8T49N240-027NLGI

Overview

The Renesas 8T49N240-027NLGI is a FemtoClock NG Universal Frequency Translator and Jitter Attenuator. It features four LVPECL/LVDS/HCSL outputs capable of generating frequencies up to 867 MHz from inputs up to 875 MHz. The device operates on a single supply voltage ranging from 2.375 V to 3.465 V with a typical operating current of 40 mA. Packaged in a 6x6 mm VFQFPN-40 format, it supports I2C programming and includes phase-slope limiting for hitless switching. It is designed for applications requiring precise clock generation and jitter cleaning within the -40°C to +85°C temperature range.

Feature Summary

• Generates up to four independent output frequencies (LVPECL, LVDS, or HCSL) from two differential input clocks or an external crystal.
• Supports fractional output dividers for flexible frequency synthesis up to 1 GHz.
• Features Phase-Slope Limiting and fully hitless switching options to control output phase transients during clock source changes.
• Programmable via I2C interface or external EEPROM for custom configuration.

Applications

• SONET/SDH and Ethernet network line cards
• Wireless base station baseband units
• Carrier Ethernet switches

Procurement Notes

Verify the specific suffix '027' against official Renesas documentation to confirm factory pre-programmed frequency configurations. Confirm availability status as distribution channels may report limited stock or end-of-life transitions. Ensure the ordering code matches the required output levels and boot source settings defined in the datasheet.

Selection Notes

Select this component when designing systems requiring low-jitter clock translation for high-speed serial interfaces. Verify that the required output frequencies fall within the 8 kHz to 867 MHz range. Ensure the design accommodates the 2.375 V to 3.465 V supply voltage and utilizes the I2C interface for configuration management.

Part Context

This part belongs to the 8T49N240 series of FemtoClock NG devices. The family provides universal frequency translation capabilities for telecommunications and datacom equipment. The specific model integrates a fractional-feedback PLL and multiple output dividers to meet strict jitter compliance standards for various networking protocols.

Replacement Considerations

Consult the official Renesas cross-reference guide for verified substitutes. Note that timing product lines may undergo manufacturer transitions; verify if alternative sources are available through authorized distributors or successor entities.