8T49N203A-999NLGI8

Overview

The 8T49N203A-999NLGI8 is a Universal Frequency Translator from the FemtoClock NG series, manufactured by Renesas Electronics Corporation. It features a single PLL with a maximum frequency of 25MHz and supports differential inputs (HCSL, LVDS, LVHSTL, LVPECL, Crystal) to differential outputs (LVPECL). The device operates on a 2.375V to 3.465V supply within a -40°C to 85°C temperature range. Packaged in a 40-VFQFN with an exposed pad, it utilizes I2C programming. This specific part number is identified as obsolete and no longer in production.

Feature Summary

• Universal frequency translation with 3:2 input-to-output ratio
• Supports multiple differential input levels including LVDS, LVPECL, HCSL, and crystals
• I2C programmable configuration via internal registers or external EEPROM
• Low jitter performance suitable for high-speed digital applications

Applications

• SONET/SDH network line cards
• Ethernet switches and routers
• Wireless base station baseband units
• Test and measurement equipment

Procurement Notes

This component is officially discontinued and no longer manufactured. Availability is limited to existing stock from third-party distributors. Verification of authenticity and storage history is critical due to the end-of-life status. Buyers should confirm the specific revision level and ensure compatibility with replacement parts before procurement.

Selection Notes

Designers requiring this functionality should evaluate the 8T49N241 series as a primary alternative. Key parameters to match include the 25MHz maximum frequency, 40-VFQFN package, and LVPECL output requirements. Ensure that the replacement device supports the same I2C configuration interface and meets the required jitter specifications for the target application.

Part Context

The 8T49N203A belongs to the FemtoClock NG family of universal frequency translators. These devices are designed to generate precise clock signals from various input sources, providing jitter attenuation and frequency synthesis capabilities for telecommunications and data communication infrastructure.

Replacement Considerations

Publicly confirmed substitute part numbers include 8T49N241-994NLGI, 8T49N241-998NLGI, and 8T49N241-999NLGI. These alternatives offer similar frequency ranges and packaging but require verification of register compatibility and pinout alignment.