ICS840002-01

Integrated Circuit Systems, Inc. ICS840002-01 FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER FEATURES Two LVCMOS/LVTTL outputs @ 3.3V, 17Ω typical output impedance Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input Output frequency range: 56MHz - 175MHz VCO range: 560MHz - 700MHz Output skew: 12ps (maximum) RMS phase jitter at 156.25MHZ (1.875MHz - 20MHz): 0.47ps (typical) Phase noise: Offset Noise Power 100Hz ............... -97.4 dBc/Hz 1kHz .............. -120.2 dBc/Hz 10kHz .............. -127.6 dBc/Hz 100kHz .............. -126.1 dBc/Hz Full 3.3V or 3.3V core/2.5V output supply mode -30°C to 85°C ambient operating temperature Available in both standard and lead-free RoHS compliant packages GENERAL DESCRIPTION The ICS840002-01 is a 2 output LVCMOS/LVTTL 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_SEL1:0): 156.25MHz, 125MHz, and 62.5MHz. The ICS840002-01 uses ICS’ 3rd generation low phase noise VCO technology and can www.DataSheet4U.com achieve 1ps or lower typical random rms phase jitter, easily meeting Ethernet jitter requirements. The ICS840002-01 is packaged in a small 16-pin TSSOP package. IC S FREQUENCY SELECT FUNCTION TABLE Inputs F_SEL1 F_SEL0 0 0 1 1 0 1...