8T49N105A-002NLGI8

Overview

The 8T49N105A-002NLGI8 is a programmable clock generator from the FemtoClock NG family, manufactured by Renesas Electronics Corporation. It functions as a universal frequency translator and jitter attenuator, utilizing fractional-feedback PLL technology to generate precise output frequencies from various input references. The device supports multiple differential input levels including LVPECL, LVDS, HCSL, and LVHSTL, and provides configurable LVPECL or LVDS outputs. Designed for high-performance networking and communication systems, it features an I2C interface for register programming and includes alarm and monitoring capabilities. The component operates within a temperature range of -40°C to 85°C.

Feature Summary

• FemtoClock NG PLL technology with low RMS phase jitter performance
• Supports up to two differential inputs (LVPECL, LVDS, HCSL, LVHSTL) and multiple output configurations
• Programmable via I2C serial interface with alarm and monitoring functions
• Hitless switching and phase-slope limiting options for seamless clock transitions

Applications

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

Procurement Notes

Verify current availability status as this part number may be subject to discontinuation notices. Check for official Product Change Notifications (PCN) regarding assembly site changes or material updates. Confirm RoHS3 compliance and MSL rating prior to procurement. Ensure compatibility with existing I2C addressing and power supply requirements in the design.

Selection Notes

Select this component when low-jitter frequency translation is required for SONET/SDH or Ethernet applications. Verify that the input reference frequencies and desired output frequencies fall within the supported ranges. Consider the package type and pinout compatibility with the PCB layout. Evaluate whether the integrated jitter attenuation or synthesizer modes meet the specific system timing requirements.

Part Context

This device belongs to the 8T49N105 series of universal frequency translators. It shares architectural similarities with other FemtoClock NG devices like the 8T49N241 and 8T49N242 but offers specific configuration options tailored for certain networking standards. The 'A' suffix typically denotes a specific revision or feature set within the product line.

Replacement Considerations

Consult Renesas or authorized distributors for direct replacements if this part is discontinued. Similar devices in the FemtoClock NG family, such as the 8T49N241 or 8T49N242 series, may serve as functional alternatives depending on specific frequency and output requirements.