8T49N240-026NLGI

Overview

The 8T49N240-026NLGI is a FemtoClock NG Universal Frequency Translator manufactured by Renesas Electronics. It functions as a clock synthesizer and jitter attenuator, generating up to four differential output clocks ranging from 8 kHz to 867 MHz. The device accepts multiple input types, including LVPECL, LVDS, HCSL, and crystal oscillators. Key electrical specifications include an operating supply voltage range of 2.375 V to 3.465 V and a maximum operating current of 40 mA. It features low RMS phase jitter performance below 200 fs (12 kHz to 20 MHz) and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Generates up to four independent output frequencies using integer and fractional dividers.
• Supports flexible input configurations with hitless switching and monitoring capabilities.
• Configurable via I2C interface or external EEPROM for boot-from-EEPROM operation.
• Available in a compact 40-pin VFQFN package.

Applications

• 10 Gbps, 40 Gbps, and 100 Gbps network line cards
• Wireless base station baseband units
• Carrier Ethernet switches
• OTN multiplexers

Procurement Notes

Verify the specific suffix '026' against official Renesas documentation to confirm the exact factory-programmed frequency configuration. Ensure compatibility with the required output voltage levels (LVDS, LVPECL, or HCSL) for the target application design.

Selection Notes

Select this component when designing systems requiring precise jitter attenuation for high-speed serial interfaces. Confirm that the required output frequencies fall within the 8 kHz to 867 MHz range and that the 40-VFQFN package fits the PCB layout constraints.

Part Context

This part belongs to the FemtoClock NG family, designed for high-performance timing applications. It serves as a universal frequency translator capable of converting various input clock sources into clean, low-jitter outputs suitable for demanding telecommunications and data center environments.

Replacement Considerations

The 8T49N242 offers similar functionality with support for higher output frequencies up to 1.0 GHz. Verify pinout and register compatibility before substituting.