8T49N283C-998NLGI8

Overview

The 8T49N283C-998NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It features a single fractional-feedback PLL capable of generating up to eight LVPECL or LVDS differential outputs with frequencies ranging from 8 kHz to 1 GHz. The device accepts crystal or external clock inputs and provides low jitter performance, typically 0.35 ps RMS (including spurs) in the 12 kHz to 20 MHz bandwidth. Powered by a 2.375 V to 3.465 V supply, it operates within a -40°C to 85°C temperature range and is housed in a 56-VFQFN exposed pad package.

Feature Summary

• Generates up to 8 LVPECL/LVDS differential outputs ranging from 8 kHz to 1 GHz
• Single fractional-feedback PLL with 0.35 ps RMS jitter (12 kHz to 20 MHz)
• Supports I²C programming and boot from external EEPROM
• Operates on 2.375 V to 3.465 V supply voltage

Applications

• 10G/40G/100G SONET/SDH and Ethernet network line cards
• Wireless base station baseband units
• Carrier Ethernet switches and OTN equipment
• Test and measurement applications

Procurement Notes

Verify the specific suffix '998' against the official datasheet to confirm factory pre-programmed frequency configurations and boot behavior. Confirm moisture sensitivity level and reflow soldering profile requirements for the 56-VFQFN package during assembly planning.

Selection Notes

Select this component when eight independent differential clock outputs are required from a single PLL source. Ensure the application supports LVPECL or LVDS output levels and requires jitter attenuation capabilities below 0.35 ps RMS. Verify that the input reference frequency falls within the supported range for the desired output configuration.

Part Context

This part belongs to the FemtoClock NG family of universal frequency translators. It shares architectural similarities with models like the 8T49N241 but offers a higher output count of eight channels. The device is designed for high-performance timing synchronization in telecommunications and datacom infrastructure.

Replacement Considerations

The 8T49N241 series may serve as a functional alternative if fewer than eight outputs are sufficient. Verify register compatibility and output drive strength differences before substitution.