ICS84321 datasheet(1/18 Pages) ICST

No. de pieza	ICS84321

Descripción Electrónicos	260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

PDF	18 Pages

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Fabricante Electrónico	ICST [Integrated Circuit Systems]

Página de inicio	http://www.icst.com

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84321AY

www.icst.com/products/hiperclocks.html

REV. B JUNE 9, 2005

1

Integrated

Circuit

Systems, Inc.

ICS84321

260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL

LVPECL FREQUENCY SYNTHESIZER

GENERAL DESCRIPTION

The ICS84321 is a general purpose, dual output

Crystal-to-3.3V Differential LVPECL High Frequency

Synthesizer and a member of the HiPerClockS™

family of High Performance Clock Solutions from

ICS.The ICS84321 has a selectable TEST_CLK or

crystal inputs.The VCO operates at a frequency range of 620MHz

to 780MHz. 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.

BLOCK DIAGRAM

PIN ASSIGNMENT

FEATURES

• Dual differential 3.3V LVPECL outputs

• Selectable crystal oscillator interface

or LVCMOS/LVTTL TEST_CLK

• Output frequency range: 103.3MHz to 260MHz

• Crystal input frequency range: 14MHz to 40MHz

• VCO range: 620MHz to 780MHz

• Parallel or serial interface for programming counter

and output dividers

• RMS period jitter: 3ps (typical)

• RMS phase jitter at 155.52MHz, using a 38.88MHz crystal

(12kHz to 20MHz): 2.5ps (typical)

Phase noise: 155.52MHz

Offset

Noise Power

100Hz .................. -84.1 dBc/Hz

1kHz ................ -109.8 dBc/Hz

10kHz ................ -126.3 dBc/Hz

100kHz ................ -128.7 dBc/Hz

• 3.3V supply voltage

• 0°C to 70°C ambient operating temperature

• Lead-Free package RoHS compliant

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

VCCA

S_LOAD

S_DATA

S_CLOCK

MR

M5

M6

M7

M8

N0

N1

nc

VEE

32-Lead LQFP

7mm x 7mm x 1.4mm package body

Y Package

Top View

ICS84321

HiPerClockS™

ICS

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

MR

÷ 3

÷ 4

÷ 5

÷ 6

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