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ICS9112-43

Integrated Circuit Systems
Part Number ICS9112-43
Manufacturer Integrated Circuit Systems
Description (ICS9112-43/44) Frequency Generator
Published Feb 10, 2006
Detailed Description Integrated Circuit Systems, Inc. S a General atDescription The ICS9112-43/44 is a high speed clock generator designed ....
Datasheet PDF File ICS9112-43 PDF File

ICS9112-43
ICS9112-43

Overview
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.
Frequency h Generator for Gigabit Ethernet Systems Features • • • • • • • • Generates 125 MHz clocks from a 20 MHz crystal Less than 45ps one sigma jitter (15ps typ.
) Less than ±130ps absolute jitter Less than 50ps accumulative jitter @ 256 cycles Rise/fall times less than 1.
2ns driving 15pF On-chip loop filter compon...


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