8T49N241-008NLGI

Overview

The Renesas 8T49N241-008NLGI is a FemtoClock NG Universal Frequency Translator featuring one fractional-feedback PLL, one integer divider, and three fractional output dividers. It generates up to four independent LVPECL, LVDS, HCSL, or LVCMOS outputs ranging from 8kHz to 1.0GHz (differential) or 250MHz (LVCMOS). The device supports input clocks from 8kHz to 875MHz with hitless switching and phase-slope limiting. It achieves an RMS jitter of 0.35ps (including spurs) from 12kHz to 20MHz. Configuration is managed via I²C or external EEPROM.

Feature Summary

• Generates up to four independent output frequencies using one PLL and four dividers
• Supports LVPECL, LVDS, HCSL, and LVCMOS output levels
• Achieves 0.35ps RMS jitter (12kHz to 20MHz)
• Features auto/manual input clock selection with hitless switching

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

Procurement Notes

Verify the specific suffix '008' against official documentation to confirm boot behavior and configuration source. Confirm package type and temperature range details directly with the manufacturer or authorized distributors prior to ordering.

Selection Notes

Select this component for designs requiring multiple independent clock frequencies derived from a single reference. Ensure the required output voltage levels (LVPECL, LVDS, etc.) match the target system interfaces. Verify that the 0.35ps jitter specification meets the requirements of the downstream high-speed serial links.

Part Context

This part belongs to the FemtoClock NG family of universal frequency translators. It is designed to replace fixed-frequency oscillators in complex networking systems, allowing for flexible clock generation and jitter attenuation within a single integrated circuit.

Replacement Considerations

Consult official substitution lists for updated part numbers following the transition of Renesas timing products to SiTime.