84325EM

www.icst.com/products/hiperclocks.html

REV. B OCTOBER 11, 2004

1

Integrated

Circuit

Systems, Inc.

ICS84325

The ICS84325 is a Crystal-to-3.3V LVPECL

Frequency Synthesizer with Fanout Buffer and a

member of the HiPerClockS™ family of High

Performance Clock Solutions from ICS. The

output frequency can be programmed using

frequency select pins. The low phase noise characteristics

of the ICS84325 make it an ideal clock source for Fibre

Channel 1, Fibre Channel 2, Infiniband and Gigabit

Ethernet applications.

• 6 differential 3.3V LVPECL outputs

• Crystal oscillator interface

• Output frequency range: 106.25MHz to 250MHz

• Crystal input frequency: 25MHz and 25.5MHz

• Output skew: 60ps (maximum)

• RMS phase jitter at 212.5MHz, using a 25.5MHz crystal

(637KHz to 10MHz): 2.76ps

• Phase noise: Typical at 212.5MHz

Offset

Noise Power

100Hz ................. -92 dBc/Hz

1KHz ................. -112 dBc/Hz

10KHz ................. -120 dBc/Hz

100KHz ................. -122 dBc/Hz

• 3.3V supply voltage

• 0°C to 70°C ambient operating temperature

• Lead-Free package available.

• Industrial temperature information available upon request

HiPerClockS™

ICS

Q0:Q5

ICS84325

24-Lead, 300-MIL SOIC

7.5mm x 15.33mm x 2.3mm body package

M Package

Top View

Q0

nQ0

Q1

nQ1

Q2

nQ2

Q3

nQ3

Q4

nQ4

Q5

nQ5

F_SEL0

F_SEL1

MR

XTAL1

XTAL2

PLL_SEL

PLL

Feedback

Divider

OSC

Output

Divider

0

1

XTAL1

XTAL2

F_SEL1

PLL_SEL

MR

F_SEL0

nQ0:nQ5

s

t

u

p

n

IL

A

T

Xy

c

n

e

u

q

e

r

F

t

u

p

t

u

O

R

M1

L

E

S

_

F0

L

E

S

_

FT

U

O

_

F

1X

X

W

O

L

00

0

z

H

M

5

.

5

2z

H

M

5

2

.

6

0

1

00

1

z

H

M

5

.

5

2z

H

M

5

.

2

1

2

01

0

z

H

M

5

2z

H

M

5

2

1

01

1

z

H

M

5

2z

H

M

0

5

2

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13