ICS843002-01

Integrated Circuit Systems, Inc. ICS843002-01 www.DataSheet4U.com FEMTOCLOCKS™ CRYSTAL-TO3.3V LVPECL FREQUENCY SYNTHESIZER FEATURES Two 3.3V LVPECL outputs Selectable crystal oscillator interface or LVCMOS single-ended input Supports the following input frequencies: 156.25MHz, 125MHz and 62.5MHz VCO range: 560MHz - 680MHz RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz-20MHz): 0.54ps (typical) Typical phase noise at 156.25MHz Phase noise: Offset Noise Power 100Hz ............... -97.3 dBc/Hz 1KHz .............. -119.1 dBc/Hz 10KHz .............. -126.4 dBc/Hz 100KHz .............. -127.6 dBc/Hz Full 3.3V supply mode Lead-Free package fully RoHS compliant -30°C to 85°C ambient operating temperature GENERAL DESCRIPTION The ICS843002-01 is a 2 output LVPECL synthesizer optimized to generate Ethernet HiPerClockS™ reference clock frequencies and is a member of the HiPerClocksTM family of high performance clock solutions from ICS. Using a 25MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL[1:0]): 156.25MHz, 125MHz, and 62.5MHz. The ICS843002-01 uses ICS’ 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The ICS843002-01 is packaged in a small 20-pin TSSOP package. ICS FREQUENCY SELECT FUNCTION TABLE Inputs M Divider F_SEL1 F_SEL0 Value 0 0 25 0 1 1 1 0 1 25 25 Not Used N Divider ...