ICS843251-04

www.DataSheet4U.com PRELIMINARY Integrated Circuit Systems, Inc. ICS843251-04 FEMTOCLOCKS™ CRYSTAL-TO3.3V LVPECL CLOCK GENERATOR FEATURES 1 differential 3.3V LVPECL output Crystal oscillator interface designed for 18pF parallel resonant crystals Crystal input frequency range: 19.33MHz - 30MHz Output frequency range: 145MHz - 187.5MHz VCO frequency range: 580MHz - 750MHz RMS phase jitter at 156.25MHz (1.875MHz - 20MHz): 0.39ps (typical) 3.3V operating supply 0°C to 70°C ambient operating temperature Industrial temperature information available upon request Available in both standard and lead-free compliant packages GENERAL DESCRIPTION The ICS843251-04 is a 10Gb/12Gb Ethernet Clock Generator and a member of the HiPerClockS™ HiPerClocks TM family of high perfor mance devices from ICS. The ICS843251-04 can synthesize 10 Gigabit Ethernet and 12 Gigabit Ethernet with a 25MHz crystal. It can also generate SATA and 10Gb Fibre Channel reference clock frequencies with the appropriate choice of crystals. The ICS843251-04 has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. IC S CONFIGURATION TABLE Crystal Frequency (MHz) 25 25 WITH 25MHZ CRYSTAL N Output Divide 4 4 Output Frequency (MHz) 187.5 156.25 Application 12 Gigabit Ethernet 10 Gigabit Ethernet Inputs Feedback VCO Frequency Divide (MHz) 30 750 25 WITH 625 CONFIGURATION TABLE Crystal Frequency (MHz) 20 21.25 24 25....