Renesas Electronics Corporation Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers 8T49N240-034NLGI

The 8T49N240-034NLGI is a fractional-feedback single channel jitter attenuator designed for high-performance applications. It features four differential outputs with excellent jitter performance of less than 200fs RMS, making it suitable for applications requiring precise clock signals. The device can generate output frequencies ranging from 8kHz to 867MHz, independent of the input reference frequencies, and supports various output levels including LVPECL, LVDS, HCSL, and LVCMOS. This clock generator accepts up to two differential or single-ended input clocks and a fundamental-mode crystal input. It includes an internal PLL that can lock to either input reference or the crystal, with programmable loop bandwidth settings from 0.2Hz to 6.4kHz. The device supports hitless reference switching and monitors input clocks for Loss of Signal (LOS), providing alarms for clock failures. Additionally, it offers holdover functionality with an initial accuracy of ¬±50ppB. The 8T49N240-034NLGI is programmable via an I2C interface and includes features such as output enable control, clock selection inputs, and status outputs for lock, holdover, and LOS. It operates over 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.