ICS840004

FEMTOCLOCKS™ CRYSTAL-TO-LVCMOS/ LVTTL FREQUENCY SYNTHESIZER ICS840004 GENERAL DESCRIPTION The ICS840004 is a 4 output LVCMOS/LVTTL IC S Synthesizer optimized to generate Ether net HiPerClockS™ reference clock frequencies and is a member of the HiPerClocks TM family of high performance clock solutions from IDT. Using a 26.5625MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL1:0): 212.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, and www.DataSheet4U.com 53.125MHz. The ICS840004 uses IDT’s 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical random r ms phase jitter, easily meeting Ethernet jitter requirements. The ICS840004 is packaged in a small 20-pin TSSOP package. FEATURES Four LVCMOS/LVTTL outputs, 17Ω typical output impedance Selectable crystal oscillator interface or LVCMOS single-ended input Supports the following input frequencies: 212.5MHz, 159.375MHz, 156.25MHz, 106.25MHz and 53.125MHz VCO range: 560MHz - 700MHz RMS phase jitter @ 212.5MHz (637kHz - 10MHz): 0.49ps typical, VDDO = 3.3V Phase noise: Offset Noise Power 100Hz ............... -88.8 dBc/Hz 1kHz ............. -109.0 dBc/Hz 10kHz ............. -116.1 dBc/Hz 100kHz ............. -117.5 dBc/Hz Full 3.3V or mixed 3.3V core/2.5V output supply mode 0°C to 70°C ambient operating temperature Available in both standard (RoHS 5) and lead-free (RoHS 6) packages FREQUENCY SELECT FUNCTION TABLE Input Fre...