8T49N205A-005NLGI8

Overview

The 8T49N205A-005NLGI8 is a FemtoClock NG clock generator manufactured by Renesas Electronics Corporation. It operates within a supply voltage range of 2.375V to 3.465V and supports an input frequency range from 8kHz to 1GHz. The device features one PLL with a maximum output frequency of 1GHz. It provides four differential LVPECL outputs in a 32-VFQFN exposed pad package. The component functions as a jitter attenuator or frequency synthesizer, supporting I2C programming for register configuration.

Feature Summary

• Integrates low-phase noise frequency translation and jitter attenuation capabilities
• Supports flexible input reference clocks including crystal oscillators and external signals
• Provides programmable output frequencies via internal dividers and PLL feedback

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm pinout and electrical characteristics match design requirements. Confirm RoHS compliance status and moisture sensitivity level before assembly. Check for active product change notices regarding package or material updates. Ensure compatibility with existing I2C addressing schemes in the system architecture.

Selection Notes

Select this component when precise jitter attenuation is required for high-speed serial links. Evaluate the need for multiple independent output frequencies derived from a single reference. Consider the thermal performance of the VFQFN package for the intended enclosure environment. Verify that the available I2C interface meets the system's configuration speed requirements.

Part Context

This part belongs to the FemtoClock NG family of clock generators designed for networking and communications. These devices typically integrate phase-locked loops with fractional-N synthesis to achieve low jitter performance. The family supports various output formats and input configurations to accommodate diverse system timing architectures.

Replacement Considerations

Consult official substitution guides for compatible alternatives within the FemtoClock NG series. Verify pin-to-pin compatibility and electrical parameter equivalence before replacing. Review product change notifications for any functional differences between legacy and current revisions.