ICS843023I

Integrated Circuit Systems, Inc. ICS843023I www.DataSheet4U.com FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR FEATURES 1 differential 3.3V LVPECL output Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal Output frequency range: 245MHz - 320MHz VCO range: 490MHz - 640MHz RMS phase jitter @ 250MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.39ps (typical) Phase noise: Offset Noise Power 100Hz ............... -86.3 dBc/Hz 1kHz .............. -114.6 dBc/Hz 10kHz .............. -125.6 dBc/Hz 100kHz ................ -126 dBc/Hz 3.3V or 2.5V operating supply -40°C to 85°C ambient operating temperature Lead-Free package fully RoHS compliant GENERAL DESCRIPTION The ICS843023I is a Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS843023I uses a 25MHz crystal to synthesize 250MHz. The ICS843023I has excellent phase jitter performance, over the 1.875MHz – 20MHz integration range. The ICS843023I is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. ICS BLOCK DIAGRAM OE 25MHz XTAL_IN PIN ASSIGNMENT VCC XTAL_OUT XTAL_IN VEE 1 2 3 4 8 7 6 5 Q nQ VCC OE OSC XTAL_OUT Phase Detector VCO ÷2 (fixed) Q nQ ICS843023I ÷20 (fixed) 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View 843023AGI www.icst.com/products/hiperclocks.html 1 REV. A JUNE 29, 2005 Integrated Circuit Systems, Inc. ...