system design. Ensure compatibility with the FemtoClock NG family specifications before procurement.

Selection Notes

Select this part when four independent high-frequency outputs are required from a single PLL source. Compare against the 8T49N241-998NLGI if an EEPROM boot configuration is preferred over internal OTP storage. Verify that the 1.0GHz differential output limit meets the target application frequency requirements.

Part Context

This component belongs to the Renesas FemtoClock NG Universal Frequency Translator family. These devices are designed for high-performance timing applications requiring low jitter and flexible frequency synthesis capabilities across various communication standards.

Replacement Considerations

Potential substitutes within the same family include the 8T49N241-998NLGI8 and 8T49N242-998NLGI8. Verify pinout and register compatibility before substitution.