350MHZ, CRYSTAL-TO-LVCMOS/LVTTL

FREQUENCY SYNTHESIZER

ICS8402I

IDT™ / ICS™ LVCMOS/LVTTL FREQUENCY SYNTHESIZER

1

ICS8402AYI REV. A OCTOBER 16, 2007

General Description

The ICS8402I is a general purpose,

Crystal-to-LVCMOS/LVTTL High Frequency

Synthesizer and a member of the HiPerClockS™

family of High Performance Clock Solutions from

IDT. The ICS8402I 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 ICS8402I make it an ideal clock source for

Gigabit Ethernet and SONET applications.

Features

TEST_CLK

output dividers

packages

Block Diagram

HiPerClockS™

ICS

OSC

OE0

OE1

VCO_SEL

XTAL_SEL

TEST_CLK

XTAL_IN

XTAL_OUT

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 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

XTAL_OUT

TEST_CLK

XTAL_SEL

S_LOAD

S_DATA

S_CLOCK

MR

M5

M6

M7

M8

N0

N1

nc

GND

Pin Assignment

ICS8402I

32 Lead LQFP

7mm x 7mm x 1.4mm package body

Y Package

Top View

32 Lead VFQFN

5mm x 5mm x 0.925mm package body

K Package

Top View