ICS844011I

www.DataSheet4U.com PRELIMINARY Integrated Circuit Systems, Inc. ICS844011I FEMTOCLOCKS™ CRYSTAL-TO- LVDS CLOCK GENERATOR FEATURES (1) Differential LVDS output Crystal oscillator interface, 18pF parallel resonant crystal (20.4MHz - 28.3MHz) Output frequency range: 81.66MHz - 113.33MHz VCO range: 490MHz - 680MHz RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal (637kHz - 10MHz): 0.75ps (typical) 3.3V or 2.5V operating supply -40°C to 85°C ambient operating temperature GENERAL DESCRIPTION The ICS844011I is a Fibre Channel Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS844011I uses an 18pF parallel resonant crystal over the range of 20.4MHz - 28.3MHz. For Fibre Channel applications, a 26.5625MHz crystal is used. The ICS844011I has excellent <1ps phase jitter performance, over the 637kHz - 10MHz integration range. The ICS844011I is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. ICS COMMON CONFIGURATION TABLE - FIBRE CHANNEL Inputs Crystal Frequency (MHz) 26.5625 25 M 24 24 N 6 6 Multiplication Value M/N 4 4 Output Frequency (MHz) 106.25 100 BLOCK DIAGRAM OE Pullup PIN ASSIGNMENT VDDA GND XTAL_OUT XTAL_IN 1 2 3 4 8 7 6 5 VDD Q nQ OE XTAL_IN OSC XTAL_OUT Phase Detector VCO 490MHz - 680MHz N = ÷6 (fixed) Q nQ ICS844011I M = ÷24 (fixed) 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View The Preliminary Information...