ICS840001I

PRELIMINARY Integrated Circuit Systems, Inc. ICS840001I FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR FEATURES 1 LVCMOS/LVTTL output, 7Ω typical output impedence Crystal oscillator interface designed for 26.5625MHz, 18pF parallel resonant crystal Selectable 106.25MHz or 212.5MHz output frequency VCO range: 560MHz to 680MHz RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal (637kHz - 5MHz): 0.70ps (typical) 3.3V or 2.5V operating supply -40°C to 85°C ambient operating temperature GENERAL DESCRIPTION The ICS840001I is a Fibre Channel Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS840001I uses a 26.5625MHz crystal to synthesize either 106.25MHz or 212.5MHz, using the FREQ_SEL pin. The ICS840001I has excellent phase jitter performance, over the 637kHz – 5MHz integration range. The ICS840001I is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. www.DataSheet4U.com ICS FUNCTION TABLE Input FREQ_SEL 0 1 Crystal: 26.5625MHz Output Frequencies 106.25MHz (Default) 212.5MHz BLOCK DIAGRAM OE FREQ_SEL (Pullup) (Pulldown) PIN ASSIGNMENT VDDA OE XTAL_OUT XTAL_IN 1 2 3 4 8 7 6 5 VDD Q GND FREQ_SEL XTAL_IN OSC XTAL_OUT Phase Detector VCO 637.5MHz w/ 26.5625MHz Ref. ÷3 1 Q ICS840001I 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View ÷6 0 M = ÷24 (fixed) The Preliminary Information presented herein represents a product in ...