Renesas Electronics Corporation Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers 8T49N240-026NLGI8

The 8T49N240-026NLGI8 is a fractional-feedback single channel jitter attenuator from Quarktwin Technology Ltd., designed for high-performance applications. It features four differential outputs with excellent jitter performance, typically less than 200fs RMS, across a frequency range of 8kHz to 867MHz. The device supports multiple output levels including LVPECL, LVDS, HCSL, and LVCMOS, making it versatile for various applications. This clock generator accepts up to two differential or single-ended input clocks and a fundamental-mode crystal input, allowing for flexible integration into systems. It includes an internal PLL that can lock to either input reference clock or the crystal, functioning as a frequency synthesizer. The device also supports hitless reference switching, monitoring input clocks for Loss of Signal (LOS), and provides alarm outputs for clock failures. The 8T49N240 offers programmable loop bandwidth settings from 0.2Hz to 6.4kHz and features holdover capabilities with an initial accuracy of ¬±50ppB. It is programmable via an I2C interface and supports I2C master functionality for external EEPROM configuration. The device operates within a temperature range of -40¬8C to 85¬8C and comes in a compact 40-VFQFN package. Typical applications include OTN, CPRI interfaces, fiber optics, and high-speed Ethernet systems.