8T49N203A-028NLGI8

Overview

The Renesas Electronics Corporation 8T49N203A-028NLGI8 is a FemtoClock NG Universal Frequency Translator and Synthesizer. It generates output frequencies from 0.98MHz to 1,300MHz using two differential inputs (LVPECL, LVDS, LVHSTL, HCSL) or a crystal input (16MHz–40MHz). The device features two individually programmable LVPECL or LVDS outputs with supply voltages of 2.5V or 3.3V. It supports three operating modes: Frequency Synthesizer, High-Bandwidth Frequency Translator, and Low-Bandwidth Frequency Translator. Key electrical parameters include an input frequency range of 8kHz–710MHz and an RMS phase jitter of 439fs (typical) at 155.52MHz in Low Bandwidth Mode.

Feature Summary

• Fourth-generation FemtoClock NG technology for low phase noise performance
• Two factory-programmed default configurations stored in One-Time Programmable memory
• I2C serial interface for register programming and post-power-up configuration overwriting
• Integrated alarm monitoring functions including LOCK_IND, HOLDOVER, and clock bad status indicators

Applications

• Networking and communications equipment requiring jitter attenuation
• PCI Express computing applications utilizing high-bandwidth translation
• General purpose clock synthesis from fundamental mode crystals
• Line cards supporting multiple I/O module options via configurable defaults

Procurement Notes

Verify the specific ordering suffix '028' against official documentation to confirm the programmed factory configurations. Confirm package availability as this component utilizes a 40-lead VFQFN package. Check current manufacturing status as related devices in this family have been subject to discontinuance notifications.

Selection Notes

Select this device when dual independent output clocks are required from a single input reference or crystal source. Ensure the application requires either the low-bandwidth jitter attenuation capability or the high-bandwidth tracking mode. Verify that the desired output voltage levels (2.5V or 3.3V) match the system requirements for both core and output supplies.

Part Context

This component belongs to the IDT8T49N203I FemtoClock NG Universal Frequency Translator family. It is designed as a highly flexible synthesizer suitable for replacing discrete clock generation solutions in networking and computing hardware. The device integrates PLL loops, VCO, and digital dividers into a single chip.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult manufacturer resources for cross-reference data regarding discontinued variants within the 8T49N203 series.