8T49N222B-129NLGI8

Overview

The 8T49N222B-129NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics Corporation. It features a single fractional-feedback PLL capable of generating up to four independent output frequencies ranging from 8kHz to 1GHz. The device supports multiple input levels including LVPECL, LVDS, LVHSTL, HCSL, and crystal inputs. Outputs are configurable as LVDS or LVPECL. It operates on a 2.375V to 3.465V supply within a -40°C to 85°C temperature range in a 48-VFQFN package.

Feature Summary

• Single fractional-feedback PLL with jitter attenuation and frequency synthesis capabilities
• Generates up to four independent output frequencies from 8kHz to 1GHz
• Supports LVPECL, LVDS, LVHSTL, HCSL, and crystal inputs
• Configurable LVDS or LVPECL outputs with hitless switching options

Applications

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

Procurement Notes

Verify the specific suffix '129' against official Renesas documentation to confirm exact factory pre-programmed configuration settings. Check for End-of-Life (EOL) status and lead times through authorized distributors. Ensure RoHS compliance matches project requirements.

Selection Notes

Select this component when a single PLL solution is required for jitter attenuation or frequency translation in high-speed networking applications. Compare against the 8T49N242 series if additional PLLs or different output configurations are needed. Verify I2C programming interface compatibility with system controllers.

Part Context

This part belongs to the FemtoClock NG family of universal frequency translators. These devices integrate low-phase noise frequency translators, jitter attenuators, and monitoring functions. The 8T49N222B variant specifically offers a single PLL architecture optimized for cost-sensitive yet high-performance timing applications.

Replacement Considerations

Consult Renesas or SiTime documentation for direct substitutes. The 8T49N242 series may serve as an alternative for multi-PLL requirements. Verify pinout and register compatibility before substitution.