8T49N2083-01NLGI

Overview

The 8T49N2083-01NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics Corporation. It features one fractional-feedback PLL capable of functioning as a frequency translator with jitter attenuation or a frequency synthesizer. The device supports up to four integer output dividers, enabling the generation of distinct output frequencies ranging from 8kHz to 1.0GHz for differential outputs and up to 250MHz for LVCMOS outputs. It accepts multiple input clock types including LVPECL, LVDS, LVHSTL, HCSL, and LVCMOS, with frequencies up to 875MHz. Configuration is managed via an I2C interface or external EEPROM.

Feature Summary

• Generates up to four independent output frequencies using integer output dividers derived from a single fractional-feedback PLL.
• Supports flexible input configurations including hitless switching between auto and manual input clock selection.
• Offers phase-slope limiting and fully hitless switching options to control output phase transients during clock changes.
• Configurable through an I2C programming interface or boot configuration from an external I2C EEPROM.

Applications

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

Procurement Notes

Verify component status as the 8T49N series may be subject to transition policies. Confirm specific order codes match required frequency sets. Ensure compatibility with Timing Commander software for configuration. Check for RoHS compliance documentation. Validate package type and moisture sensitivity levels against design requirements.

Selection Notes

Select this model when precise jitter attenuation is required for high-speed serial links. Consider the need for multiple independent output frequencies from a single reference. Evaluate the necessity for hitless switching capabilities in redundant systems. Verify support for required output voltage standards such as LVPECL or LVDS.

Part Context

This component belongs to the FemtoClock NG family of universal frequency translators. It is designed to meet stringent jitter limits for high-speed data transmission applications. The device integrates advanced PLL technology to provide low-phase-jitter clock signals suitable for demanding telecommunications and networking environments.

Replacement Considerations

Consult official substitution lists for equivalent timing solutions. Verify functional compatibility regarding output count and jitter performance. Ensure pinout and package dimensions match existing board layouts. Confirm software toolchain support for new part numbers.