ICS840051

Integrated Circuit Systems, Inc. ICS840051 FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR FEATURES 1 LVCMOS/LVTTL output, 15Ω output impedance Crystal oscillator interface designed for 18pF parallel resonant crystals Output frequency range: 70MHz - 170MHz VCO range: 560MHz - 680MHz RMS phase jitter at 155.52MHz (1.875MHz - 20MHz): 0.48ps (typical) RMS phase noise at 155.52MHz Offset Noise Power 100Hz ............... -99.7 dBc/Hz 1KHz ................ -120 dBc/Hz 10KHz ................ -128 dBc/Hz 100KHz ................ -127 dBc/Hz 3.3V operating supply 0°C to 70°C ambient operating temperature Lead-Free fully RoHS compliant Industrial temperature information available upon request GENERAL DESCRIPTION The ICS840051 is a Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS840051 can synthesize 10 Gigabit Ethernet, SONET, or Serial ATA reference clock frequencies with the appropriate choice of crystal and output divider. The ICS840051 has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. www.DataSheet4U.com ICS FREQUENCY TABLE Inputs Crystal Frequency (MHz) 20.141601 20.141601 19.53125 19.53125 19.44 19.44 18.75 18.75 FREQ_SEL 0 1 0 1 0 1 0 1 Output Frequency (MHz) 161.132812 80.566406 156.25 78.125 155.52 77.76 15 0 75 BLOCK DIAGRAM OE Pullup FREQ_SEL Pulldown PIN ASSIGNMENT VDDA OE ...