ICS843022

PRELIMINARY Integrated Circuit Systems, Inc. www.DataSheet4U.com ICS843022 FEMTOCLOCKS™ CRYSTAL-TO3.3V LVPECL CLOCK GENERATOR FEATURES 1 differential 3.3V LVPECL output Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal Output frequencies: 125MHz or 62.5MHz (selectable) RMS phase jitter @ 125MHz, using a 25MHz crystal (12KHz - 20MHz): 0.62ps (typical) RMS phase noise at 125MHz (typical) Offset Noise Power 100Hz ............... -94.6 dBc/Hz 1KHz .............. -122.8 dBc/Hz 10KHz .............. -132.2 dBc/Hz 100KHz .............. -132.0 dBc/Hz 3.3V operating supply 0°C to 70°C ambient operating temperature Industrial temperature information available upon request GENERAL DESCRIPTION The ICS843022 is a Fibre Channel Clock Generator and a member of the HiPerClocksTM family of high HiPerClockS™ performance devices from ICS. The ICS843022 uses a 25MHz crystal to synthesize 125MHz or 62.5MHz. The ICS843022 has excellent phase jitter performance, over the 12KHz – 20MHz integration range. The ICS843022 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. ICS FUNCTION TABLE Inputs FREQ_SEL 0 1 Output Frequencies (with a 25MHz crystal) 125MHz 62.5MHz BLOCK DIAGRAM PIN ASSIGNMENT VCCA VEE XTAL_OUT XTAL_IN 1 2 3 4 8 7 6 5 VCC Q0 nQ0 FREQ_SEL XTAL_IN OSC XTAL_OUT Output Divider nQ0 Q0 ICS843022 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View FREQ_SEL The Preliminary...