ICS9112M-42 View Datasheet(PDF) - Integrated Circuit Systems
Part Name
Description
Manufacturer
ICS9112M-42 Datasheet PDF : 5 Pages
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Integrated
Circuit
Systems, Inc.
ICS9112-41/42
Preliminary Product Preview
Frequency Generator for Gigabit Ethernet Systems
General Description
The ICS9112-41/42 is a high speed clock generator designed
to support Gigabit Ethernet system requirements. The ICS9112-
41/42 generates 125 MHz from a 25 MHz crystal.
An 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 ICS9112-41/42 with less than 25ps accumulative jitter is
well suited for Gigabit Ethernet applications.
Features
• Generates 125 MHz clocks from a 25 MHz crystal
• Less than 45ps one sigma jitter (15ps typ.)
• Less than ±130ps absolute jitter
• Less than 25ps accumulative jitter @ 256 cycles
• Rise/fall times less than 1.2ns driving 15pF
• On-chip loop filter components
• 3.0V-5.5V supply range
• 8-pin, 150-mil SOIC package
Applications
• Specifically designed to support the high-speed
clocking requirements of Gigabit Ethernet systems.
Block Diagram
ICS9112-41/42 Rev D 3/3/99
PRODUCT PREVIEW documents contain information on new
products in the sampling or preproduction phase of development.
Characteristic data and other specifications are subject to change
without notice.
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