ICS843031AGT

PRELIMINARY Integrated Circuit Systems, Inc. ICS843031 FEMTOCLOCKS™ CRYSTAL-TO3.3V LVPECL CLOCK GENERATOR FEATURES 1 differential 3.3V LVPECL output Crystal oscillator interface designed for 18pF parallel resonant crystals VCO frequency range: 580MHz - 700MHz RMS phase jitter @312.5MHz (1.875MHz - 20MHz): 0.5ps (typical) 3.3V operating supply 0°C to 70°C ambient operating temperature Industrial temperature information available upon request GENERAL DESCRIPTION The ICS843031 is a 1 Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS843031 can synthesize 1 Gigabit Ethernet, SONET, or Serial ATA reference clock frequencies with the appropriate choice of crystal and output divider. The ICS843031 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. ICS FREQUENCY TABLE Inputs Crystal Frequency (MHz) 25.92 26.04166 26.5625 M/N Ratio (Multiplier) 12 12 12 Output Frequency (MHz) 311.04 312.5 318.75 BLOCK DIAGRAM OE PIN ASSIGNMENT VCC XTAL_OUT XTAL_IN VEE 1 2 3 4 8 7 6 5 Q0 nQ0 VCC OE XTAL_IN OSC XTAL-OUT Phase Detector VCO ÷2 nQ0 Q0 ICS843031 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View ÷24 (fixed) The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial product characterizatio...