8430BY-71

www.icst.com/products/hiperclocks.html

REV. A SEPTEMBER 20, 2005

1

Integrated

Circuit

Systems, Inc.

ICS8430B-71

PRELIMINARY

The ICS8430B-71 is a general purpose, dual out-

put Crystal/LVCMOS-to-3.3V Differential LVPECL

High Frequency Synthesizer and a member of the

HiPerClockS™ family of High Performance Clock

Solutions from ICS. The ICS8430B-71 has a se-

lectable crystal oscillator interface or LVCMOS TEST_CLK.

The VCO operates at a frequency range of 250MHz to

700MHz. With the output configured to divide the VCO

frequency by 2, output frequency steps as small as 2MHz

can be achieved using a 16MHz crystal or test clock. Output

frequencies up to 700MHz can be programmed using the

serial or parallel interfaces to the configuration logic. The low

jitter and frequency range of the ICS8430B-71 make it an

ideal clock generator for most clock tree applications.

• Dual differential 3.3V LVPECL outputs

• Selectable crystal oscillator interface

or LVCMOS TEST_CLK

• Output frequency up to 700MHz

• Crystal input frequency range: 12MHz to 27MHz

• VCO range: 250MHz to 700MHz

• Parallel or serial interface for programming counter

and output dividers

• RMS period jitter: 9ps (maximum)

• Cycle-to-cycle jitter: 25ps (maximum)

• 3.3V supply voltage

• 0°C to 70°C ambient operating temperature

• Replaces 8430-71

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

packages

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

N2

32-Lead LQFP

7mm x 7mm x 1.4mm package body

Y Package

Top View

ICS8430B-71

HiPerClockS™

ICS

OSC

VCO_SEL

XTAL_SEL

TEST_CLK

XTAL_IN

XTAL_OUT

S_LOAD

S_DATA

S_CLOCK

nP_LOAD

M0:M8

N0:N2

VCO

PLL

FOUT0

nFOUT0

FOUT1

nFOUT1

TEST

÷ N

CONFIGURATION

INTERFACE

LOGIC

÷ M

0

1

0

1

÷ 16

PHASE DETECTOR

MR

÷ 2

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.