Integrated

Circuit

Systems, Inc.

General Description

Features

ICS9112-35/36

Block Diagram

Frequency Generator for Fibre Channel Systems

Applications

9112-35 9112-36 Rev D 3/3/99

The ICS9112-35/36 are high-speed clock generators designed

to support fibre channel system requirements. The ICS9112-

35/36 generates 106.25 MHz from a 17 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 ICS9112-35/36 with less than 40ps accumulative jitter

is well suited for Fibre Channel applications.

•

Generates 106.25 MHz clocks from a 17 MHz crystal

•

Less than 45ps one sigma jitter (15ps typ.)

•

Less than ±130ps absolute jitter

•

Less than 40ps 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

•

Specifically designed to support the high-speed

clocking requirements of fibre channel systems.

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.

Preliminary Product Preview