ICS840001

Integrated Circuit Systems, Inc. ICS840001 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 - 10MHz): 0.696ps (typical) RMS phase noise at 106.25MHz (typical) Phase noise: Offset Noise Power 100Hz ............... -94.4 dBc/Hz 1KHz .............. -119.9 dBc/Hz 10KHz .............. -130.2 dBc/Hz 100KHz .............. -131.5 dBc/Hz 3.3V operating supply -30°C to 85°C ambient operating temperature GENERAL DESCRIPTION The ICS840001 is a Fibre Channel Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS840001 uses a 26.5625MHz crystal to synthesize either 106.25MHz or 212.5MHz, using the FREQ_SEL pin. The ICS840001 has excellent phase jitter performance, over the 637KHz – 10MHz integration range. The ICS840001 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 Q0 GND FREQ_SEL XTAL_IN OSC XTAL_OUT Phase Detector VCO 637.5MHz w/ 26.5625MH...