8T49N203ANLGI

Overview

The IDT8T49N203I is a FemtoClock NG Universal Frequency Translator and Synthesizer featuring two differential outputs. It supports input frequencies from 8kHz to 710MHz and generates output frequencies between 0.98MHz and 1,300MHz. The device operates in three modes: Frequency Synthesizer, High-Bandwidth Frequency Translator, and Low-Bandwidth Frequency Translator. It accepts LVPECL, LVDS, LVHSTL, or HCSL inputs and provides programmable LVPECL or LVDS outputs at 2.5V or 3.3V levels. Powered by 2.5V or 3.3V supplies, it functions within an ambient temperature range of -40°C to 85°C.

Feature Summary

• Supports Frequency Synthesizer, High-Bandwidth, and Low-Bandwidth Frequency Translator modes
• Two individually programmable differential outputs (LVPECL or LVDS) with 2.5V/3.3V level selection
• Dual differential inputs supporting LVPECL, LVDS, LVHSTL, and HCSL standards
• Includes two factory-programmable default configurations stored in OTP memory

Applications

• Networking and communications equipment requiring jitter attenuation
• PCI Express and computing systems utilizing high-bandwidth frequency translation
• Line cards supporting multiple I/O modules with distinct clock requirements

Procurement Notes

Verify the specific ordering suffix for voltage and package variations. Confirm that the component meets RoHS 6 compliance requirements. Check for availability as this series may have discontinuation notices. Ensure the selected variant matches the required supply voltage configuration.

Selection Notes

Select based on the required operating mode, specifically whether jitter attenuation or spread-spectrum tracking is needed. Choose the appropriate output voltage level (2.5V or 3.3V) to match downstream logic. Verify that the input signal type (LVPECL, LVDS, etc.) is supported by the chosen pin configuration.

Part Context

This component belongs to the FemtoClock NG family of universal frequency translators. It was originally manufactured by Integrated Device Technology (IDT), which has since been acquired by Renesas Electronics Corporation. The device serves as a flexible clock solution for generating precise frequencies from various reference sources.

Replacement Considerations

Consult manufacturer documentation for direct replacements. Note that newer iterations like the 8T49N240 offer similar fractional-feedback capabilities but may differ in pinout or feature sets.