84427CM

www.icst.com/products/hiperclocks.html

REV. D NOVEMBER 30, 2005

1

Integrated

Circuit

Systems, Inc.

ICS84427

PRELIMINARY

The ICS84427 is a Crystal-to-LVDS Frequency

Synthesizer/Fanout Buffer and a member of the

HiPerClockS™ family of High Performance Clock

Solutions from ICS. The output frequency can be

programmed using the frequency select pins. The

low phase noise characteristics of the ICS84427 make it an

ideal clock source for 10 Gigabit Ethernet, 10 Gigabit Fibre

Channel, OC3 and OC12 applications.

• Six LVDS outputs

• Crystal oscillator interface

• Output frequency range: 77.76MHz to 625MHz

• Crystal input frequency: 19.44MHz, 25MHz or 25.5MHz

• RMS phase jitter at 155.52MHz, using a 19.44MHz crystal

(12kHz to 20MHz): 3.4ps (typical)

Phase noise:

Offset

Noise Power

100Hz ................. -95 dBc/Hz

1kHz ............... -110 dBc/Hz

10kHz ............... -120 dBc/Hz

100kHz ............... -121 dBc/Hz

• 3.3V supply voltage

• 0°C to 70°C ambient operating temperature

• Industrial temperature information available upon request

• Available in both standard and lead-free RoHS-compliant

packages

HiPerClockS™

ICS

Q0:Q5

ICS84427

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

1

2

3

4

5

6

7

8

9

10

11

12

F_SEL0

F_SEL1

MR

XTAL_IN

XTAL_OUT

F_SEL2

PLL_SEL

GND

PLL

Feedback

Divider

OSC

Output

Divider

0

1

XTAL_IN

XTAL_OUT

F_SEL2

PLL_SEL

MR

F_SEL0

nQ0:nQ5

24

23

22

21

20

19

18

17

16

15

14

13

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5

1

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.