ICS843004

Integrated Circuit Systems, Inc. www.DataSheet4U.com ICS843004 FEMTOCLOCKS™LVCMOS/CRYSTAL-TO3.3V LVPECL FREQUENCY SYNTHESIZER FEATURES Four 3.3V LVPECL outputs Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input Supports the following output frequencies: 212.5MHz, 187.5MHz, 159.375MHz, 156.25, 106.25MHz, 53.125MHz VCO range: 560MHz - 680MHz RMS phase jitter @ 212.5MHz, using a 26.5625MHz crystal (637KHz - 10MHz): 0.72ps (typical) RMS phase noise at 212.5MHz (typical) Phase noise: Offset Noise Power 100Hz ............... -95.0 dBc/Hz 1KHz .............. -114.3 dBc/Hz 10KHz .............. -123.8 dBc/Hz 100KHz .............. -124.6 dBc/Hz Full 3.3V supply mode -30°C to 85°C ambient operating temperature GENERAL DESCRIPTION The ICS843004 is a 4 output LVPECL synthesizer optimized to generate Fibre Channel reference HiPerClockS™ clock frequencies and is a member of the HiPerClocksTM family of high performance clock solutions from ICS. Using a 26.5625MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL[1:0]): 212.5MHz, 187.5MHz, 159.375MHz, 156.25, 106.25MHz, and 53.125MHz. The ICS843004 uses ICS’ 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Fibre Channel jitter requirements. The ICS843004 is packaged in a small 24-pin TSSOP package. ICS FREQUENCY SELECT FUNCTION TABLE Input Frequency 26.5625 26.562...