8T49N285NLGI

Overview

The Renesas 8T49N285NLGI is a FemtoClock NG Ultra-Femto Jitter Attenuator designed for high-performance clock synthesis and jitter cleaning. It operates within a supply voltage range of 2.375V to 3.465V and supports input formats including HCSL, LVDS, and LVPECL. The device features a single PLL circuit with differential outputs in LVPECL format. It is housed in a 32-VFQFN package with an exposed pad, suitable for surface-mount applications across a temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low jitter attenuation capabilities compliant with GR.1244-CORE Stratum 5 standards
• Supports multiple input formats: HCSL, LVDS, and LVPECL
• Provides differential LVPECL outputs for low-noise signal distribution
• Integrated PLL with bypass option for flexible clock management

Applications

• Telecommunications infrastructure requiring strict timing synchronization
• High-speed data communication systems needing jitter-cleaned clocks
• Base station equipment adhering to GR.1244 standards
• Network switches and routers demanding precise clock generation

Procurement Notes

Verify the exact suffix (e.g., -998NLGI8) as the base model number may refer to a family. Confirm current availability status, as specific variants may be End-of-Life or have long lead times. Check RoHS compliance and moisture sensitivity level (MSL) ratings before procurement to ensure storage and handling requirements are met.

Selection Notes

Select this component when ultra-low phase noise and jitter attenuation are critical for system performance. Ensure the required output frequency and input source compatibility match the device's specifications. Consider the 32-VFQFN package size for PCB layout constraints and verify thermal dissipation requirements for the exposed pad design.

Part Context

This part belongs to the Renesas FemtoClock NG series, which specializes in low-jitter clock synthesizers and jitter cleaners. The 8T49N285A variant specifically targets telecommunications applications requiring compliance with Telcordia GR.1244 standards for stratum-level timing accuracy and reliability in network infrastructure.

Replacement Considerations

Direct replacements include other FemtoClock NG devices such as the 8T49N287A or 8T49N281C series, depending on pin count and output configuration requirements. Verify electrical parameters and package dimensions to ensure mechanical and functional compatibility during substitution.