8T49N488AASGI

Overview

The 8T49N488AASGI is a quad PLL FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It integrates low-phase noise frequency translation, jitter attenuation, and monitoring functions within a 10mm x 10mm CABGA-80 package. The device supports four fully independent PLLs capable of generating output frequencies from 0.98MHz to 1300MHz. It accepts input clock frequencies ranging from 8kHz to 710MHz via LVPECL, LVDS, LVHSTL, or HCSL interfaces. Key electrical parameters include a typical RMS phase jitter of 465fs in Low Bandwidth mode and 333fs in Synthesizer mode. Operating voltage is 2.5V ± 5%, with an ambient temperature range of -40°C to +85°C.

Feature Summary

• Quad PLL architecture with independent frequency synthesis capabilities
• FemtoClock NG technology for ultra-low phase noise performance
• I²C serial interface for register programming and configuration
• Smoothed reference switching and clock input alarm functions

Applications

• Networking and communication equipment
• Synchronous Ethernet line cards
• SONET/SDH network infrastructure
• Test and measurement instruments

Part Context

This component belongs to the 8T49N488I family of Universal Frequency Translators. It is part of the broader FemtoClock NG portfolio, which includes dual-PLL (8T49N244I), tri-PLL (8T49N366I), and other quad PLL variants. The suffix 'ASGI' denotes specific packaging and environmental compliance attributes within the Renesas ordering system.

Replacement Considerations

Direct replacements within the same family include the 8T49N445I. Designers should verify pin compatibility and register settings when substituting between different PLL counts or output configurations.