ICS840002 datasheet(1/13 Pages) ICST

No de pièce	ICS840002

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

PDF	13 Pages

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Fabricant	ICST [Integrated Circuit Systems]

Site Internet	http://www.icst.com

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1 / 13 page

Integrated

Circuit

Systems, Inc.

840002AGI

www.icst.com/products/hiperclocks.html

REV. A MARCH 10, 2005

1

ICS840002I

FEMTOCLOCKS™CRYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

GENERAL DESCRIPTION

The ICS840002I is a 2 output LVCMOS/LVTTL

Synthesizer optimized to generate Fibre Channel

reference clock frequencies and is a member of

the HiPerClocksTM family of high performance

clock solutions from ICS. Using a 26.5625MHz

18pF parallel resonant crystal, the following frequencies can be

generated based on the 2 frequency select pins (F_SEL1:0):

212.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, and

53.125MHz.The ICS840002I uses ICS’ 3rd generation low phase

noise VCO technology and can achieve 1ps or lower typical

rms phase jitter, easily meeting Fibre Channel jitter requirements.

The ICS840002I is packaged in a 16-pin TSSOP package.

HiPerClockS™

ICS

BLOCK DIAGRAM

PIN ASSIGNMENT

F_SEL0

nXTAL_SEL

TEST_CLK

OE

MR

nPLL_SEL

VDDA

VDD

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

F_SEL1

GND

Q0

Q1

VDDO

XTAL_IN

XTAL_OUT

ICS840002I

16-Lead TSSOP

4.4mm x 5.0mm x 0.92mm

package body

G Package

Top View

FEATURES

• Two LVCMOS outputs @ 3.3V, 17

Ω typical output impedance

• Selectable crystal oscillator interface

or LVCMOS single-ended input

• Output frequency range: 46.66MHz - 233.33MHz

• VCO range: 560MHz - 700MHz

• Supports the following output frequencies: 212.5MHz,

159.375MHz, 156.25MHz, 106.25MHz and 53.125MHz

• RMS phase jitter @ 212.5MHz (637KHz - 10MHz):

0.83ps (typical)

Typical phase noise at 212.5MHz:

Offset

Noise Power

100Hz ............... -91.3 dBc/Hz

1KHz .............. -114.3 dBc/Hz

10KHz .............. -120.7 dBc/Hz

100KHz .............. -120.2 dBc/Hz

• Power supply modes:

Core/Output

3.3V/3.3V

3.3V/2.5V

2.5V/2.5V

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

• Lead-Free package RoHS compliant

Q0

Q1

OE

F_SEL1:0

nPLL_SEL

nXTAL_SEL

XTAL_IN

XTAL_OUT

TEST_CLK

MR

OSC

Phase

Detector

VCO

M = ÷24 (fixed)

F_SEL1:0

0 0 ÷3

0 1 ÷4

1 0 ÷6

1 1 ÷12 (default)

0

1

0

2

N

26.5625MHz

Pullup

Pulldown

Pullup:Pullup

Pulldown

FREQUENCY SELECT FUNCTION TABLE

y

c

n

e

u

q

e

r

F

t

u

p

n

I

)

z

H

M

(

s

t

u

p

n

I

y

c

n

e

u

q

e

r

F

t

u

p

t

u

O

)

z

H

M

(

1

L

E

S

_

F0

L

E

S

_

Fe

u

l

a

V

r

e

d

i

v

i

D

Me

u

l

a

V

r

e

d

i

v

i

D

Ne

u

l

a

V

o

i

t

a

R

N

/

M

5

2

6

5

.

6

20

0

4

23

8

5

.

2

1

2

5

2

6

5

.

6

20

1

4

24

6

5

7

3

.

9

5

1

5

2

6

5

.

6

21

0

4

26

4

5

2

.

6

0

1

5

2

6

5

.

6

21

1

4

22

12

5

2

1

.

3

5

6

1

4

0

.

6

20

1

4

24

6

5

2

.

6

5

1

Numéro de pièce similaire - ICS840002

Fabricant	No de pièce	Fiches technique	Description
Integrated Circuit Syst...	ICS840002	196Kb / 12P	FEMTOCLOCKS??CRYSTAL-TO LVCMOS/
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	ICS840002AG	196Kb / 12P	FEMTOCLOCKS??CRYSTAL-TO LVCMOS/
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Integrated Device Techn...	ICS840002I-01	264Kb / 13P	FEMTOCLOCKS??CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER
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Numéro de pièce similaire - ICS840002

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