8T49N222B-109NLGI8

Overview

The 8T49N222B-109NLGI8 is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics Corporation. It features one fractional-feedback PLL capable of jitter attenuation or frequency synthesis, equipped with four integer output dividers to generate up to four independent output frequencies ranging from 8kHz to 1GHz. The device supports differential outputs in LVDS, LVPECL, HCSL, or LVCMOS formats. It accepts multiple input clock levels including LVPECL, LVDS, LVHSTL, and HCSL, operating within a supply voltage range of 2.375V to 3.465V and an ambient temperature range of -40°C to 85°C.

Feature Summary

• Generates up to four independent output frequencies from 8kHz to 1GHz using a single fractional-feedback PLL and four integer output dividers.
• Supports flexible input configurations accepting LVPECL, LVDS, LVHSTL, HCSL, or crystal references.
• Configurable output drivers selectable among LVDS, LVPECL, HCSL, and LVCMOS standards.
• Features auto/manual input clock selection with hitless switching and phase-slope limiting for transient control.

Applications

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

Procurement Notes

Verify the specific suffix '109' against official Renesas documentation to confirm factory-programmed frequency configurations. Confirm package availability as the standard variant utilizes a 48-VFQFN exposed pad. Check for End-of-Life notices or Product Change Notifications prior to final design commitment.

Selection Notes

Select this component when a single PLL solution is required to derive multiple independent clock frequencies from various input sources. Ensure the application requires the specific jitter performance characteristics of the FemtoClock NG technology. Verify that the target system supports I2C programming or external EEPROM boot configurations if dynamic reconfiguration is needed.

Part Context

This part belongs to the 8T49N222B series within the FemtoClock NG family. It shares architectural similarities with other universal frequency translators like the 8T49N241 and 8T49N242 but offers a distinct pinout and configuration set optimized for specific networking timing requirements.

Replacement Considerations

Direct pin-to-pin replacements may include other variants within the 8T49N222B series with different suffix codes. Cross-family alternatives such as the 8T49N241 or 8T49N242 require schematic and software adaptation due to differing pinouts and register maps.