ICS84326AM データシートの表示（PDF） - Integrated Circuit Systems

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ICS84326AM

CRYSTAL-TO-3.3V LVPECL SERIAL ATTACHED SCSI CLOCK SYNTHESIZER/FANOUT BUFFER

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

PRELIMINARY

ICS84326

CRYSTAL-TO-3.3V LVPECL

SERIAL ATTACHED SCSI CLOCK SYNTHESIZER/FANOUT BUFFER

GENERAL DESCRIPTION

The ICS84326 is a Crystal-to-3.3V LVPECL Clock

,&6

Synthesizer/Fanout Buffer designed for Serial

HiPerClockS™ Attached SCSI applications and is a member of

the HiperClockS family of High Performance Clock

Solutions from ICS. Using a 25MHz crystal, the

6 LVPECL outputs can be set for either 75MHz or 150MHz

using the frequency select pins. The low jitter/low phase noise

characteristics make it an ideal clock source for use in Serial

Attached SCSI applications or for other applications which

require a 75MHz or 150MHz reference clock.

FUNCTION TABLE

Inputs

Output Frequency

MR F_SEL

F_OUT

1

X

LOW

0

0

75MHz

0

1

150MHz

FEATURES

• 6 LVPECL outputs

• Crystal oscillator interface

• Output frequency: 75MHz or 150MHz

• Crystal input frequency: 25MHz

• Cycle-to-cycle jitter: 20ps (typical)

• RMS phase jitter at 150MHz, using a 25MHz crystal

(899.8KHz to 20MHz): TBD

• Phase noise:

Offset

Noise Power

100Hz ............... TBD

1KHz ............... TBD

10KHz ............... TBD

100KHz ............... TBD

• Full 3.3V or 3.3V core, 2.5V supply mode

• 0°C to 70°C ambient operating temperature

• Industrial temperature information available upon request

BLOCK DIAGRAM

PIN ASSIGNMENT

XTAL1

XTAL2

OSC

PLL

Feedback

Divider

MR

0

Output

/6 Q0:Q5

1

Divider

/6 nQ0:nQ5

Q0 1

nQ0 2

Q1 3

nQ1 4

Q2 5

nQ2 6

Q3 7

nQ3 8

Q4 9

nQ4 10

Q5 11

nQ5 12

24 VCCO

23 F_SEL

22 nc

21 MR

20 XTAL1

19 XTAL2

18 nc

1 7 VCCA

16 VCC

15 PLL_SEL

14 VEE

13 VCCO

PLL_SEL

F_SEL

ICS84326

24-Lead, 300-MIL SOIC

7.5mm x 15.33mm x 2.3mm body package

M Package

Top View

The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial

product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.

84326AM

www.icst.com/products/hiperclocks.html

REV. A MARCH 10, 2003

1

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