843204AGI

www.icst.com/products/hiperclocks.html

REV. A JANUARY 6, 2006

1

Integrated

Circuit

Systems, Inc.

ICS843204I

PRELIMINARY

PLL

OSC

÷4

OSC

25MHz

19.44MHz

PLL

÷4

622.08MHz

155.52MHz

625MHz

156.25MHz

0

1

0

1

0

1

0

1

The ICS843204I is a 4 output LVPECL

Synthesizer optimized to generate Gigabit

Ethernet and SONET reference clock fre-

family of high performance clock solutions from

ICS. Using a 19.44MHz and 25MHz, 18pF parallel resonant

crystal, 155.52MHz and 156.25MHz frequencies can be

phase noise VCO technology and can achieve 1ps or lower

typical RMS phase jitter. The ICS843204I is packaged in a

48-pin TSSOP package.

• Four 3.3V LVPECL outputs

• Selectable crystal oscillator interface

or LVCMOS/LVTTL single-ended input

• Supports the following output frequencies: 155.52MHz

and 156.25MHz

• VCO range: 560MHz - 680MHz

• RMS phase jitter @ 155.52MHz, using a 19.44MHz cryst

al

(12kHz - 13MHz): 0.86ps (typical)

• RMS phase jitter @ 156.25MHz, using a 19.44MHz cryst

al

(1.875MHz - 20MHz): 0.52ps (typical)

• Full 3.3V supply mode

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

• Available in both standard and lead-free RoHS

compliant packages

HiPerClockS™

ICS

ICS843204I

48 Lead TSSOP

6.1mm x 12.5mm x 0.93mm

package body

G Package

Top View

nQA1

QA1

nQA0

QA0

nc

SELA1

SELA0

PLL_BYPASS_A

nc

nc

nc

nc

XTAL_IN1

XTAL_OUT1

CLK1

IN_SEL_B

PLL_BYPASS_B

nc

QB0

nQB0

QB1

nQB1

IN_SEL_A

CLK0

XTAL_IN0

XTAL_OUT0

nc

OEA0

OEA1

nc

nc

SELB0

OEB0

OEB1

SELB1

nc

nc

nc

nc

nc

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

QA0

nQA0

QA1

nQA1

QB0

nQB0

QB1

nQB1

PLL_BYPASS_A

IN_SELA

CLK0

XTAL_IN0

XTAL_OUT0

PLL_BYPASS_B

IN_SELB

CLK1

XTAL_IN1

XTAL_OUT1

SELA1

OEA1

SELA0

OEA0

SELB1

OEB1

SELB0

OEB0

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.