ICS840002I-01

www.IDT.com ICS840002I-01 FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER GENERAL DESCRIPTION The ICS840002I-01 is a 2 output LVCMOS/LVTTL ICS Synthesizer optimized to generate Ethernet HiPerClockS™ reference clock frequencies and is a member of the HiPerClocksTM family of high performance clock solutions from IDT. 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 ICS840002I-01 uses IDT’s 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical random rms phase jitter, easily meeting Ethernet jitter requirements. The ICS840002I01 is packaged in a small 16-pin TSSOP package. FREQUENCY SELECT FUNCTION TABLE FEATURES Two LVCMOS/LVTTL outputs @ 3.3V, 17Ω typical output impedance Selectable crystal oscillator interface or LVCMOS single-ended input Supports the following output frequencies: 156.25MHz, 125MHz and 62.5MHz 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) Offset Noise Power 100Hz ............... -97.4 dBc/Hz 1kHz ............. -120.2 dBc/Hz 10kHz ............. -127.6 dBc/Hz 100kHz ............. -126.1 dBc/Hz Power supply modes: Core/Output 3.3V/3.3V 3.3V/2.5V 2.5V/2.5V -40°C to 85°C ambient operating temperature Available in both standard (RoHS 5) and lead-free Ro...