8402AY

www.icst.com/products/hiperclocks.html

REV. B OCTOBER 6, 2004

1

Integrated

Circuit

Systems, Inc.

ICS8402

The ICS8402 is a general purpose, Crystal-to-

LVCMOS/LVTTL High Frequency Synthesizer and

a member of the HiPerClockS™ family of High

Performance Clock Solutions from ICS. The

ICS8402 has a selectable TEST_CLK or crystal

inputs. The VCO operates at a frequency range of 250MHz

to 700MHz. The VCO frequency is programmed in steps equal

to the value of the input reference or crystal frequency. The

VCO and output frequency can be programmed using the

serial or parallel interfaces to the configuration logic. The low

phase noise characteristics of the ICS8402 make it an ideal

clock source for Gigabit Ethernet and SONET applications.

• 2 LVCMOS/LVTTL outputs

• Selectable crystal oscillator interface

or LVCMOS/LVTTL TEST_CLK

• Output frequency range: 15.625MHz to 350MHz

• Crystal input frequency range: 12MHz to 40MHz

• VCO range: 250MHz to 700MHz

• Parallel or serial interface for programming counter

and output dividers

• RMS period jitter: 8ps (typical)

• Cycle-to-cycle jitter: 40ps (typical)

• Full 3.3V or mixed 3.3V core/2.5V output supply voltage

• 0°C to 70°C ambient operating temperature

• Industrial temperature information available upon request

32 31 30 29 28 27 26 25

9 10 11 12 13 14 15 16

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

XTAL2

TEST_CLK

XTAL_SEL

S_LOAD

S_DATA

S_CLOCK

MR

M5

M6

M7

M8

N0

N1

nc

GND

32-Lead LQFP

7mm x 7mm x 1.4mm package body

Y Package

Top View

ICS8402

HiPerClockS™

ICS

OSC

OE0

OE1

VCO_SEL

XTAL_SEL

TEST_CLK

XTAL1

XTAL2

S_LOAD

S_DATA

S_CLOCK

nP_LOAD

M0:M8

N0:N1

VCO

PLL

Q0

Q1

TEST

CONFIGURATION

INTERFACE

LOGIC

÷ M

0

1

0

1

PHASE DETECTOR

÷2

÷4

÷8

÷16

MR

32-Lead VFQFN

5mm x 5mm x 0.75mm package body

K Package

Top View