8T49N488

FemtoClock® NG QUAD Universal Frequency Translator 8T49N488 DATA SHEET General Description The 8T49N488 is a quad PLL with FemtoClock® NG technology, it integrates low phase noise Frequency Translator / Synthesizer, Jitter attenuation, and with alarm and monitoring functions suitable for networking and communications applications. The device has four fully independent PLLs, each PLL is able to generate any output frequency in the 0.98MHz - 312.5MHz range and most output frequencies in the 312.5MHz - 1,300MHz range (see Table 3 for details). A wide range of input reference clocks and operation reference clock may be used as the source for the output frequency. Each PLL of 8T49N488 has three operating modes to support a very broad spectrum of applications: 1) Frequency Synthesizer Synthesizes output frequencies from an external reference clock REFCLK. Fractional feedback division is used, so there are no requirements for any specific input reference clock frequency to produce the desired output frequency with a high degree of accuracy. 2) High-Bandwidth Frequency Translator Applications: PCI Express, Computing, General Purpose Translates any input clock in the 16MHz - 710MHz frequency range into any supported output frequency. This mode has a high PLL loop bandwidth in order to track input reference changes, such as Spread-Spectrum Clock modulation. 3) Low-Bandwidth Frequency Translator Applications: Networking & Communications. Translates any input clock in the...