ICS8442B

DATA SHEET

ICS8442BY REVISION A NOVEMBER 18, 2013

1

©2013 Integrated Device Technology, Inc.

The ICS8442B is a general purpose, dual output Crystal-to-

Differential LVDS High Frequency Synthesizer . The ICS8442B

has a selectable TEST_CLK or crystal input. The TEST_CLK

input accepts LVCMOS or LVTTL input levels and translates

them to LVDS levels. 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 fre-

quency. The VCO and output frequency can be programmed

using the serial or parallel interface to the configuration logic.

The low phase noise characteristics of the ICS8442B makes

it an ideal clock source for Gigabit Ethernet and Sonet appli-

cations.

• Dual differential LVDS outputs

• Selectable crystal oscillator interface or

LVCMOS/LVTTL TEST_CLK

• Output frequency range: 31.25MHz to 700MHz

• Crystal input frequency range: 10MHz to 25MHz

• VCO range: 250MHz to 700MHz

• Parallel or serial interface for programming counter

and output dividers

• RMS period jitter: 2.7ps (typical)

• Cycle-to-cycle jitter: 18ps (typical)

• 3.3V supply voltage

• 0°C to 85°C ambient operating temperature

• Lead-Free package fully RoHS compliant

ICS 8442B

32-Lead LQFP

7mm x 7mm x 1.4mm package body

Y Package

Top View

OSC

VCO_SEL

XTAL_SEL

TEST_CLK

XTAL_IN

XTAL_OUT

S_LOAD

S_DATA

S_CLOCK

nP_LOAD

M0:M8

N0:N1

VCO

PLL

FOUT0

nFOUT0

FOUT1

nFOUT1

TEST

CONFIGURATION

INTERFACE

LOGIC

÷ M

0

1

0

1

PHASE DETECTOR

÷ 1

÷ 2

÷ 4

÷ 8

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

ICS8442