Click to expand full text
Integrated Circuit Systems, Inc.
S a General atDescription The ICS9112-43/44 is a high speed clock generator designed .D to support Gigabit Ethernet system requirements. The w ICS9112-43/44 generates 125 MHz from a 20 MHz crystal. w wAn exact frequency multiplying ratio ensures better than ±100 ppm frequency accuracy using a standard AT crystal
with external load capacitors (typically 33pF±5% for an 18pF load crystal). Achieving ±100 ppm over four years requires the crystal to have a ±20 ppm initial accuracy, ±30 ppm temperature and ±5 ppm/year aging coefficients. The ICS9112-43/44 with less than 50ps accumulative jitter is well suited for Gigabit Ethernet applications.
ICS9112-43 Datasheet
