ICS9112-33 Datasheet, PDF (1/5 Pages) Integrated Circuit Systems – Frequency Generator for Fibre Channel Systems

Integrated
Circuit
Systems, Inc.
ICS9112-33/34
Preliminary Product Preview
Frequency Generator for Fibre Channel Systems
General Description
The ICS9112-33/34 are high-speed clock generators designed
to support fibre channel system requirements. The ICS9112-
33/34 generates 106.25 MHz from a 21.25 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 ICS9112-33/34 with less than 25ps accumulative jitter
is well suited for Fibre Channel applications.
Crystal: EC-21.25M (Ecliptek)
Features
• Generates 106.25 MHz clocks from a 21.25 MHz
crystal
• Less than 45ps one sigma jitter (10ps 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 fibre channel systems.
Block Diagram
ICS9112-33/34 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.