ICS844252-04

www.DataSheet4U.com PRELIMINARY Integrated Circuit Systems, Inc. ICS844252-04 FEMTOCLOCKS™ CRYSTAL-TOLVDS CLOCK GENERATOR GENERAL DESCRIPTION The ICS844252-04 is a 10Gb/12Gb Ethernet Clock Generator and a member of the HiPerClockS™ HiPerClocks TM family of high perfor mance devices from ICS. The ICS844252-04 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 ICS844252-04 has excellent phase jitter performance and is packaged in a small 16-pin TSSOP, making it ideal for use in systems with limited board space. FEATURES Two differential LVDS outputs 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): 0.36ps (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 IC S CONFIGURATION TABLE Crystal Frequency (MHz) 25 25 WITH 25MHZ CRYSTAL Inputs VCO Frequency (MHz) 750 625 N Output Divide 4 4 Output Frequency (MHz) 187.5 156.25 Application 12 Gigabit Ethernet 10 Gigabit Ethernet Feedback Divide 30 25 WITH CONFIGURATION TABLE Crystal Frequency (MHz) 20 21.25 24 25.5 30 SELE...