8T49N203A-999NLGI

Overview

The 8T49N203A-999NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It features one fractional-feedback PLL capable of functioning as a frequency translator with jitter attenuation or a frequency synthesizer. The device includes four integer output dividers to generate up to four independent output frequencies ranging from 8kHz to 1.0GHz. Outputs support LVPECL, LVDS, HCSL, or LVCMOS levels. It accepts up to two input clocks and supports I2C programming or external EEPROM boot.

Feature Summary

• Generates up to four different output frequencies from two clock inputs and a crystal input using a single fractional-feedback PLL.
• Supports hitless switching between input clocks with phase-slope limiting options to control output phase transients.
• Configurable via I2C interface or by loading configuration from an external I2C EEPROM at power-up.
• Compliant with Telcordia GR-253-CORE and ITU-T G.813/G.8262 standards when paired with a Synchronous Equipment Timing Source.

Applications

• 10G/40G/100G SONET/SDH and Ethernet network line cards
• Wireless base station baseband units
• GbE/10GbE/100GbE Synchronous Ethernet line card applications

Procurement Notes

Verify the specific suffix '999' against official documentation to confirm the power-up state behavior, as suffixes define operational modes rather than changing core functionality. Confirm package type and moisture sensitivity level requirements for your assembly process. Check current product status, as this component may be subject to discontinuation notices.

Selection Notes

Select this component when designing systems requiring precise frequency translation with low jitter performance across multiple output domains. Ensure compatibility with required output voltage levels (LVPECL, LVDS, HCSL, or LVCMOS). Verify that the input clock sources match the supported differential signaling types and frequency ranges specified in the datasheet.

Part Context

This part belongs to the FemtoClock NG family of universal frequency translators. These devices are designed for high-performance timing applications requiring flexible frequency synthesis and jitter attenuation capabilities. The family supports various output configurations to meet diverse networking and telecommunications standards.

Replacement Considerations

Official similar replacements include 8T49N241 and 8T49N242 series parts. Verify functional equivalence regarding output count, frequency range, and interface compatibility before substitution.