ICS840051AGILFT datasheet(1/10 Pages) ICST

Part #	ICS840051AGILFT

Description	FEMTOCLOCKS??CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

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Manufacturer	ICST [Integrated Circuit Systems]

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840051AGI

www.icst.com/products/hiperclocks.html

REV. A JANUARY 14, 2005

1

Integrated

Circuit

Systems, Inc.

ICS840051I

FEMTOCLOCKS™CRYSTAL-TO-

LVCMOS/LVTTL CLOCK GENERATOR

GENERAL DESCRIPTION

The ICS840051I is a Gigabit Ethernet Clock

Generator and a member of the HiPerClocksTM

family of high performance devices from ICS. The

ICS840051I can synthesize 10 Gigabit Ethernet,

SONET, or Serial ATA reference clock fre-

quencies with the appropriate choice of crystal and output

divider. The ICS840051I has excellent phase jitter performance

and is packaged in a small 8-pin TSSOP, making it ideal for

use in systems with limited board space.

FEATURES

• 1 LVCMOS/LVTTL output, 15Ω output impedance

• Crystal oscillator interface designed for

18pF parallel resonant crystals

• Output frequency range: 70MHz - 170MHz

• VCO range: 560MHz - 680MHz

• RMS phase jitter at 155.52MHz (1.875MHz - 20MHz):

0.48ps (typical)

• RMS phase noise at 155.52MHz

Offset Noise Power

100Hz ............... -99.7 dBc/Hz

1KHz ................ -120 dBc/Hz

10KHz ................ -128 dBc/Hz

100KHz ................ -127 dBc/Hz

• 3.3V or 2.5V operating supply

• -40°C to 85°C ambient operating temperature

• Lead-Free fully RoHS compliant

HiPerClockS™

ICS

FREQUENCY TABLE

s

t

u

p

n

I

y

c

n

e

u

q

e

r

F

t

u

p

t

u

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z

H

M

(

)

z

H

M

(

y

c

n

e

u

q

e

r

F

l

a

t

s

y

r

CL

E

S

_

Q

E

R

F

1

0

6

1

4

1

.

0

20

2

1

8

2

3

1

.

1

6

1

0

6

1

4

1

.

0

21

6

0

4

6

5

.

0

8

5

2

1

3

5

.

9

10

5

2

.

6

5

1

5

2

1

3

5

.

9

11

5

2

1

.

8

7

4

.

9

10

2

5

.

5

1

4

.

9

11

6

7

.

7

5

7

.

8

10

0

5

1

5

7

.

8

11

5

7

ICS840051I

8-Lead TSSOP

4.40mm x 3.0mm x 0.925mm

package body

G Package

Top View

VDDA

OE

XTAL_OUT

XTAL_IN

1

2

3

4

VDD

Q0

GND

FREQ_SEL

8

7

6

5

BLOCK DIAGRAM

OSC

Phase

Detector

VCO

560MHz-680MHz

0 ÷4 (default)

1 ÷8

÷32

(fixed)

XTAL_IN

XTAL_OUT

Q0

PIN ASSIGNMENT

OE

FREQ_SEL

Pullup

Pulldown

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