844251BG-14

FEMTOCLOCK™ CRYSTAL-TO-LVDS CLOCK GENERATOR ICS844251-14 Features • • • • • • • • One differential LVDS output pair Crystal oscillator interface designed for 18pF, parallel resonant crystal (23.2MHz – 30MHz) Output frequency ranges: 145MHz – 187.5MHz and 580MHz – 750MHz VCO range: 580MHz – 750MHz RMS phase jitter at 156.25MHz, using a 25MHz crystal (1.875MHz – 20MHz): 0.53ps (typical) Full 3.3V or 2.5V output supply modes 0°C to 70°C ambient operating temperature Available in lead-free (RoHS 6) package General Description The ICS844251-14 is an Ethernet Clock Generator and a member of the HiPerClocksTM family of high HiPerClockS™ performance devices from IDT. The ICS844251-14 uses an 18pF parallel resonant crystal over the range of 23.2MHz – 30MHz. For Ethernet applications, a 25MHz crystal is used. The device has excellent