8T49N286-999NLGI

Overview

The 8T49N286-999NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It operates within a supply voltage range of 2.375V to 3.465V and supports an operating temperature from -40°C to 85°C. The device features a 72-VFQFN exposed pad package with dimensions of 10x10 mm. It provides one circuit capable of generating frequencies up to 1GHz, utilizing differential inputs and outputs. The input/output ratio is 5:8, supporting formats including HCSL, LVCMOS, LVDSM, LVHSTL, LVPECL, and crystal inputs.

Feature Summary

• Supports universal frequency translation with hitless switching capabilities for clock input monitoring
• Integrates phase-slope limiting to control output phase transients during mode changes
• Features programmable configuration via I2C interface or external EEPROM boot options

Applications

• SONET/SDH network line cards requiring GR.1244 compliance
• Synchronous Ethernet (SyncE) infrastructure equipment
• Carrier Ethernet switches and OTN systems

Procurement Notes

Verify the specific suffix '999' against official datasheets to confirm power-up behavior, as it typically indicates a disabled state upon initialization compared to other variants. Confirm moisture sensitivity level and reflow soldering profiles prior to assembly. Ensure compatibility with the required I2C address and boot source configuration for the target design.

Selection Notes

Select this component when designing systems requiring strict timing synchronization standards such as GR.1244 Stratum levels. Consider the 72-VFQFN package constraints for PCB layout. Evaluate the need for hitless switching and phase-slope limiting features if the application involves frequent clock domain transitions or requires minimal phase jitter disruption.

Part Context

This part belongs to the 8T49N286A series within the FemtoClock NG family. It serves as a specialized clock synthesizer and jitter cleaner designed for high-performance telecommunications and networking applications. The series is characterized by its ability to translate various input frequencies into precise output clocks while maintaining low phase noise and jitter performance.

Replacement Considerations

Consult official substitution guides for compatible parts within the 8T49N286A family. Verify pinout and electrical parameter equivalence before replacing existing components in production designs.