8T49N240-984NLGI

Overview

The Renesas 8T49N240-984NLGI is a FemtoClock NG ultra-performance jitter attenuator and clock synthesizer. It features four LVPECL/LVDS/HCSL outputs with a maximum output frequency of 867 MHz and accepts input frequencies up to 875 MHz. The device operates on a single power supply ranging from 2.375 V to 3.465 V. Packaged in a 40-pin VFQFN, it supports I2C programming and functions as a low phase noise frequency translator suitable for high-speed networking applications.

Feature Summary

• Ultra-low RMS phase jitter performance using fourth-generation FemtoClock NG PLL technology
• Four independent output channels configurable as LVPECL, LVDS, or HCSL
• Supports hitless switching between input clocks with phase-slope limiting options
• Integrated alarm and monitoring functions for clock signal integrity

Applications

• 10G/40G/100G SONET/SDH network line cards
• Carrier Ethernet switches and OTN equipment
• Wireless base station baseband units
• Test and measurement instrumentation

Procurement Notes

Verify the specific suffix '984' against official Renesas documentation to confirm factory pre-programmed frequency configurations. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to assembly. Ensure the ordering code matches the required boot mode and output voltage levels specified in the datasheet.

Selection Notes

Select this component when low phase jitter attenuation is critical for maintaining signal integrity in high-speed serial links. The 8T49N240 provides flexible output drive strengths and multiple input reference options. Verify that the required output frequencies fall within the 8 kHz to 867 MHz range supported by the integer dividers.

Part Context

This part belongs to the 8T49N240 series of universal frequency translators. It shares the core FemtoClock NG architecture with variants like the 8T49N241 and 8T49N242. These devices are designed to replace discrete clock generation solutions by integrating PLLs, dividers, and buffers into a single package.

Replacement Considerations

The 8T49N241 and 8T49N242 are related family members offering similar functionality. Check if fractional divider capabilities in the 8T49N241 are required for specific frequency synthesis needs not met by the integer dividers of the 8T49N240.