8T49N222B-108NLGI8

Overview

The 8T49N222B-108NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It features one fractional-feedback PLL capable of jitter attenuation or frequency synthesis, paired with two integer output dividers to generate up to two independent output frequencies ranging from 8kHz to 1GHz. The device supports differential inputs including LVPECL, LVDS, LVHSTL, and HCSL, with LVDS outputs. It operates on a 2.375V to 3.465V supply within a -40°C to 85°C temperature range and is housed in a 48-VFQFN exposed pad package.

Feature Summary

• Single fractional-feedback PLL with two integer output dividers for independent frequency generation
• Supports input levels: LVPECL, LVDS, LVHSTL, HCSL; Output: LVDS
• Frequency range: 8kHz to 1GHz (differential)
• I2C programmable via register or external EEPROM

Applications

• SONET/SDH network line cards
• Ethernet network switches
• Wireless base station baseband units

Procurement Notes

Verify the specific suffix '108' against official Renesas documentation to confirm factory pre-programmed configuration settings. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to integration into manufacturing processes.

Selection Notes

Select this component when a single PLL source with dual independent outputs is required. Ensure input signal compatibility with supported LVPECL, LVDS, LVHSTL, or HCSL standards. Verify that the 48-VFQFN package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the 8T49N222B family of Universal Frequency Translators. It shares core architecture with variants like the 8T49N222B-125NLGI8 but differs in factory-set programming configurations defined by the order code suffix.

Replacement Considerations

Direct functional substitutes within the same family include the 8T49N222B-125NLGI8. Verify pin-to-pin compatibility and ensure the replacement part's pre-programmed frequency settings meet the design requirements.