ICS840002-32

PRELIMINARY Integrated Circuit Systems, Inc. ICS840002-32 FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER FEATURES Two LVCMOS/LVTTL outputs, 15Ω typical output impedance Crystal oscillator interface Output frequency range: 75MHz and 106.25MHz, or 212.5MHz RMS phase jitter at 106.25MHZ (637kHz - 5MHz): 0.86ps (typical) Full 3.3V or 3.3V core/2.5V output supply mode 0°C to 70°C ambient operating temperature GENERAL DESCRIPTION The ICS840002-32 is a 2 output LVCMOS/ LVTTL Synthesizer optimized to generate HiPerClockS™ Fibre Channel or Serial ATA reference clock frequencies and is a member of the HiPerClocks TM family of high perfor mance clock solutions from ICS. Using an 18pF parallel resonant crystal, the following frequencies can be generated based on 1 frequency select pin (SEL): 106.25MHz and 75MHz, or 212.5MHz. The ICS840002-32 uses ICS’ 3 rd generation www.DataSheet4U.com low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Fibre Channel and Serial ATA jitter requirements. The ICS840002-32 is packaged in a small 8-pin TSSOP package. ICS SELECT FUNCTION TABLE Input SEL 0 1 Output Frequency Range (MHz) Q0 75 75 Q1 106.25 212.5 BLOCK DIAGRAM 26.5625MHz PIN ASSIGNMENT Q0 XTAL_IN FemtoClock™ XTAL_OUT Q1 VDD XTAL_OUT XTAL_IN GND 1 2 3 4 8 7 6 5 SEL Q0 VDDO Q1 ICS840002-32 SEL 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View The Preliminary Information presented herein repre...