ICS84325

www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS84325 CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER FEATURES 6 differential 3.3V LVPECL outputs Crystal oscillator interface Output frequency range: 106.25MHz to 250MHz Crystal input frequency: 25MHz and 25.5MHz Output skew: 60ps (maximum) RMS phase jitter at 212.5MHz, using a 25.5MHz crystal (637KHz to 10MHz): 2.76ps Phase noise: Typical at 212.5MHz Offset Noise Power 100Hz ................. -92 dBc/Hz 1KHz ................. -112 dBc/Hz 10KHz ................. -120 dBc/Hz 100KHz ................. -122 dBc/Hz 3.3V supply voltage 0°C to 70°C ambient operating temperature Lead-Free package available. GENERAL DESCRIPTION The ICS84325 is a Crystal-to-3.3V LVPECL Frequency Synthesizer with Fanout Buffer and a HiPerClockS™ member of the HiPerClockS™ family of High Performance Clock Solutions from ICS. The output frequency can be programmed using frequency select pins. The low phase noise characteristics of the ICS84325 make it an ideal clock source for Fibre Channel 1, Fibre Channel 2, Infiniband and Gigabit Ethernet applications. ICS FUNCTION TABLE Inputs MR 1 0 0 0 0 F_SEL1 X 0 0 1 1 F_SEL0 X 0 1 0 1 25.5MHz 25.5MHz 25MHz 25MHz XTAL Output Frequency F_OUT LOW 106.25MHz 212.5MHz 125MHz 250MHz Industrial temperature information available upon request BLOCK DIAGRAM PIN ASSIGNMENT Q0 nQ0 Q1 nQ1 Q2 nQ2 Q3 nQ3 Q4 nQ4 Q5 nQ5 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 ...