ICS843002I

Integrated Circuit Systems, Inc. ICS843002I www.DataSheet4U.com FEMTOCLOCKS™ CRYSTAL-TO-3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER FEATURES Two 3.3V or 2.5V LVPECL outputs Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input Supports the following output frequencies: 212.5MHz, 187.5MHz, 159.375MHz, 106.25MHz and 53.125MHz VCO range: 560MHz - 680MHz RMS phase jitter @212.5MHz (2.55MHz - 20MHz): 0.50ps (typical) Full 3.3V or 2.5V supply modes -40°C to 85°C ambient operating temperature Available in both standard and lead-free RoHS compliant packages GENERAL DESCRIPTION The ICS843002I is a 2 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, 106.25MHz, and 53.125MHz. The ICS843002I uses ICS’ FemtoClockTM low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Fibre Channel jitter requirements. The ICS843002I is packaged in a small 20-pin TSSOP package. IC S FREQUENCY SELECT FUNCTION TABLE Input Frequency 26.5625 26.5625 26.5625 26.5625 23.4375 Inputs M Divider F_SEL1 F_SEL0 Value 0 0 24 0 1 1 0 1 0 1 0 24 24 24 24 N Divider Value 3 4 6 12 3 M/N Divider Value 8 6 4 2 8 Output Freque...