ICS874003-02

www.DataSheet4U.com PCI EXPRESS™ JITTER ATTENUATOR ICS874003-02 GENERAL DESCRIPTION The ICS874003-02 is a high performance DifIC S ferential-to-LVDS Jitter Attenuator designed for HiPerClockS™ use in PCI Express systems. In some PCI Express systems, such as those found in desktop PCs, the PCI Express clocks are generated from a low bandwidth, high phase noise PLL frequency synthesizer. In these systems, a jitter attenuator may be required to attenuate high frequency random and deterministic jitter components from the PLL synthesizer and from the system board. The ICS874003-02 has a bandwidth of 400kHz. The 400kHz provides an intermediate bandwidth that can easily track tr iangular spread profiles, while providing good jitter attenuation. The ICS874003-02 uses IDT’s 3 rd Generation FemtoClock TM PLL technology to achive the lowest possible phase noise. The device is packaged in a 20 Lead TSSOP package, making it ideal for use in space constrained applications such as PCI Express add-in cards. FEATURES Three Differential LVDS output pairs One Differential clock input CLK and nCLK supports the following input types: LVPECL, LVDS, LVHSTL, SSTL, HCSL Output frequency range: 98MHz - 320MHz Input frequency range: 98MHz - 128MHz VCO range: 490MHz - 640MHz Cycle-to-cycle jitter: 35ps (maximum) Supports PCI-Express Spread-Spectrum Clocking The 400kHz bandwidth mode allows the system designer to make jitter attenuation/tracking skew design trade-offs 3.3V operati...