ICS840001-32

PRELIMINARY Integrated Circuit Systems, Inc. ICS840001-32 FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER FEATURES One LVCMOS/LVTTL output, 15Ω typical output impedence and one reference clock output 40MHz, 10pF parallel resonant crystal Output frequencies: 100MHz or 106.25MHz RMS phase jitter @ 106.25MHz, using a 40MHz crystal (637kHz - 5MHz): 0.78ps (typical) 3.3V operating supply 0°C to 70°C ambient operating temperature Availabe in both standard and lead-free RoHS-compliant packages GENERAL DESCRIPTION The ICS840001-32 is a two output LVCMOS/ LVTTL Synthesizer and is a member of the HiPerClockS™ HiPerClocks TM family of high perfor mance devices from ICS. The device uses a 40MHz crystal to provide a 40MHz reference clock output and to synthesize a 100MHz or 106.25MHz output. The ICS840001-32 has excellent <1ps phase jitter performance over the 637kHz – 5MHz integration range. The ICS840001-32 is packaged in a 3mm x 3mm www.DataSheet4U.com 16-pin VFQFN, making it ideal for use on space constrained boards. IC S FUNCTION TABLE Inputs Crystal Frequency (MHz) 40 40 SEL Input 0 1 Outputs Q Output REF_OUT Frequency (MHz) Frequency (MHz) 100 40 106.25 40 BLOCK DIAGRAM 40MHz PIN ASSIGNMENT VDDA GND nc nc REF_OUT VDD 1 XTAL_OUT 2 XTAL_IN 16 15 14 13 12 11 10 9 5 GND Q VDDO_Q VDD REF_OUT OSC XTAL_OUT SEL (Pullup) Synthesizer 100MHz or 106.25MHz XTAL_IN 3 SEL 4 6 nc Q 7 VDDO_REF_OUT 8 GND ICS840001-32 16-Lead VFQFN 3mm x 3mm x 0.95 package bo...