ICST ICS9112M-34, ICS9112M-33 Datasheet

Integrated
Circuit
Systems, Inc.

General Description Features

ICS9 112-33/34

Block Diagram

Frequency Generator for Fibre Channel Systems

Applications

ICS9112-33/34 Rev D 3/3/99

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)

• 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

• 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

2

ICS9112-33/34

Preliminary Product Preview

Pin Descriptions

Pin Configurations

8-Pin SOIC

Functionality

EO

2X,1X
)zHM(

TUOF

)zHM(

152.1252.601

052.12etatsirT

8-Pin SOIC

NIP

REBMUN

EMANNIPEPYTNOITPIRCSED

1DNGARWP.dnuorggolanA
2DNGRWP.dnuorGlatigiD
31XNI .sroticapacdaollanretxeseriuqeR.zHM52.12yllanimon;ecivedottupnikcolcrolatsyrC
42XNI.sroticapacdaollanretxeseriuqeR.ecivedmorftuptuoevirdlatsyrC
5EONI )TUOF(tuptuokcolcehtsetatsirtti,wolsiEOnehw:).pu_lluplanretnisah(elbanEtuptuO

6

DDVRWP)33-(ylppustlov0.5+ro3.3+

2KLCTUO)43-()zHM52.601(tuptuokcolC

7

DDVARWP)33-(.)egatlovrewoplatigidlauqetsuM(.rewopgolanA

DDVA+DDVRWP)43-(ylppustloV0.5+ro3.3+,rewopgolanadnalatigiD

81KLCTUO)zHM52.601(tuptuokcolC